首页> 外文会议>International Conference on Diffusion, Segregation and Stresses in Materials, May 27-31, 2002, Moscow, Russia >Stress, Surface Energy and Segregation Effects in Liquid Metal Embrittlement: Role of Grain Boundary Grooving Accelerated by Local Plasticity
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Stress, Surface Energy and Segregation Effects in Liquid Metal Embrittlement: Role of Grain Boundary Grooving Accelerated by Local Plasticity

机译:液态金属脆化中的应力,表面能和偏析效应:局部塑性在晶粒边界开槽中的作用

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摘要

We summarize briefly the stress intensity, surface energy and GB segregation effects in liquid metal embrittlement (LME) crack kinetics and the explanations that have been put forward. A new kinetic mechanism of LME is outlined. It is proposed that GB cracks propagate by Mullins grooving controlled by diffusion in liquid and dramatically accelerated by periodic blunting of the groove tip by local plastic flow. It is found that this Grooving Accelerated by Local Plasticity (GALOP) model fits the major experimental observations fairly well.
机译:我们简要总结了液态金属脆化(LME)裂纹动力学中的应力强度,表面能和GB偏析效应,并提出了解释。概述了LME的新动力学机理。建议GB裂纹通过在液体中扩散控制的Mullins开槽而扩展,并通过局部塑性流动周期性地钝化凹槽尖端而大大加速。发现这种由局部可塑性加速的开槽(GALOP)模型非常符合主要的实验观察结果。

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