Fracture behaviour of high strength unworked Al alloys

C. Chen, F. Ramberg, J. Evensen
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引用次数: 3

Abstract

Abstract In this investigation attention was focused on the fracture behaviour of some high strength aluminium alloys in the as-cast and heat treated condition. Fracture is initiated in constituent particles located at grain or dendrite boundaries, and propagates in an intergranular manner. Crack initiation occurs independently of temper condition at a critical stress of about 1000 MN m−2. Fracture toughness varies between 17 and 25 MN m−3/2 depending upon aging condition. The measured toughness can be explained in terms of the critical decohesion stress, the yield stress, and the volume (or distance) over which the critical decohesion stress is exceeded.
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高强度未加工铝合金的断裂行为
本文主要研究了几种高强度铝合金在铸态和热处理状态下的断裂行为。断裂始于位于晶界或枝晶界的组成颗粒,并以晶间方式扩展。当临界应力约为1000 MN m−2时,裂纹的萌生与回火条件无关。断裂韧性在17 ~ 25mn m−3/2之间,取决于时效条件。测量的韧性可以用临界脱黏应力、屈服应力和超过临界脱黏应力的体积(或距离)来解释。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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