| Hf含量对镍基粉末高温合金中γ′相形态的影响 |
| |
| 引用本文： | 张义文,王福明,胡本芙.Hf含量对镍基粉末高温合金中γ′相形态的影响[J].金属学报,2012(8):1011-1017. |
| |
| 作者姓名： | 张义文 王福明 胡本芙 |
| |
| 作者单位： | 北京科技大学冶金与生态工程学院;钢铁研究总院高温材料研究所;北京科技大学材料科学与工程学院 |
| |
| 基金项目： | 国家重点基础研究发展计划项目2010CB631204;中俄政府间科技合作项目CR14-20资助~~ |
| |
| 摘 要： | 研究了含Hf镍基粉末高温合金在长期时效处理过程中γ′相形态的演化过程.结果表明:合金在高温长期处理过程中立方状γ′相发生分裂、呈现出二重平行状和八重小立方体组态.八重小立方体组态作为择优形态不再发生分裂,处于低能稳定状态.不同Hf含量合金的错配度发生明显变化,γ′相的长大或粗化过程可以粗略地分为"界面控制"和"应变控制"2个阶段,γ′相间弹性相互作用能对合金中析出相的形态变化起着重要作用.
|
| 关 键 词： | 粉末高温合金 Ni3(Al Ti) γ′相形态稳定性 |
EFFECT OF HAFNIUM CONTENT ON MORPHOLOGY EVOLUTION OF γ’ PRECIPITATES IN P/M Ni-BASED SUPERALLOY |
| |
| ZHANG Yiwen,WANG Fuming,HU Benfu.EFFECT OF HAFNIUM CONTENT ON MORPHOLOGY EVOLUTION OF γ’ PRECIPITATES IN P/M Ni-BASED SUPERALLOY[J].Acta Metallurgica Sinica,2012(8):1011-1017. |
| |
| Authors: | ZHANG Yiwen WANG Fuming HU Benfu |
| |
| Affiliation: | (3)) 1)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083 2)High Temperature Material Institute,Central Iron and Steel Research Institute,Beijing 100081 3)School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083 |
| |
| Abstract: | The cubic γ′particle morphology evolution was studied during long time aging process in a powder metallurgy(P/M) Ni-based superalloy with Hf addition.The results show that,during long time aging process,the cubic γ′particle splits into a doublet of plantes or an octet of cubes. The octet of cubes with low energy is a preferred shape,it splits no longer.Theγ/γ′lattice misfit varies with different Hf contents.The growth or coarsening process of γ′precipitate can be roughly divided into interface controlling and strain controlling stages,the γ′precipitate morphology is greatly influenced by the elastic interaction energy between γ′particles. |
| |
| Keywords: | powder metallurgy superalloy Ni3(Al Ti) γ′phase morphology stability |
| 本文献已被 CNKI 等数据库收录！ |
