Effects of Temperature and Pressure of Hot Isostatic Pressing on the Grain Structure of Powder Metallurgy Superalloy
发布时间：2018-12-28
点击次数：
影响因子：3.4
DOI码：10.3390/ma11020328
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
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, Hot isostatic pressing, Prior particle boundary, Grain structure
摘要：The microstructure with homogeneously distributed grains and less prior particle boundary (PPB) precipitates is always desired for powder metallurgy superalloys after hot isostatic pressing (HIPping). In this work, we studied the effects of HIPping parameters, temperature and pressure on the grain structure in PM superalloy FGH96, by means of scanning electron microscope (SEM), electron backscatter diffraction (EBSD), transmission electron microscope (TEM) and Time-of-flight secondary ion spectrometry (ToF-SIMS). It was found that temperature and pressure played different roles in controlling PPB precipitation and grain structure during HIPping, the tendency of grain coarsening under high temperature could be inhibited by increasing HIPping pressure which facilitates the recrystallization. In general, relatively high temperature and pressure of HIPping were preferred to obtain an as-HIPped superalloy FGH96 with diminished PPB precipitation and homogeneously refined grains.
合写作者：Guoai He, Yunping Li, 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：11
期号：2
ISSN号：1996-1944
是否译文：否
发表时间：2018-12-28