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张弘斌,张成才,韩宝坤,高魁东,李辉平,秦升学,刘杰,王艳,张鹏,周海萍.形变热处理工艺参数对冷轧态镍基高温合金晶界特征分布演变的影响[J].稀有金属材料与工程(英文),2020,49(11):3683~3691.[Hongbin Zhang,Chengcai Zhang,Baokun Han,Kuidong Gao,Huiping Li,Shengxue Qin,Jie Liu,Yan Wang,Peng Zhang and Haiping Zhou.Influence of thermal-mechanical processing parameters on grain boundary character distribution evolution in a cold-rolled Ni-based superalloy[J].Rare Metal Materials and Engineering,2020,49(11):3683~3691.]
Influence of thermal-mechanical processing parameters on grain boundary character distribution evolution in a cold-rolled Ni-based superalloy
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Received:March 04, 2020  Revised:May 18, 2020
DOI:
Key words: Ni-based superalloy  Grain boundary character distribution  CSL boundary  thermo-mechanical processing
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目):51804187 , 51904176;,中国博士后科学基金:2019M662400;青岛博士后应用研究项目;山东省重点研发计划:2019GGX104009
Author NameAffiliation
Hongbin Zhang,Chengcai Zhang,Baokun Han,Kuidong Gao,Huiping Li,Shengxue Qin,Jie Liu,Yan Wang,Peng Zhang and Haiping Zhou  
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Abstract:
      The influence of thermal-mechanical processing (TMP) parameters on the grain boundary character distribution evolution in a cold-rolled Ni-based superalloy was studied. During annealing treatment, growth accident model was considered to be the main mechanism for the formation of new Σ3 boundaries in the SRX grains. With the increasing annealing time and temperature, there was more time for grain boundary migration and the grain boundary migration was faster at the higher annealing temperature, which could stimulate the formation of Σ3 boundaries by increasing the frequency of growth accidents. In addition, the fraction of Σ3 boundaries decreased firstly with the increasing strain, and then increased again. At the strains of 0.1 and 0.7, the fractions of Σ3 boundaries reached around 60%, which was related to the well development of large grain-clusters. Besides that, the evolution of Σ1 boundaries, coherent Σ3 boundaries, incoherent Σ3 boundaries, Σ9 boundaries, Σ27 boundaries, and random boundaries were also analyzed in detail.