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首页> 外文会议>International Conference on Fracture >Study of Liquid Metal Embrittlement of steels by EBSD July 12-17, 2009 Ottawa, Ontario, Canada
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Study of Liquid Metal Embrittlement of steels by EBSD July 12-17, 2009 Ottawa, Ontario, Canada

机译：2009年7月12日至17日EBSD钢材液态金属脆化研究2009年渥太华，安大略省，加拿大

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Liquid metal embrittlement (LME) of steels is of renewed interest in the framework of nuclear reactors and spallation neutron sources projects using liquid metals as coolant. The structural materials for these systems are selected according to their resistance to liquid metal corrosion, irradiation embrittlement and compatibility with the coolant. These stringent constraints leave two classes of materials, austenitic steels and martensitic/ferritic steels. The reference materials for these systems are the 316L austenitic steel and the T91 martensitic steel, a modified 9Cr 1Mo alloy. LME of these materials in contact with mercury (Hg) and (PbBi) has been demonstrated in various works [1,2]. The fracture mode proceeds either by cleavage or by shear cracking depending upon the geometry and the mechanical solicitation (mode I or mixed mode II/III). A fracture mechanics approach (J-8a) has been developed in plane stress with thin sheets allowing to a good approximation a measurement of the crack length by optical means. Indeed one of the difficulties of fracture mechanics with a liquid metal environnement is the fact that the medium is opaque and conductive. This adaptation of fracture mechanics reduces the propagation problem to a quasi-2D problem. It showed that the liquid metal reduces the energy required for crack extension by 30 to 50% supporting the case for LME [3]. The mechanism of LME in general is still a matter of debate and it is the purpose of this paper to report a study of cracking induced by a liquid metal by Electron Back Scattering Diffraction (EBSD).
机译：钢材的液态金属脆化（LME）在核反应堆框架和使用液态金属作为冷却剂的浇注中子源项目的重新感兴趣。根据其对液态金属腐蚀，照射脆化和与冷却剂的相容性选择这些系统的结构材料。这些严格的约束留下了两类材料，奥氏体钢和马氏体/铁素体钢。这些系统的参考材料是316L奥氏体钢和T91马氏体钢，改性的9CR 1MO合金。这些材料的LME在各种作品中已经证明了与汞（HG）和（PBBI）接触的材料[1,2]。根据几何形状和机械征集（模式I或混合模式II / III），断裂模式通过裂解或通过剪切裂缝进行。裂缝力学方法（J-8A）已经在平面应力中开发，薄片允许通过光学手段良好地近似裂缝长度的测量。实际上，具有液态金属环境的裂缝力学的困难之一是介质是不透明和导电的事实。这种裂缝力学的适应将传播问题降低到准2D问题。它表明，液态金属降低了裂缝延伸所需的能量30至50％，支持LME的情况[3]。 LME一般的机制仍然是辩论问题，本文的目的是通过电子背散射衍射（EBSD）报告由液态金属诱导的裂缝研究的研究。

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