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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Liquid metal embrittlement of T91 and 316L steels by heavy liquid metals: A fracture mechanics assessment
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Liquid metal embrittlement of T91 and 316L steels by heavy liquid metals: A fracture mechanics assessment

机译：重金属对T91和316L钢的金属脆性：断裂力学评估

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摘要

LME of the martensitic T91 and the austenitic 316L steels have been investigated in the CCT geometry in the plane-stress condition. Using such a geometry, premature cracking induced by a liquid metal (PbBi and Hg) can be studied using a fracture mechanics approach based on CTOD, J-Delta a and fracture assessment diagram. One is able to measure a reduction of the crack tip blunting and a reduction of the energy required for crack propagation induced by the liquid metal. In spite of some limitations, this qualitative evaluation shows that liquid metals do not induce strong embrittlement on steels in plane-stress condition. Rather, the effect of the liquid metal seems to promote a fracture mode by plastic collapse linked with strain localization. It indicates that the materials, in spite of a potential embrittlement, should still be acceptable in terms of safety criteria. (c) 2008 Elsevier B.V. All rights reserved.
机译：马氏体T91和奥氏体316L钢的LME已在平面应力条件下的CCT几何中进行了研究。使用这种几何形状，可以使用基于CTOD，J-Δa和断裂评估图的断裂力学方法研究由液态金属（PbBi和Hg）引起的过早裂纹。一个人能够测量出裂纹尖端钝化的减少和由液态金属引起的裂纹扩展所需的能量的减少。尽管有一些限制，但这种定性评估表明，在平面应力条件下，液态金属不会引起钢的强烈脆化。而是，液态金属的作用似乎通过与应变局部化有关的塑性塌陷促进了断裂模式。它表明，尽管存在潜在的脆性，但这些材料仍应在安全标准方面可以接受。 （c）2008 Elsevier B.V.保留所有权利。

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