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Various Rejuvenation Behaviors of Zr-Based Metallic Glass by Cryogenic Cycling Treatment with Different Casting Temperatures

Nanoscale Research Letters201813:398

  • Received: 4 September 2018
  • Accepted: 22 November 2018
  • Published:


The rejuvenation behavior of an Zr50Cu40Al10 (at.%) metallic glass upon cryogenic cycling treatment has been investigated. At a high casting temperature, the microstructure of the glass is quite homogenous and thus, internal stress cannot be generated during cycling. Therefore, the glass cannot be rejuvenated by cryogenic cycling treatment. In the contrary, by lowering the casting temperature, nano-sized heterogeneity can be induced and subsequently generates the internal stress and rejuvenates the glass. Once the glass is rejuvenated, the more induced free volume can plasticize the glass with a higher plastic strain. These findings point out that the synthesis conditions can tailor the heterogeneity of the glass and subsequently affect the following rejuvenation behavior upon thermal treatment. It can also help understand the mechanisms of rejuvenation of metallic glass upon cryogenic cycling treatment.


  • Metallic glass
  • Rejuvenation
  • Cryogenic cycling
  • Casting temperature
  • Heterogeneity


The bulk metallic glasses (BMGs) have attracted a lot of interests because of their superior mechanical properties such as high fracture strength and large elastic limit, which originates from their unique long-range disordered microstructures [13]. To suppress the nucleation and growth of crystalline phase during solidification, rapid quenching techniques are always required during the fabrication of BMGs [46]. The non-equilibrium solidification process makes BMGs possess higher configurational potential energy compared with their crystalline counterparts [7]. Thus, during annealing, the microstructures of BMGs tend to change toward a lower energy state (relaxation), which makes them more like the crystalline counterparts [8]. The so-called relaxation process of BMGs always degrades the properties of them, especially the mechanical properties, e.g., the embrittlement of BMGs after relaxation [9]. Furthermore, the BMGs can even crystallize by supplying thermal or mechanical energy. Dudina et al. have investigated the crystallization behavior of Ti-Cu metallic glass under high-current density electrical pulses [10]. They found that the crystallized microstructures of treated metallic glass vary with different pulse parameter and the crystalline phase can be as small as nano-size, which proves local melting and solidification during electrical pulse. In the contrary, the metastable BMGs can be also tailored to a higher energy state by both thermal and mechanical methods (rejuvenation), such as recovery annealing and severe plastic deformation [1113]. Recently, Ketov et al. have found a novel deep cryogenic cycling treatment (DCT) to rejuvenate the BMGs, in which the samples are cooled and heated cyclically during room and cryogenic temperature (77 K) [14]. The mechanism for this rejuvenation is considered to be the intrinsic heterogeneous structure of amorphous phase, which generates internal stress during cooling and heating. In this study, by using our original developed DCT instrument, the rejuvenation behavior of Zr50Cu40Al10 (at.%) during DCT have been investigated with cycling number of 30, denoted as DCT30. Two kinds of casting temperatures have been chosen by varying the heating current during copper mold casting, i.e., 9 A (high temperature) and 7 A (low temperature), denoted as HT and LT, respectively. The microstructures and mechanical properties of each sample are investigated in detail.


Sample Preparation

Master alloys were prepared by arc-melting high-purity Cu, Zr, and Al metal pieces in a Ti-gettered argon atmosphere in a water-cooled copper hearth. The BMG was fabricated by casting the master alloy into a copper mold to produce a 2-mm-diameter rod-shaped sample (As-cast sample). The original instrument to conduct DCT has been described in our previous study [11]. By using this instrument, the samples can be cyclically cooled and heated between room temperature and 113 K.

Sample Characterization

The structures of the samples were examined by X-ray diffraction (XRD; Bruker D8 Advance) with Cu Kα radiation, and transmission electron microscopy (TEM, JEOL JEM-2100F) with an acceleration voltage of 200 kV. The glass transition temperature (Tg) and the onset crystalline temperature (Tx) were measured by differential scanning calorimeter (DSC) in argon at a heating rate of 20 K/min. The specific heat capacities were measured by comparing them with a sapphire standard sample. The density was measured using an Ar gas pycnometer (AccuPyc II 1340, Micromeritics Co. Ltd.). Compression tests were performed at a strain rate of 5 × 10−4 s−1 at room temperature using an Instron 5982 mechanical testing machine. Multiple compression tests using at least four samples each were conducted to confirm the reproducibility.

