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首页> 外文期刊>Journal of Materials Engineering and Performance >Residual stress characterization in structural materials by destructive and nondestructive techniques
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Residual stress characterization in structural materials by destructive and nondestructive techniques

机译：利用破坏性和非破坏性技术表征结构材料中的残余应力

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Transmutation of nuclear waste is currently being considered to transform long-lived isotopes to species with relatively short half-lives and reduced radioactivity through capture and decay of minor actinides and fission products. This process is intended for geologic disposal of spent nuclear fuels for shorter durations in the proposed Yucca Mountain repository. The molten lead-bismuth-eutectic will be used as a target and coolant during transmutation, which will be contained in a subsystem vessel made from materials such as austenitic (304L) and martensitic (EP-823 and HT-9) stainless steels. The structural materials used in this vessel will be subjected to welding operations and plastic deformation during fabrication. The resultant residual stresses cannot be totally eliminated even by stress-relief operations. Destructive and nondestructive techniques have been used to evaluate residual stresses in the welded and cold-worked specimens. Results indicate that tensile residual stresses were generated at the fusion line of the welded specimens made from either austenitic or martensitic stainless steel, with reduced stresses away from this region. The magnitude of residual stress in the cold-worked specimens was enhanced at intermediate cold-reduction levels, showing tensile residual stresses in the austenitic material while exhibiting compressive stresses in the martensitic alloys. Comparative analyses of the resultant data obtained by different techniques revealed consistent stress patterns.
机译：目前正在考虑通过核废物的mut变将长寿命同位素转变为半衰期相对较短，并通过捕获和降解次of系元素和裂变产物而降低放射性的物种。此过程旨在在拟议的尤卡山处置库中以较短的时间进行废弃核燃料的地质处置。熔融的铅-铋-共晶将在转变过程中用作目标和冷却剂，它们将包含在由奥氏体（304L）和马氏体（EP-823和HT-9）不锈钢等材料制成的子系统容器中。该容器中使用的结构材料将在制造过程中经受焊接操作和塑性变形。即使通过应力消除操作也无法完全消除所产生的残余应力。破坏性和非破坏性技术已用于评估焊接和冷加工样品中的残余应力。结果表明，在由奥氏体或马氏体不锈钢制成的焊接试样的熔合线处产生拉伸残余应力，并且远离该区域的应力减小。冷加工试样的残余应力大小在中间的冷轧降低水平上有所提高，在奥氏体材料中表现出拉伸残余应力，而在马氏体合金中表现出压缩应力。通过不同技术获得的结果数据的比较分析显示出一致的应力模式。

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