Strain distribution in Zr64.13Cu15.75Ni10.12Al10 bulk metallic glass investigated by in situ tensile tests under synchrotron radiation
Strain distribution in Zr64.13Cu15.75Ni10.12Al10 bulk metallic glass investigated by in situ tensile tests under synchrotron radiation
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DOI：
10.1063/1.2952034
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发表时间：
2008-07-01
影响因子：
3.2
通讯作者：
Eckert, J.
中科院分区：
文献类型：
--
作者：
Stoica, M.;Das, J.;Eckert, J.
利用同步辐射X射线研究了Zr 64. 13 Cu 15. 75 Ni 10. 12 Al 10块体非晶合金在拉伸载荷作用下原子尺度应变张量的演化。相同类型的样品先前在压缩载荷下进行了研究，并显示在1690 MPa下屈服，同时具有高达160%应变的大变形能力。在拉伸中，样品在1500 MPa的较低应力下断裂，没有屈服或塑性变形的迹象。没有宏观塑性下观察到的张力，从应变张量和超声波声速测量获得的弹性常数的大的差异被揭示。本文详细介绍了Zr_（64.13）Cu_（15.75）Ni_（10.12）Al_（10）合金在不同变形阶段的拉伸张量和对分布函数的测量过程和计算方法。结果进行了讨论，与其他报道的数据相比，从X射线衍射测量使用同步辐射。(c)2008年美国物理学会。
We report on the evolution of the atomic-scale strain tensor of ductile Zr64.13Cu15.75Ni10.12Al10 bulk metallic glass under tensile loading by using x-ray synchrotron radiation. The same kind of samples was previously investigated under compressive loading and revealed yielding at 1690 MPa together with large deformability of up to 160% strain. In tension the samples fracture at a lower stress, 1500 MPa, with no sign of yielding or plastic deformation. With no macroplasticity observed under tension, large differences in the elastic constants obtained from the strain tensor and from ultrasonic sound velocity measurements are revealed. This paper presents in detail the measuring procedure as well as the calculation of the tensile tensor and pair distribution functions of Zr64.13Cu15.75Ni10.12Al10 at different stages of deformation. The results are discussed in comparison with other reported data obtained from x-ray diffraction measurements using synchrotron radiation. (c) 2008 American Institute of Physics.