Results and Discussion

Rejuvenation Behavior of HT Samples

Figure 1a shows the XRD patterns of both As-cast and DCT30 for HT samples, which exhibits similar board peak of amorphous phase without any obvious crystalline peaks. The DSC curves of both samples are shown in Fig. 1b, in which Tg and Tx are pointed out for each sample. Similar to XRD results, Tg and Tx for both samples are also very close, i.e., 690 K and 780 K for As-cast and 688 K and 781 K for DCT30, respectively. These results indicate that the amorphous phase does not have great changes during DCT, such as crystallization. Figure 1c shows the heat flow of both samples upon isothermal annealing at 740 K (1.07 Tg), in which the incubation time of crystallization (tx) can be observed. By measuring the point of intersection before and during crystallization, tx are found to be 12.6 and 12.5 min for As-cast and DCT30, respectively. The similar tx also suggest that the resistance for both samples against crystallization are very alike. Furthermore, to evaluate the rejuvenation behavior more precisely, relaxation enthalpy (ΔHrelax) are always used [14, 15], given as follows:
$$ \Delta {H}_{relax}={\int}_{RT}^T\Delta {C}_p dT, $$
Fig. 1
Fig. 1

a XRD and b DSC curves of both As-cast and DCT30 samples cast at HT, c heat-flow as a function of time during isothermal annealing (740 K), and (d) specific heat of both As-cast and DCT30 samples cast at HT

where ΔCp = Cp,s − Cp,r, and Cp,s and Cp,r are the specific heats of the sample and its relaxed state, respectively. In the present study, the relaxed state was obtained by annealing at 725 K (~ 1.05 Tg) for 2 min followed by a 20 K/min cooling. The specific heat curves of both samples and their relaxed state are plotted in Fig. 1d. Based on Eq. (1), ΔHrelax for As-cast and DCT30 was calculated to be ~ 12.6 J/g and 12.9 J/g, respectively. The similar ΔHrelax indicates that no rejuvenation occurs for the sample prepared at high casting temperature (HT samples).

Figure 2a, b shows the bright-field TEM images of both As-cast and DCT30, respectively, which exhibits similar homogeneous maze-like amorphous structure of both samples without any crystalline phases. Figure 2c shows compressive stress-strain curves of both As-cast and DCT30 samples. No plasticization behavior is observed after DCT, the fracture strength and plastic strain for both samples are about 2000 MPa and 0.3%, respectively. The detailed data of compression test are summarized in Table 1.
Fig. 2
Fig. 2

a, b Bright-field TEM images of As-cast and DCT30 samples cast at HT. c Compressive stress-strain curves of As-cast and DCT30 samples cast at HT

Table 1

A summary of thermal and mechanical data for the sample in this work


Tg (K)

Tx (K)

tx (min)

ΔHrelax (J·g−1)

E (GPa)

σf (MPa)

σy (MPa)

εf (%)

εp (%)



690 ± 5

780 ± 4

12.6 ± 0.2

12.6 ± 0.5

105 ± 5

2027 ± 15

1865 ± 22

2.3 ± 0.2

0.5 ± 0.2


688 ± 4

781 ± 5

12.5 ± 0.3

12.9 ± 0.3

114 ± 4

1983 ± 20

1873 ± 15

1.9 ± 0.1

0.2 ± 0.1



695 ± 5

781 ± 3

13.9 ± 0.5

10.7 ± 0.2

123 ± 5

1998 ± 18

1765 ± 18

4.3 ± 0.2

2.8 ± 0.2


697 ± 3

774 ± 5

14.2 ± 0.3

13.0 ± 0.3

107 ± 6

2049 ± 19

1640 ± 13

5.9 ± 0.3

4.3 ± 0.3

Tg glass transition temperature, Tx onset crystallization temperature, tx incubation time of crystallization, ΔHrelax enthalpy of relaxation, E Young’s modulus, σf fracture stress, σy yielding stress, εf fracture strain, εp plastic strain

