| L12 -Ni3(Al, Cr)沉淀先期效应的微观相场模拟 |
| |
| 引用本文： | 苗树芳,陈 铮,王永欣,卢艳丽,赵 彦,马 锐. L12 -Ni3(Al, Cr)沉淀先期效应的微观相场模拟[J]. 稀有金属材料与工程, 2009, 38(9): 1562-1566 |
| |
| 作者姓名： | 苗树芳 陈 铮 王永欣 卢艳丽 赵 彦 马 锐 |
| |
| 作者单位： | 西北工业大学,陕西,西安,710072 |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 基于微观相场模型, 研究Ni80Al7Cr13合金在873 K时效过程中L12 结构Ni3(Al,Cr)的沉淀先期效应.分析沉淀早期微结构、成分及有序度随时间的变化.研究发现,原子有序化早于原子簇聚,首先形成有序度很低的L10结构非化学计量比有序畴,随着时间的延长,有序畴的有序度逐渐提高,当有序度增大到一定时,L10结构非化学计量比有序畴逐渐向非化学计量比L12结构转变,最后非化学计量比L12 结构有序畴的成分和有序度随时间的增长逐渐达到化学计量比L12结构的成分和有序度,在化学计量比L12 结构的有序相中,Al原子倾向于占据αⅠ反位, 而Cr原子则倾向于在αⅡ反位择优占位.
|
| 关 键 词： | 沉淀 先期效应 微观相场 |
| 收稿时间： | 2008-09-10 |
Computer Simulation of the Early Stage of Precipitation of L12-Ni3(Al,Cr) Using Microscopic Phase-Field Method |
| |
| Miao Shufang,Chen Zheng,Wang Yongxin,Lu Yanli,Zhao Yan and Ma Rui. Computer Simulation of the Early Stage of Precipitation of L12-Ni3(Al,Cr) Using Microscopic Phase-Field Method[J]. Rare Metal Materials and Engineering, 2009, 38(9): 1562-1566 |
| |
| Authors: | Miao Shufang Chen Zheng Wang Yongxin Lu Yanli Zhao Yan Ma Rui |
| |
| Affiliation: | Miao Shufang,Chen Zheng,Wang Yongxin,Lu Yanli,Zhao Yan,Ma Rui(Northwestern Polytechnical University,Xi'an 710072,China) |
| |
| Abstract: | Based on the microscopic phase-field model, the evolution of atom morphology of Ni80Al7Cr13 ternary alloy is simulated at 873 K during the aging process.The early stage effect of precipitation is studied and discussed through analysising the changes of microstructure, composition and order parameter with the time.The study shows that the ordering of atom is happened earlier than the clustering of atom in the early time of precipitation, firstly forming the nonstoicheometric L10 ordered domain with very low ... |
| |
| Keywords: | L12-Ni3(Al Cr) |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
|
