摘要
针对深熔电子束焊特有的钉形焊缝形貌特征,在综合考虑了熔池和匙孔中能量吸收与再分布效应的基础上,建立了高斯面热源和圆柱体热源组合的移动热输入数值模型。进而利用ANSYS通用有限元软件,对镍基高温合金GH4133电子束焊的完全穿透和部分穿透焊接温度场进行了三维数值模拟,分析中考虑了辐射换热和温度相关材料性能的影响。两种情况下的预测结果与实际接头的焊缝金相轮廓吻合良好,证明了组合热源模型的有效性,为进一步开展热-力-组织多场耦合的准确分析提供了可靠的保证。
According to the spike-liked weld profile in electron beam welding, a penetration model of the combination of moving Gauss area heat source and moving cylindrical volume heat source is presented, based on the effects of energy absorption and redistribution in the melt pool and keyhole. The three-dimensional temperature fields for both the full penetration mode and partial penetration mode in EBW of GH4133 superalloy are performed using a commercial FEM code, ANSYS. Experimental studies of metallurgic graph have also been conducted to validate the numerical models. It has been shown that the FE analysis predicted deep penetration weld shape is found to be in fair agreement with the corresponding experimental. It would be possible to provide a reliable solution for further analysis on multiphysical coupled field such as thermal, mechanical and microstructural.
出处
《航空材料学报》
EI
CAS
CSCD
2004年第5期21-25,共5页
Journal of Aeronautical Materials