Our previous study on the rejuvenation behavior of Zr55Cu30Al10Ni5 (at.%) BMG upon DCT has shown that the intrinsic core-shell heterogeneity is the main reason of rejuvenation during cyclically cooling and heating. The different elastic modulus of core and shell generates internal stress upon DCT, which causes the evolution of core region with more induced free volume [11]. Many researches have shown that the intrinsic heterogeneity of amorphous phase is related with the glass forming ability (GFA) of the alloy system [16, 17]. The BMG with a higher GFA possesses a more heterogeneous microstructure and subsequently causes rejuvenation upon DCT. However, for the sample in the present study, Zr50Cu40Al10 (at.%), the GFA is not as high as Zr55Cu30Al10Ni5 (at.%) [18, 19], thus, the more homogenous microstructure of Zr50Cu40Al10 cannot generate effective internal stress to rejuvenate the sample upon DCT.

Rejuvenation Behavior of LT Samples

Figure 3a shows the XRD patterns of both As-cast and DCT30 for LT samples, which are cast from a lower casting temperature (LT). Similar to HT samples, only a broad peak without any crystalline peaks is detected for each sample. The Tg and Tx are also very close, as shown in Fig. 3b. However, the incubation time of crystallization for DCT30 is longer than that of As-cast sample (Fig. 3c), which is different from HT samples. Furthermore, the enthalpy of relaxation for both samples, which are calculated based on the data from Fig. 3d, shows a higher value of DCT30 than As-cast. The detailed data of thermal properties are summarized in Table 1.
Fig. 3
Fig. 3

a XRD and b DSC curves of both As-cast and DCT30 samples cast at LT. c Heat-flow as a function of time during isothermal annealing (740 K) and d specific heat of both As-cast and DCT30 samples cast at LT

Previous study has shown that once the BMGs are rejuvenated, the density decreases because of more induced free volume. The densities of both As-cast and DCT30 for HT and LT samples are measured, 6.930 ± 0.004 g/cm3 (As-cast) and 6.929 ± 0.004 g/cm3 (DCT30) for HT samples and 6.957 ± 0.004 g/cm3 (As-cast) and 6.931 ± 0.010 g/cm3 (DCT30) for LT samples. The reduced free volume (x) can be calculated based on densities [11, 12]:
$$ x=\frac{v_f}{\gamma {v}^{\ast }}=\frac{2\left({\rho}_c-\rho \right)}{\rho }, $$
where vf is the average free volume per atom, γ is the correction term for the free volume overlap, v* is the critical value of free volume for atomic diffusion, ρ is the density of the sample, and ρc is the density of a sufficiently crystallized sample, herein measured to be 6.971 ± 0.002 g/cm3 (annealed at 923 K for 3 h). Thus, x for HT samples can be calculated with Eq. (2), 1.18% for As-cast and 1.21% for DCT30. The similar value indicates that no more free volume has been induced upon DCT and no rejuvenation occurs for HT samples. For LT samples, the densities include both amorphous phase and nano-clusters. However, the calculation of x should base on the density of monolithic amorphous phase. Thus, we further calculate the density of amorphous phase in LT samples by using the rule of mixture as follows [20]:
$$ \rho ={\rho}_a{V}_a+{\rho}_{nc}{V}_{nc}, $$
where ρ is the total density, and ρa and ρnc are the densities of the glassy phase and nano-clusters, respectively. Va and Vnc are the volume fractions of the glassy phase and nano-clusters, respectively. To calculate ρa, the volume fraction of nano-clusters (Vnc) should be clarified. To evaluate the Vnc, we measured the crystallization enthalpy (ΔHs) by DSC from Fig. 3b (the area of exothermic crystallization peak). Thus, Vnc can be calculated as [21] follows:
$$ {V}_{nc}=1-\frac{{\Delta H}_s}{{\Delta H}_r}, $$

where ΔHr is the crystallization enthalpy of the fully amorphous state and here we used the data of As-cast of HT sample (44.5 J/g). ΔHs of As-cast and DCT30 are 41.0 and 40.7 J/g, respectively. Thus, Vnc are calculated to be 7.8% and 8.5% for As-cast and DCT30, respectively. The similar Vnc before and after DCT indicates that the nano-clusters are stable and maintain no change upon DCT. In addition, the nano-clusters in LT samples may be B2-CuZr phase and thus ρnc is about 7.45 g/cm3 [22, 23]. By using the data shown above with Eqs. (2) and (3), x of As-cast and DCT30 are calculated to be 1.30% and 2.06%, respectively, which suggests that more free volume has been induced for LT samples upon DCT and the BMGs are rejuvenated. It agrees well with the results from thermal analysis.

