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首页> 外文期刊>Transactions of JWRI >FEM Simulation of Welding Residual Stress in Multi-pass Butt-welded Modified 9Cr-1Mo Steel Pipe Considering Phase Transformation Effects
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FEM Simulation of Welding Residual Stress in Multi-pass Butt-welded Modified 9Cr-1Mo Steel Pipe Considering Phase Transformation Effects

机译：考虑相变效应的9Cr-1Mo多道对接多道焊焊接残余应力的有限元模拟

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摘要

The objective of this paper is to investigate the influence of solid-state phase transformation on the evolution of residual stress distributions in butt-welded modified 9Cr-1Mo steel pipes. A thermal elastic plastic finite element model taking into account the metallurgical phase transformation was developed. Effects on welding residual stress of the volumetric change and the yield strength change due to austenite-martensite transformation were investigated by means of numerical analysis. The results show that the volumetric change and the yield strength change due to martensite transformation have large influences on the welding residual stress. In the case of considering phase transformations, the simulated results are in good agreement with the experimental measurements.
机译：本文的目的是研究固相转变对9Cr-1Mo改性对接焊残余应力分布演变的影响。建立了考虑冶金相变的热弹性塑性有限元模型。通过数值分析，研究了奥氏体-马氏体相变对体积变化和屈服强度变化对焊接残余应力的影响。结果表明，马氏体相变引起的体积变化和屈服强度变化对焊接残余应力影响较大。在考虑相变的情况下，模拟结果与实验测量结果非常吻合。

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