Effects of strain amount and strain rate on grain structure of a novel high Co nickel-based polycrystalline superalloy
发布时间：2017-10-05
点击次数：
影响因子：8.4
DOI码：10.1016/j.matdes.2017.06.004
所属单位：中南大学粉末冶金研究院
教研室：高温结构材料研究所
发表刊物：Materials & Design
项目来源：中国国家重点研究与发展计划（2016YFB0701404），中国国家自然科学基金（NSFC）（91860105）&（52074366），中国博士后科学基金会（2019M662799），中南大学创新驱动计划的青年人才项目（2019XZ027），中国山东主要科技创新项目（2019JZZY010325），长沙市自然科学基金（kq2014126）
关键字：High Co addition, Nickel-based superalloy, Dynamical recrystallization, Dynamical recovery, Abnormal grain growth
摘要：The development of nickel-based superalloys with high Co addition has aroused widespread interest recently owing to their potential application in hot sections of gas turbine. However, how hot working parameters impact the grain evolution of these superalloys remains to be studied systematically. In this work, high-throughput double cone ( DC) specimen, which yielded gradient strain at different regions in a single sample after hot compression, were designed to investigate the thermo-mechanical behaviors of a novel superalloy. Superslovus treatment was subsequently conducted to investigate the susceptibility to abnormal grain growth (AGG). By means of finite element simulation, transmission electron microscope (TEM), and electron backscatter diffraction (EBSD), it was found that slow strained DC was preferred to obtain a well-distributed grain structure after supersolvus annealing, owing to its adequate dynamical recrystallization (DRX) and dynamical recovery (DRV) during deformation.
合写作者：黄再旺, Feng Liu, Guoai He, Xin Wang, Lan Huang, Yiwen Zhang, Liang Jiang
第一作者：谭黎明
论文类型：Article
通讯作者：Feng Liu
学科门类：工学
一级学科：冶金
卷号：131
页面范围：60-68
ISSN号：0264-1275
是否译文：否
发表时间：2017-10-05