Microstructure Evolution of Zr₅₀Cu₁₈Ni₁₇Al₁₀Ti₅ Bulk Metallic Glass during Cold-rolling

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• 作者：Honghong Yan ; Yong Hu ; Zhijie Yan ; Xiaohua Zheng ; Yongtang Li
• 关键词：Metallic glasses ; Cold-rolling ; Microstructure
• 刊名：Journal of Materials Science & Technology
• 出版年：2012
• 出版时间：August, 2012
• 年：2012
• 卷：28
• 期：8
• 页码：756-760
• 全文大小：1798 K

文摘

Zr₅₀Cu₁₈Ni₁₇Al₁₀Ti₅ bulk metallic glass has been rolled at room temperature up to 95 % in thickness reduction, and the dependence of microstructure on the strain was investigated. With increasing thickness reduction, the full width at half maximum (FWHM) and crystallization enthalpy decrease gradually till 80 % , and then increase evidently at 95 % . It is revealed that the reversible transition between the ordered and disordered atomic configurations was found in the metallic glass as the deformation proceeds, which is further verified by the high-resolution transmission electron microscopy images. The final microstructure in metallic glass during cold-rolling is the net result of two competing processes between shear-induced disordering and diffusion controlled reordering.