These results suggest that unlike HT samples, LT samples can be rejuvenated upon DCT. Figure 4a shows the compressive stress-strain curves of both As-cast and DCT30 samples which are fabricated at a low casting temperature (LT). Firstly, unlike HT As-cast sample, the LT As-cast sample shows obvious yielding and plasticity, which fractures at about 2000 MPa with 2.8% plastic strain. Furthermore, the DCT samples show better mechanical properties than As-cast samples, including higher fracture strength (~ 2050 MPa) and larger plastic strain (~ 4.3%). The rejuvenated state of DCT30 contributes to the improvement of plasticity, which induces more free volume and subsequently more shear transformation zone (shear bands) are activated or formed to accommodate the overall deformation [24]. The detailed data of compression test are summarized in Table 1.
Fig. 4
Fig. 4

a Compressive stress-strain curves of As-cast and DCT30 samples cast at LT. b, c Bright-field TEM images of As-cast and DCT30 samples cast at LT

The homogenous amorphous structure in HT samples cannot generate internal stress to rejuvenate themselves. In the contrary, the LT samples which have the same composition and cooling rate (same size of sample) can be rejuvenated upon DCT. This difference should originate from the microstructure. Figure 4b, c shows the TEM images of As-cast and DCT30 which are cast at low temperature, respectively. Apparently, very fine nano-sized clusters can be observed for both samples, which is different from the structure of HT sample shown in Fig. 2a, b.

Figure 5 shows the schematic illustration of rejuvenation behavior for both HT and LT samples. The HT sample possesses a quite homogeneous amorphous phase, thus no internal stress is generated upon DCT and therefore no rejuvenation occurs for HT samples. In the contrast, the nano-sized heterogeneity in LT samples should help generate the internal stress upon DCT because of the different intrinsic properties between two phases. Finally, LT samples can be rejuvenated. The internal stress (σα) can be calculated as [25] follows:
$$ {\sigma}_{\alpha }=\Delta \alpha \Delta T\frac{2{E}_c{E}_a}{\left(1+{v}_a\right){E}_c+2\left(1-2{v}_c\right){E}_a}, $$
Fig. 5
Fig. 5

Schematic illustration of rejuvenation behavior for both HT and LT samples. Homogeneous structure of HT sample cannot generate internal stress upon DCT, while heterogeneity in LT samples helps generate internal stress at the interfaces. Therefore, rejuvenation behavior can be only observed in LT samples

where Δα is the thermal expansion coefficient differences between the amorphous and crystalline phases, ΔT is the temperature change, Ec and Ea are the elastic modulus for the crystalline and amorphous phases, respectively, and νc and νa are the Poisson’s ratio for crystalline and amorphous phases, respectively. Previous study has shown that the nano-clusters may be B2-CuZr phase [22]. The thermal expansion coefficients for the amorphous and crystalline phases have been reported to be ~ 1.3 × 10−5 K−1 and 1.14 × 10−5 K−1, respectively [26], Ec and Ea have been reported to be ~ 77 and 123 GPa, respectively [27], and νc and νa have been reported to be ~ 0.385 and 0.383, respectively [28, 29]. ΔT was ~ 180 K (293 K to 113 K). Thus, by using Eq. (5), σα is calculated to be ~ 34 MPa, which causes local atomic rearrangement and also helps to rejuvenate the amorphous phase.

As the intrinsic heterogeneity of BMGS can affect the rejuvenation behavior of BMGs upon following thermal treatment, the reason why different casting temperatures can tailor the microstructures should be clarified. Zhu et al. have also found that the casting temperature can tailor the structure from fully amorphous state (at high casting temperature) to composite structure (at low casting temperature) [30]. When the metallic liquid is quenched from high temperature, the element in the liquid can be fully mixed and makes the liquid more homogenous. Thus, fully amorphous phase can be obtained. However, if the casting temperature is low, the element segregation can occur in very local area among the liquid, which are retained during the solidification. This segregation is considered to be the nuclei for the nano-clusters in LT samples. Furthermore, if the casting temperature is very low, we cannot produce amorphous samples even with high cooling rate. Therefore, varying the casting temperature can induce nano-sized heterogeneity in the amorphous matrix, which generates internal stress and rejuvenation during DCT.


