TRANSGRANULAR FRACTURE OF HEAT-TREATED WELDMENTS IN A HIGH-STRENGTH ALPHA-BETA TITANIUM-ALLOY

被引：8

作者：

MAHAJAN, Y

BAESLACK, WA

机构：

[1] Air Force Materials Laboratory, Metals and Ceramics Division Wright-Patterson Air Force Base

来源：

SCRIPTA METALLURGICA | 1979年 / 13卷 / 12期

关键词：

D O I：

10.1016/0036-9748(79)90268-0

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Widmanstätten plus grain boundary alpha fusion and near heat-affected zone microstructures in heat-treated Ti-6A1-6V-2Sn weldments fractured predominantly transgranularly despite the presence of an extremely large prior-beta grain size and a nearly-continuous grain boundary alpha morphology. Crack initiation involved in highly-localized, shear-induced separation at grain boundary alpha - retained beta interfaces, with minimal slip and deformation in the grain boundary alpha. The ability of slip in grain boundary alpha to be accommodated within the grain interior prevented intense slip in the grain boundary alpha. This absence of severe grain boundary deformation and the nature of slip within the prior-beta grains promoted transgranular rather than intergranular crack propagation. © 1979.

引用

页码：1125 / 1129

页数：5

共 7 条

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