Glass-forming ability, phase formation and mechanical properties of glass-forming Cu-Hf-Zr alloys

被引：0

作者：

K.Kosiba ^{[1
]}

Kaikai Song ^{[2
]}

U.Kühn ^{[1
]}

Gang Wang ^{[3
]}

S.Pauly ^{[1
]}

机构：

[1] Leibniz IFW Dresden, Institute for Complex Materials

[2] School of Mechanical, Electrical & Information Engineering, Shandong University (Weihai)

[3] Laboratory for Microstructures, Institute of Materials, Shanghai University

来源：

Progress in Natural Science:Materials International | 2019年 / 29卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Metallic glasses; Glass-forming ability; Composites; Continuous cooling transformation (CCT) diagram; Mechanical properties;

D O I：

暂无

中图分类号：

TG139.8 [];

学科分类号：

080502 ;

摘要：

The influence of Hf additions on the glass-forming ability（GFA）,phase formation and mechanical properties of Cu;Hf;Zr;（x=2,5,10,20 at.%）alloys has been systematically investigated.We report on a distinct correlation between phase formation and GFA of Cu;Zr;-based alloys.Increasing additions of Hf reduce the thermal stability of the high-temperature B2Cu（Hf,Zr）phase,while the thermal stability of the corresponding undercooled melt is enhanced.The GFA of these alloy series gradually raises up to 10 at.%Hf,whereas at 20 at.%Hf,the GFA is drastically lowered,since the B2Cu（Hf,Zr）phase becomes unstable and the precipitation of the lowtemperature equilibrium phases is favoured.This interrelation determines the microstructure and results in the formation of Cu-Hf-Zr-based bulk metallic glass composites.These composites not only show appreciable macroscopic plastic strain,but also high yield strength.

引用

页码：576 / 581

页数：6