In the present study, the rejuvenation behaviors of Zr50Cu40Al10 (at.%) BMGs upon DCT have been investigated. At high casting temperature, for the fully mixing of elements, fully amorphous phase with quite homogeneous structure can be fabricated after quenching. No rejuvenation occurs for these samples because of the lack of internal stress during cyclically cooling and heating. In the contrary, at low casting temperature, for the element segregation, nano-cluster dispersed amorphous structure can be observed, which generates high internal stress and causes the rejuvenation of samples upon DCT. The rejuvenated sample with more free volume shows better plasticity than As-cast ones. These findings provide a novel method to tailor the microstructure of as-cast BMG samples, which affects both the mechanical properties and rejuvenation behavior during the following DCT treatment.



Bulk metallic glass


Deep cryogenic cycling treatment


Thermal treated with 30 cycles


Differential scanning calorimeter


Glass forming ability


High casting temperature


Low casting temperature


Transmission electron microscope


X-ray diffraction



W. Guo is grateful for the financial support of start-up fund (No. 3004110125) from Huazhong University of Science and Technology


This work was supported by Huazhong University of Science and Technology under Grant [number 3004110125].

Availability of Data and Materials

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Authors’ Contributions

Conceptualization, WG and JS; methodology, WG; validation, WG, JS; formal analysis, WG; investigation, SW.; resources, JS and SW; writing—original draft preparation, WG; writing—review and editing, JS; supervision, JS and SW; project administration, WG; funding acquisition, WG and SW. All authors read and approved the final manuscript.

Competing Interests

The authors declare that they have no competing interests.

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Authors’ Affiliations

State Key Lab of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, China
Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan


