Temperature Effect on Fracture of a Zr-Based Bulk Metallic Glass

被引：6

作者：

Yang, Na ^{[1
,2
]}

Yi, Jun ^{[2
]}

Yang, Yu Hang ^{[2
]}

Huang, Bo ^{[2
]}

Jia, Yan Dong ^{[2
]}

Kou, Sheng Zhong ^{[1
]}

Wang, Gang ^{[2
]}

机构：

[1] Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China

[2] Shanghai Univ, Sch Mat Sci & Engn, Inst Mat, Shanghai 200444, Peoples R China

来源：

MATERIALS | 2020年 / 13卷 / 10期

基金：

中国国家自然科学基金;

关键词：

bulk metallic glass; toughness; relaxation; shear band; SECONDARY RELAXATION; ULTRAHIGH STRENGTH; FATIGUE ENDURANCE; BEHAVIOR; TOUGHNESS; DEFORMATION;

D O I：

10.3390/ma13102391

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Bulk metallic glass (BMGs) is highly expected for applications in engineering structures due to their superior mechanical properties. The fracture toughness of some BMGs was investigated at cryogenic and at elevated temperatures. However, the mechanism of the temperature-dependence of BMG toughness still remains elusive. Here, we characterized the fracture toughness of Zr61Ti2Cu25Al12 BMG prepared with Zr elemental pieces with low Hf content at temperatures ranging from 134 to 623 K. The relaxation spectrum of the BMG was characterized by a dynamic mechanical analysis using the same temperature range. We found that the BMG is tougher at onset temperatures of the relaxation processes than at peak temperatures. The temperature-dependent fracture toughness of the BMG is strongly dependent on its relaxation spectrum.

引用

页数：9

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