Effect of substructures on the mechanical properties of Alloy 718 weldments

摘要：

　　The fusion zones of alloy 718 with three different weld cooling rates were analyzed.Two different types of filler metals were employed.The microsegregation phenomenon in alloy 718 fusion zone was studied with reference to the cooling rates.The high temperature mechanical properties were evaluated.The correlation between the extent of microsegregation and the reduction in the strength were quantified.However the elongation of the weldment was mainly the function of the grain refinement in the fusion zone and heat affected zone.It was found that retention of higher Molybdenum content in the matrix led to the grain refinement and improved high temperature tensile properties

关键词： Alloy 718,GTA welding,Fusion zone substructure (FZSS),Solidification grain boundaries (SGB),Solidification sub grain boundaries (SSGB)

作者: SGK.Manikandan D.Sivakumar M.Kamaraj

作者单位: Indian Institute of Technology Madras, Chennai 600 036 Indian Space Research Organization, Trivandrum

会议类型: 国际会议

会议名称: The 9th China-Japan Bilateral Symposium on Hiigh Temperature Strength of Materials(第九届中日双边高温材料强度国际学术研讨会)

会议地点: 长沙

会议语种:英文

页码: 12-19

在线出版日期: 2016-10-16（万方平台首次上网日期，不代表论文的发表时间）