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  

Influence of Thermo-mechanical Processing Parameters on Grain Boundary Character Distribution Evolution of Cold-Rolled Ni-Based Superalloy

作　　者：张弘斌[1] 周海萍 张成才 韩宝坤[2] 高魁东[2] 李辉平[2] 秦升学[2] 刘杰[2] 王艳[2] 张鹏 Zhang Hongbin;Zhou Haiping;Zhang Chengcai;Han Baokun;Gao Kuidong;Li Huiping;Qin Shengxue;Liu Jie;Wang Yan;Zhang Peng(Shandong University of Science and Technology,Qingdao 266590,China;Fushun Special Steel Co.,Ltd,Fushun 113000,China)

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590 [2]山东科技大学,山东青岛266590 [3]抚顺特钢股份有限公司,辽宁抚顺113000

出　　处：《稀有金属材料与工程》2020年第11期3683-3691,共9页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51804187,51904176);China Postdoctoral Science Foundation(2019M662400);Qingdao Post-doctoral Researcher Applied Research Programs;Key Technology Research and Development Program of Shandong(2019GGX104009)。

摘　　要：研究了不同形变热处理工艺参数对冷轧态镍基高温合金中晶界特征分布演变的影响。结果表明,在退火处理过程中,生长事故模型是静态再结晶(SRX)晶粒中新Σ3晶界形成的主要机制。随着退火时间和退火温度的增加,晶界迁移时间延长,晶界迁移速度加快,从而增加了生长事故的发生频率,促进了Σ3晶界的形成。此外,随着应变的增加,Σ3晶界的比例先减小后增大。在冷轧变形量为0.1和0.7时,Σ3晶界的比例均可达到60%左右,这与大晶粒团簇的形成密切相关。此外,分析了不同工艺参数下,Σ1晶界、共格Σ3晶界、非共格Σ3晶界、Σ9晶界、Σ27晶界和随机晶界的演变规律。The influence of thermo-mechanical processing(TMP)parameters on the grain boundary character distribution evolution of cold-rolled Ni-based superalloy was studied.Results show that during annealing treatment,growth accident model is considered to be the main mechanism for the formation of newΣ3 boundaries in the static recrystallization(SRX)grains.With increasing the annealing time and temperature,there is more time for grain boundary migration and the grain boundary migration is faster at higher annealing temperatures,which can stimulate the formation ofΣ3 boundaries by increasing the frequency of growth accidents.In addition,the fraction ofΣ3 boundaries decreases firstly with increasing the strain,and then increases again.At the strains of 0.1 and 0.7,the fractions ofΣ3 boundaries reach around 60%,which is related to the well development of large grain-clusters.Besides,the evolution ofΣ1 boundaries,coherentΣ3 boundaries,incoherentΣ3 boundaries,Σ9 boundaries,Σ27 boundaries,and random boundaries were also analyzed.

关 键 词：镍基高温合金 晶界特征分布 CSL晶界 形变热处理工艺 

分 类 号：TG156[金属学及工艺—热处理] TG132.3[金属学及工艺—金属学]