EBSD Characterization of Microstructure and Micro-texture in a Friction Stir-Welded DP600 Steel  

作　　者：H.Ashrafi M.Shamanian M.Sanayei F.Farhadi J.A.Szpunar 

机构地区：[1]Faculty of Chemical and Materials Engineering,Shahrood University of Technology,Shahrood,3619995161,Iran [2]Department of Materials Engineering,Isfahan University of Technology,Isfahan,8415683111,Iran [3]Department of Mechanical Engineering,University of Saskatchewan,Saskatoon,SK,S7N 5A9,Canada [4]Department of Materials Science and Engineering,Worcester Polytechnic Institute,Worcester,MA,01609,USA

出　　处：《Acta Metallurgica Sinica(English Letters)》2023年第5期789-802,共14页金属学报（英文版）

摘　　要：The microstructure and micro-texture in different areas of a friction stir(FS)-welded DP600 steel were investigated by means of electron backscatter diffraction.The volume fraction of martensite and non-polygonal ferrite was evaluated based on the image quality(IQ)parameter.Analysis of grain boundaries revealed that the fraction of sub-grain boundaries as well as that of low-angle grain boundaries in the heat-affected zone(HAZ)and stir zone(SZ)was more than doubled compared to those in the DP600 steel base metal(BM).The micro-texture examination of the BM showed strong{112}<110>and{111}<112>components with an intensity 4.6 times of that random texture.The texture showed a memory effect in the HAZ,with a reduced overall intensity.Within the SZ,D_(1),D_(2) and E shear texture components together with a cube component were developed.Formation of these texture components of ferrite were attributed to the transformation of B and R texture components of prior austenite,which are evidences of continuous dynamic recrystallization mechanism in the SZ of the friction stir-welded DP600 steel.

关 键 词：Dual phase steel Friction stir welding MICRO-TEXTURE Image quality 

分 类 号：TG453.9[金属学及工艺—焊接]