Impact Factor:8.4
DOI number:10.1016/j.matdes.2017.06.004
Affiliation of Author(s):中南大学粉末冶金研究院
Teaching and Research Group:高温结构材料研究所
Journal:Materials & Design
Funded by: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）
Key Words:High Co addition, Nickel-based superalloy, Dynamical recrystallization, Dynamical recovery, Abnormal grain growth
Abstract: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.
Co-author:Zaiwang Huang, Feng Liu, Guoai He, Xin Wang, Lan Huang, Yiwen Zhang, Liang Jiang
First Author:Liming Tan
Indexed by:Article
Correspondence Author:Feng Liu
Discipline:Engineering
First-Level Discipline:冶金
Volume:131
Page Number:60-68
ISSN No.:0264-1275
Translation or Not:no