FRACTURE-TOUGHNESS OF QUATERNARY AL-LI-CU-MG ALLOY UNDER MODE-I, MODE-II, AND MODE-III LOADING CONDITIONS

被引：0

作者：

PRASAD, NE ^{[1
]}

KAMAT, SV ^{[1
]}

MALAKONDAIAH, G ^{[1
]}

KUTUMBARAO, VV ^{[1
]}

机构：

[1] BANARAS HINDU UNIV, INST TECHNOL,DEPT MET ENGN, VARANASI 221005, UTTAR PRADESH, INDIA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1994年 / 25卷 / 11期

关键词：

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fracture toughness under mode I, mode II, and mode III loading conditions was evaluated for a quaternary 8090 Al-Li-Cu-Mg alloy in underaged and peak-aged conditions. The effect of aging was found to be significantly different for different loading conditions. The alloy in the underaged (T3) condition exhibited minimum fracture toughness under mode II loading, whereas mode I fracture toughness was the lowest in the case of the peak-aged (T8E51)condition. Significant anisotropy in the fracture resistance is observed only in case of the peakaged alloy under mode I loading, whereas in all other cases, the fracture resistance is found to be isotropic. The fracture mode was transgranular shear in all three modes of loading in the underaged condition as well as under mode II and mode III loading in the peak-aged condition. The alloy exhibited ductile intergranular fracture under mode I loading in the peak-aged condition. The results obtained are explained on the basis of these dominant fracture mechanisms prevalent under different loading conditions.

引用

页码：2439 / 2452

页数：14

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