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首页> 外文期刊>Materials & design >Influence of deposition sequence on welding residual stress and deformation in an austenitic stainless steel J-groove welded joint
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Influence of deposition sequence on welding residual stress and deformation in an austenitic stainless steel J-groove welded joint

机译：沉积顺序对奥氏体不锈钢J型槽焊接接头中焊接残余应力和变形的影响

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摘要

Residual tensile stresses often increase the susceptibility to cold cracking, and also promote brittle fracture, fatigue failure, and stress corrosion cracking in combination with tensile stresses experienced during service. Welding-induced deformation usually degrades the performance of a structure. Thus, the control of welding residual stress and distortion is a crucial task in welding manufacturing. There are too many factors that affect welding residual stresses and distortion. Besides material properties and design-related parameters, the welding procedures such as deposition sequence and assembly sequence also have significant influence on the final residual stress distribution and deformation. In this study, a computational approach based on Quick Welder software was developed to simulate the welding temperature field, residual stress distribution and deformation in multi-pass joints. The main objective was to clarify the influence of deposition sequence on the final residual stress distribution and deformation in an austenitic stainless steel tube-block joint with J-groove. The simulation results indicate that deposition sequence not only significantly affects the distribution of residual stress but also can alter the deformation mode to a certain extent. In addition, it was found that the last weld pass seems to have the largest contribution to the final welding residual stress filed of current tube-block joint.
机译：残余拉伸应力通常会增加对冷裂纹的敏感性，并且结合使用过程中遇到的拉伸应力，还会促进脆性断裂，疲劳破坏和应力腐蚀裂纹。焊接引起的变形通常会降低结构的性能。因此，控制焊接残余应力和变形是焊接制造中的关键任务。有太多因素会影响焊接残余应力和变形。除了材料特性和与设计相关的参数外，焊接程序（例如沉积顺序和装配顺序）也对最终残余应力分布和变形产生重大影响。在这项研究中，开发了一种基于Quick Welder软件的计算方法来模拟焊接温度场，残余应力分布和多道次接头的变形。主要目的是弄清沉积顺序对带有J槽的奥氏体不锈钢管-块接头的最终残余应力分布和变形的影响。仿真结果表明，沉积顺序不仅显着影响残余应力的分布，而且可以在一定程度上改变变形模式。另外，发现最后的焊道似乎对当前管-块接头的最终焊接残余应力具有最大的贡献。

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