Atomic image and site occupation of ordering process study on Ni75Al25-xFex alloy1

摘要：

Microscopic phase-field model is used investigate the ordering progress and the atomic site occupation of Ni75Al25-xFex alloy by simulating the atomic images, calculating long-range order parameters and concentration, and characterizing the information processing of the atomic site occupation in the γ phase. The investigations find that the Fe atoms partly occupy the B-site, and share B-site with Al atoms together. The precipitated γ phase is a kind of the complex Ni3(Al1-xFex) single-phase. The γ precipitation obeys the congruent ordering and spinodal decomposition style. The obtained results are well consistent with the correlative testing experiments of the x-ray-diffraction and 3 dimension atom probes. It has a certain theory instructing to further study the microstructure and the properties of the Ni75Al25-xFex alloy.

关键词： atomic image x-ray-diffraction testing Ni75Al25-xFex atomic site occupation microscopic phase-field.

作者: LIANG Minjie CHEN Zheng WANG Yongxin

作者单位: School of Material Science and Engineering, Northwestern Polytechnical University, Xian Shaanxi 710072, China

会议类型: 国际会议

会议名称: 第七届国际测试技术研讨会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-05（万方平台首次上网日期，不代表论文的发表时间）