MECHANICAL PROPERTY OF A NEW Zr-BASED BULK METALLIC GLASS WITH CERTAIN PLASTICITY AT LOW TEMPERATURE

摘要：

The mechanical property of a new bulk metallic glass Zr50.7Cu28Ni9Al12.3, which owns 5％ room-temperature plasticity, is investigated at low temperatures 193K and 123K. It is indicated that the yield strength and the plasticity significantly increase by 12.8％ and 50％ respectively as testing temperature is lowered from 298K (at room temperature) to 123K (in liquid nitrogen). The dense and multiple shear bands which contribute to the improved ductility are observed on the side surface of these samples fractured at low-temperature. Detailed study of the stress-strain curves for the samples deformed at low temperature show that more serrations and smaller stress drop form due to generation of more much shear bands.

关键词： Zr-based BMG plasticity and strength shear bands serrated flow low temperature

作者: YAJUAN SUN DONGDONG QU JUN SHEN YONGJIANG HUANG XIANSHUN WEI

作者单位: School of Materials Science and Engineering, Harbin Institute of Technology University, Harbin 150001, China

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 1331-1336

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）