Numerical simulation of thermally induced residual stresses in friction stir welding of aluminum alloy 2024-T3 at different welding speeds
Numerical simulation of thermally induced residual stresses in friction stir welding of aluminum alloy 2024-T3 at different welding speeds
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DOI：
10.1007/s00170-016-9793-8
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发表时间：
2017-07-01
影响因子：
3.4
通讯作者：
Rethmeier, Michael
中科院分区：
文献类型：
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作者：
Bachmann, Marcel;Carstensen, Jan;Rethmeier, Michael
本文对 6 mm 厚铝合金 AA2024-T3 搅拌摩擦焊残余应力演化进行数值有限元模拟。使用商业代码 COMSOL Multiphysics 5.0 计算焊接过程中的瞬态热场。因此，采用了热拟机械（TPM）热源。随后使用不同的硬化模型对 60 和 300 毫米/分钟的不同焊接速度进行机械模拟。还研究了由于与加热相关的硬化沉淀溶解而导致的材料软化的影响。进行了热电偶测量以及残余应力的维氏硬度和 X 射线测量方面的实验，并与数值结果进行了比较。对于不同的应用焊接速度，在质量和数量上都发现了良好的一致性。
The paper deals with a numerical finite element simulation of the residual stress evolution in friction stir welding of 6 mm thick aluminum alloy AA2024-T3. The transient thermal field during the welding process was calculated with the commercial code COMSOL Multiphysics 5.0. Therefore, a thermal-pseudo-mechanical (TPM) heat source was implemented. A subsequent mechanical simulation was performed with varying hardening models for different welding speeds of 60 and 300 mm/min. The influence of softening of the material, which was due to hardening precipitation dissolution associated to the heating, was also investigated. Experiments in terms of thermocouple measurements as well as Vickers hardness and X-ray measurements of the residual stresses were conducted and compared to numerically obtained results. A qualitatively as well as quantitatively good agreement was found for different applied welding speeds.