Monte Carlo simulation of grain growth in heat-affected zone of ferritic stainless steel in laser-GMAW hybrid welding
The grain structure in the HAZ of 12 wt.％ Cr ferritic stainless steel under laser+pulsed gas metal arc welding (laser+GMAW-P) hybrid welding was studied experimentally and theoretically. First, an adaptive combined volumetric heat source model was developed to calculate the temperature field in laser+GMAW-P hybrid welding. Then a three dimensional Monte Carlo method using the computed thermal cycles was applied to simulate the evolution of grain structure in the hybrid welding HAZ of the ferritic stainless steel. The predicted fusion zone geometry and the mean grain size agree with the measured results for different welding conditions in laser+GMAW-P hybrid welding of ferritic stainless steel. The simulate results showed that in hybrid welding the width of CGHAZ and the grain structure varied dramatically along the fusion line direction, the maximum mean grain size near the top surface was much larger than that close to the weld root.
Laser + pulsed gas metal arc hybrid welding ferritic stainless steel Grain growth Heat-affected zone Monte Carlo simulation
Zhuanzhuan Zhang Chuansong Wu
MOE Key Laboratory for Liquid-Solid Evolution and Materials Processing,and Institute of Materials Joining,Shandong University,Jinan,250061,China
国际会议
济南
英文
1-17
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）