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,2020,49(6):1995~2003.[Gao Yubi,Ding Yutian,Chen Jianjun,Xu Jiayu,Ma Yuanjun,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.]
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
投稿时间:2019-05-07  修订日期:2019-07-08
中文关键词:  GH3625合金, 晶界特征分布, 织构演变, Schmid因子, Taylor因子
基金项目: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
中文摘要:
      采用EBSD和OIM技术研究了GH3625合金管材短流程制备过程中(热挤压、固溶处理、冷轧及退火处理)的晶界特征分布和织构演变规律,进一步通过分析Schmid因子和Taylor因子研究合金管材的冷热塑性变形能力。结果表明,GH3625合金管材的晶界特征分布主要是以退火孪晶相关的Σ3n晶界优化的,而不是形变孪晶;GH3625合金管材在热挤压/冷轧变形过程中主要形成Brass织构{110}<112>和Fiber织构<111>//RD,而在固溶/退火处理过程中主要形成{110}<110>织构和Brass-R织构{111}<112>;GH3625合金管材在热挤压变形时优先在挤压方向(RD)发生塑性变形,而在冷轧变形时优先在垂直于轧向的方向发生塑性变形;同时,对比热挤压和冷轧变形过程中GH3625合金管材平均的Schmid因子值ms和Taylor因子值MT发现冷轧变形比热挤压变形的塑性变形能力差,需要更高的形变功。
Grain Boundary Character Distribution and Texture Evolution in Short-flow Manufacture process of GH3625 Alloy Tubes
英文关键词:GH3625 alloy, grain  boundary character  distribution, texture  evolution, Schmid  factor, Taylor  factor
英文摘要:
      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.
作者单位E-mail
高钰璧 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 兰州 730050 gaoyubi1991@126.com 
丁雨田 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 兰州 730050 dingyt@lut.edu.cn 
陈建军 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 兰州 730050  
许佳玉 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 兰州 730050  
马元俊 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 兰州 730050  
刘德学 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 兰州 730050  
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