Microstructure and Mechanical Properties of HIP-Consolidated René 95 Powders
Microstructure and Mechanical Properties of HIP-Consolidated René 95 Powders
复制标题
HIP-Consolidated René 95 粉末的微观结构和机械性能
DOI：
10.2497/jjspm.25.262
复制
发表时间：
1978
期刊：
影响因子：
--
通讯作者：
H. Doi
中科院分区：
文献类型：
--
作者：
Y. Shimanuki;Y. Nishino;M. Masui;H. Doi
研究了热处理对热等静压（HIP）固结PAM Rene 95显微组织的影响。试样的显微组织表现为高度锯齿状的晶界。结果表明，这种锯齿状晶界是在从HIP温度到γ′溶剂温度的缓慢冷却过程中形成的。当样品在高于γ′溶剂温度的温度下淬火时，发现晶界变得光滑。力学试验和显微组织观察表明，锯齿状晶界通过延缓裂纹沿晶界扩展而提高了室温和高温下的塑性。具有锯齿晶界的热变形和热处理试样的蠕变性能优于铸+变形材料。
Effects of heat-treatments on microstructure of PAM Rene 95 consolidated by the hot-isostatic pressing (HIP) were examined in some detail. Microstructure of as-HIP'd specimen was characterized by highly serrated grain boundaries. It was clarified that such serrated grain boundaries were formed during slow cooling from HIP temperature across the γ′ solvus temperature. Grain boundaries were found to become smooth when the specimen was quenched from temperatures above the γ′ solvus temperature. Mechanical tests and microstructural observations revealed that the serrated grain boundaries improved ductility at both room- and elevated-temperatures by retarding crack propagation along grain boundaries. The creep properties of HIP'd and heat-treated specimens which contained serrated grain boundaries were found to be superior to the properties of cast +wrought material.