The evolution history of superalloy powders during hot consolidation and plastic deformation
发布时间：2018-06-11
点击次数：
影响因子：4.7
DOI码：10.1016/j.matchar.2018.03.039
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 Characterization
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）（51401242）
关键字：Powder metallurgy, Superalloy, Prior particle boundary, Hot consolidation, Plastic deformation
摘要：Powder metallurgy superalloys are widely used to produce critical rotating parts in turbine engines. However, the issues like what is the driving force of precipitation on prior particle boundary (PPB) during consolidation and how the PPB structure evolves during plastic deformation still remain to be resolved. In this study, with the characterization of the microstructure evolution from powder, consolidation, to plastic deformation, the segregation of alloying elements on the particle boundaries at elevated temperature was analyzed by equilibrium thermodynamic calculations, and the distortion of PPB structure under large plastic deformation was quantitively simulated by finite element (FE) methods. The results indicated that surface energy serves as the main driving force of PPB precipitation and hot extrusion could distort the PPB structure and yield more uniformly refined grains.
合写作者：Yunping Li, Chenze Liu, Chuan Yang, Hanhui Ding, Lan Huang, Feng Liu, Zijun Qin
第一作者：谭黎明
论文类型：Article
通讯作者：Liang Jiang, Feng Liu
学科门类：工学
一级学科：冶金
卷号：140
页面范围：30-38
ISSN号：1044-5803
是否译文：否
发表时间：2018-06-11