Influence of material state at a crack tip on the process of fatigue striations formation for Al-based alloys

被引：0

作者：

Shaniavski, AA ^{[1
]}

机构：

[1] State Ctr Flight Safety Civil Aviat, Moscow 103340, Russia

来源：

ADVANCES IN MECHANICAL BEHAVIOUR, PLASTICITY AND DAMAGE, VOLS 1 AND 2, PROCEEDINGS | 2000年

关键词：

fatigue striations; Al-alloys; Acoustic Emission; quantitative fractography;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fatigue fracture features such as pseudo- and fatigue striations were investigated for the Al-alloys AL=Cu=Mg and Acoustic Emission (AE) was used to analyze plastic deformation processes ahead of a crack tip. Dramatic change of fatigue striations spacing in-time was demonstrated in accordance with AE-signals evolution. Specimens with fatigue crack have not macroscopic significance in plastic deformation process under tension up to the fast fracture when striation spacing is over 2.1x10(-7) m. Mechanisms of material deformation and fracture around of a crack tip during fatigue striations formation process are discussed on the bases of the synergistic approach.

引用

页码：961 / 966

页数：6

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