EFFECTS OF DEVITRIFICATION ON THE MECHANICAL-PROPERTIES OF CU46ZR54 METALLIC GLASS

被引：13

作者：

FREED, RL ^{[1
]}

VANDERSANDE, JB ^{[1
]}

机构：

[1] MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1979年 / 10卷 / 11期

关键词：

D O I：

10.1007/BF02811693

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The room temperature mechanical properties of the metallic glass Cu46Zr54 have been investigated as a function of aging time at 375°C (15°C below T g). The results indicate that the tensile fracture stress and hardness of this material can be changed by such thermal processing. Fracture stress and hardness are increased with short times at temperature by structural relaxation. Also, the presence of a very small volume fraction of crystalline phase causes the shear stiffness of the material to increase markedly providing an additional increase in fracture stress and hardness. Continued devitrification causes embrittlement and the decrease of fracture stress, as predicted by the model of two-phase materials; however, hardness continues to increase, reflecting the increasing volume fraction of the harder crystalline phases. Embrittlement and decreasing fracture stress are enhanced by the stress concentration effect at the crystallites which causes void formation and growth. © 1979 American Society for Metals and the Metallurgical Society of AIME.

引用

页码：1621 / 1626

页数：6

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