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高钰璧,丁雨田,陈建军,许佳玉,马元俊,刘德学.GH3625合金管材短流程制备过程中的晶界特征分布和织构演变[J].稀有金属材料与工程(英文),2020,49(6):1995~2003.[Gao Yubi,Ding Yutian,Chen Jianjun,Xu Jiayu,Ma Yuanjun and Liu Dexue.Grain Boundary Character Distribution and Texture Evolution in Short-flow Manufacture process of GH3625 Alloy Tubes[J].Rare Metal Materials and Engineering,2020,49(6):1995~2003.]
Grain Boundary Character Distribution and Texture Evolution in Short-flow Manufacture process of GH3625 Alloy Tubes
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Received:May 07, 2019  Revised:July 08, 2019
DOI:
Key words: GH3625 alloy, grain  boundary character  distribution, texture  evolution, Schmid  factor, Taylor  factor
Foundation item:国家重点研发计划项目(2017YFA0700703),国家自然科学基金资助(51661019和51664041),甘肃省科技重大专项项目No.145RTSA004
Author NameAffiliation
Gao Yubi,Ding Yutian,Chen Jianjun,Xu Jiayu,Ma Yuanjun and Liu Dexue  
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Abstract:
      In this work, the grain boundary characteristics distribution and texture evolution of GH3625 alloy tubes during short-flow manufacture process (hot extrusion, solution treatment, cold rolling and annealing treatment) were investigated by electron backscatter diffraction (EBSD) and orientation imaging microscopy (OIM) technique. And the cold and hot plastic deformability of alloy tubes via analyzing the Schmid factor and Taylor factor were further studied. The results show that the grain boundary character distribution in the short-flow manufacture process of GH3625 alloy tubes is optimized through annealing twins related to Σ3n grain boundaries rather than deformation twins. The Brass texture {110}<112> and fiber texture <111>//RD is generated in the hot extrusion/cold rolling deformation process of the alloy tubes, while the {110}<110> texture and Brass-R texture {111}<112> appear during solution/annealing treatment. GH3625 alloy tubes preferentially plastic deformation in the extrusion direction (RD) during hot extrusion, while plastic deformation occurs in the direction perpendicular to the rolling direction during cold rolling. At the same time, comparing the average Schmid factor value ms and Taylor factor value MT of GH3625 alloy tubes during hot extrusion and cold rolling deformation, it is found that the plastic deformability of cold rolling is worse than hot extrusion, and higher deformation work is needed.