New Class of Plastic Bulk Metallic Glass

作者：Lianyi Chen, Zongwen Fu, G. Q. Zhang, Xiuhong Hao, Q.K. Jiang, X.D. Wang, Q.P. Cao, H. Franz, Y. G. Liu, Hui Xie, S. L. Zhang, Baoyi Wang, Yue Zeng, J.Z. Jiang · 发表于：Physical Review Letters · 年份：2008 · DOI：10.1103/physrevlett.100.075501 · 被引用次数：214 · 研究领域：Metallic Glasses and Amorphous Alloys

An intrinsic plastic Cu(45)Zr(46)Al(7)Ti(2) bulk metallic glass (BMG) with high strength and superior compressive plastic strain of up to 32.5% was successfully fabricated by copper mold casting. The superior compressive plastic strain was attributed to a large amount of randomly distributed free volume induced by Ti minor alloying, which results in extensive shear band formation, branching, interaction and self-healing of minor cracks. The mechanism of plasticity presented here suggests that the creation of a large amount of free volume in BMGs by minor alloying or other methods might be a promising new way to enhance the plasticity of BMGs.