  1. Wang WH, Dong C, Shek CH (2004) Bulk metallic glasses. Mater Sci Eng R 44:45–89View ArticleGoogle Scholar
  2. Guo W, Kato H (2015) Development and microstructure optimization of Mg-based metallic glass matrix composites with in situ B2-NiTi dispersoids. Mater Des 83:238–248View ArticleGoogle Scholar
  3. Guo W, Kato H, Yamada R, Saida J (2017) Fabrication and mechanical properties of bulk metallic glass matrix composites by in-situ dealloying method. J Alloy Compd 707:332–336View ArticleGoogle Scholar
  4. Greer AL (1995) Metallic glasses. Science 267:1947–1953View ArticleGoogle Scholar
  5. Guo W, Wada T, Kato H (2016) Mater Lett 183:454–458View ArticleGoogle Scholar
  6. Guo W, Saida J (2017) Triple-yieldable multiphase reinforced bulk metallic glass matrix composites under tension. Mater Lett 191:42–45View ArticleGoogle Scholar
  7. Heuer A (1997) Properties of a glass-forming system as derived from its potential energy landscape. Phys Rev Lett 78:4051–4054View ArticleGoogle Scholar
  8. Saida J, Yamada R, Wakeda M (2013) Recovery of less relaxed state in Zr-Al-Ni-Cu bulk metallic glass annealed above glass transition temperature. Appl Phys Lett 103:221910View ArticleGoogle Scholar
  9. Ramamurty U, Lee ML, Basu J, Li Y (2002) Embrittlement of a bulk metallic glass due to low-temperature annealing. Scripta Mater 47:107–111View ArticleGoogle Scholar
  10. Dudina DV, Mali VI, Anisimov AG, Lomovsky OI, Korchagin MA, Bulina NV, Neklyudova MA, Georgarakis K, Yavari AR (2011) Crystallization of Ti33Cu67 metallic glass under high-current density electrical pulses. Nanoscale Res Lett 6:512View ArticleGoogle Scholar
  11. Guo W, Yamada R, Saida J (2018) Rejuvenation and plasticization of metallic glass by deep cryogenic cycling treatment. Intermetallics 93:141–147View ArticleGoogle Scholar
  12. Guo W, Yamada R, Saida J, Lü SL (2018) Wu SS. Thermal rejuvenation of a heterogeneous metallic glass. J Non-Cryst Solids 498:8–13View ArticleGoogle Scholar
  13. Meng FQ, Tsuchiya K, Li S, Yokoyama Y (2012) Reversible transition of deformation mode by structural rejuvenation and relaxation in bulk metallic glass. Appl Phys Lett 101:121914View ArticleGoogle Scholar
  14. Ketov SV, Sun YH, Nachum S, Lu Z, Checchi A, Beraldin AR, Bai HY, Wang WH, Louzguine-Luzgin DV, Carpenter MA, Greer AL (2015) Rejuvenation of metallic glasses by non-affine thermal strain. Nature 524:200View ArticleGoogle Scholar
  15. Guo W, Yamada R, Saida J (2017) Unusual plasticization for structural relaxed bulk metallic glass. Mater Sci Eng A 699:81–87View ArticleGoogle Scholar
  16. Fujita T, Konno K, Zhang W, Kumar V, Matsuura M, Inoue A, Sakurai T, Chen MW (2009) Atomic-scale heterogeneity of a multicomponent bulk metallic glass with excellent glass forming ability. Phys Rev Lett 103:075502View ArticleGoogle Scholar
  17. Fan HY, Liu XJ, Wang H, Wu Y, Wang H, Lu ZP (2017) Mechanical heterogeneity and its relation with glass-forming ability in Zr-cu and Zr-cu-Al metallic glasses. Intermetallics 90:159–163View ArticleGoogle Scholar
  18. Yokoyama Y, Fredriksson H, Yasuda H, Nishijima M, Inoue A (2007) Glassy solidification criterion of Zr50Cu40Al10 alloy. Mater Trans 48:1363–1372View ArticleGoogle Scholar
  19. Castellero A, Bossuyt S, Stoica M, Deledda S, Eckert J, Chen GZ, Fray DJ, Greer AL (2006) Improvement of the glass-forming ability of Zr55Cu30Al10Ni5 and Cu47Ti34Zr11Ni8 alloys by electro-deoxidation of the melts. Scripta Mater. 55:87–90View ArticleGoogle Scholar
  20. Ma LL, Wang L, Xue YF, Wang YD, Li N, Ren Y, Zhang HF, Wang AM (2011) An in situ high-energy X-ray diffraction study of micromechanical behavior of Zr-based metallic glass reinforced porous W matrix composite. Mater Sci Eng A 530:344–348View ArticleGoogle Scholar
  21. Mondal K, Ohkubo T, Toyama T, Nagai Y, Hasegawa M, Hono K (2008) Acta Mater 56:5329–5339View ArticleGoogle Scholar
  22. Meng FQ, Tsuchiya K, Yin FX, Li S, Yokoyama Y (2012) Influence of Al content on martensitic transformation behavior in Zr50Cu50−xAlx. J Alloy Compd 522:136–140View ArticleGoogle Scholar
  23. Pauly S, Gorantla S, Wang G, Kühn U, Eckert J (2010) Nat Mater 9:473–477View ArticleGoogle Scholar
  24. Li N, Liu L, Chen Q, Pan J, Chan KC (2007) The effect of free volume on the deformation behavior of a Zr-based metallic glass under nanoindentation. J Phys D Appl Phys 40:6055–6059View ArticleGoogle Scholar
  25. Ling Z, Wu YL (2007) Thermal residual stresses in particulate composites and its toughening effect. J Mater Sci 42:759–762View ArticleGoogle Scholar
  26. Yamada R, Tanaka N, Guo W, Saida J (2017) Crystallization behavior of thermally rejuvenated Zr50Cu40Al10 metallic glass. Mater Trans 58:1463–1468View ArticleGoogle Scholar
  27. Arsenault RJ, Taya M (1987) Thermal residual stress in metal matrix composite. Acta Metall 3:651–659View ArticleGoogle Scholar
  28. Yokoyama Y, Yamasaki T, Liaw PK, Buchanan RA, Inoue A (2007) Glass-structure changes in tilt-cast Zr-Cu-Al glassy alloys. Mater Sci Eng A 449-451:621–626View ArticleGoogle Scholar
  29. Kato H, Chen HS, Inoue A (2008) Relationship between thermal expansion coefficient and glass transition temperature in metallic glasses. Scripta Mater. 58:1106–1109View ArticleGoogle Scholar
  30. Zhu ZW, Zhang HF, Wang H, Ding BZ, Hu ZQ, Huang H (2009) Influence of casting temperature on microstructures and mechanical properties of Cu50Zr45.5Ti2.5Y2 metallic glass prepared using copper mold casting. J Mater Res 24:3108–3115View ArticleGoogle Scholar


© The Author(s). 2018