CHARACTERISTICS AND MICROSTRUCTURE IN THE EVOLUTION OF SHEAR LOCALIZATION IN TI-6AL-4V ALLOY

被引：70

作者：

BAI, YL ^{[1
]}

XUE, Q ^{[1
]}

XU, YB ^{[1
]}

SHEN, LT ^{[1
]}

机构：

[1] CHINESE ACAD SCI, INST MET RES, FATIGUE & FRACTURE MAT LAB, SHENYANG 110015, PEOPLES R CHINA

来源：

MECHANICS OF MATERIALS | 1994年 / 17卷 / 2-3期

关键词：

D O I：

10.1016/0167-6636(94)90056-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new interrupting method was proposed and the split Hopkinson torsional bar (SHTB) was modified in order to eliminate the effect of loading reverberation on post-mortem observations. This makes the comparative study of macro- and microscopic observations on tested materials and relevant transient measurement of tau - gamma curve possible. The experimental results of the evolution of shear localization in in Ti-6Al-4V alloy studied with the modified SHTB are reported in the paper. The collapse of shear stress seems to be closely related to the appearance of a certain critical coalescence of microcracks. The voids may form within the localized shear zone at a quite early stage. Finally, void coalescence results in elongated cavities and their extension leads to fracture along the shear band.

引用

页码：155 / 164

页数：10

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