Directional Migration Behavior of Alloying Elements in the Rafting Process of the Single Crystal Superalloy DD6

被引：2

作者：

Zhang Shiming ^{[1
]}

Yu Jingui ^{[1
]}

Huang Zeyin ^{[1
]}

Huang Rong ^{[1
]}

Liu Shengfa ^{[1
]}

Zhang Qiaoxin ^{[1
]}

Yue Zhufeng ^{[2
]}

Li Xuewu ^{[1
]}

机构：

[1] Wuhan Univ Technol, Wuhan 430070, Peoples R China

[2] Northwestern Polytech Univ, Xian 710072, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2016年 / 45卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Ni-based superalloys; creep; directional migration; diffusion; CREEP-BEHAVIOR; MICROSTRUCTURE EVOLUTION; PHASE; PRECIPITATION; DEFORMATION; ORIENTATION; SIMULATION; RUPTURE; RE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper investigated the directional migration behavior of the alloying elements in the rafting process of the single crystal superalloy DD6 with [001] orientation under 300 MPa at 1000 degrees C. The microstructure of the single crystal superalloy DD6 was acquired by SEM. The results indicate that the rafting direction of gamma' phase is nearly perpendicular to stress axis. The matrix channel running parallel to the stress axis gets wider, but it will fade away gradually in vertical direction. Statistical analysis of the alloy components by TEM reveals the directional migrations of the elements Al, Re and Win the single crystal superalloy DD6. The element Al spreads to the matrix channel which is parallel to the stress axis, while Re and W diffuse to the matrix channel which is perpendicular to the stress axis, and obviously concentrate in the crossing area of the above mentioned channels.

引用

页码：1147 / 1151

页数：5

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