ROLE OF MICROSTRUCTURE IN HYDROGEN-ASSISTED FRACTURE OF 7075 ALUMINUM

被引：88

作者：

ALBRECHT, J ^{[1
]}

THOMPSON, AW ^{[1
]}

BERNSTEIN, IM ^{[1
]}

机构：

[1] CARNEGIE MELLON UNIV,DEPT MET & MAT SCI,PITTSBURGH,PA 15213

来源：

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

关键词：

D O I：

10.1007/BF02811712

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Underaged, peak strength (T6), and overaged (T73) microstructures were studied in 7075 plate material. Hydrogen charged and uncharged tensile specimens of longitudinal orientation were tested between -196°C and room temperature. The results confirm a hydrogen embrittlement effect, manifested mainly in the temperature dependence of the reduction of area loss; a classical behavior of hydrogen embrittlement. The maximum embrittlement shifted to lower temperatures with further aging. The effect of hydrogen was largest for the underaged condition and smallest for the overaged, thus following the pattern found for the sensitivity to stress-corrosion cracking in high strength aluminum alloys. The fracture path was predominantly transgranular, with minor amounts of intergranular fracture. © 1979 American Society for Metals and the Metallurgical Society of AIME.

引用

页码：1759 / 1766

页数：8

共 44 条

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