Facilitating effect of interfacial grooves on the rafting of nickel-based single crystal superalloy at high temperature

被引：40

作者：

Qi, Dongqing ^{[1
,2
]}

Wang, Li ^{[3
]}

Zhao, Peng ^{[2
,4
]}

Qi, Lu ^{[2
,4
]}

He, Suyun ^{[2
,4
]}

Qi, Yang ^{[1
]}

Ye, Hengqiang ^{[1
,2
]}

Zhang, Jian ^{[3
]}

Du, Kui ^{[2
]}

机构：

[1] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China

[2] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

[3] Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China

[4] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China

来源：

SCRIPTA MATERIALIA | 2019年 / 167卷

基金：

中国国家自然科学基金;

关键词：

Superalloy; Interfaces; Grooves; Creep; Aging; LOW-STRESS CREEP; GAMMA/GAMMA'-INTERFACES; ELECTRON-MICROSCOPY; GAMMA' PHASE; MICROSTRUCTURE; DISLOCATIONS; BEHAVIOR; ALLOY; MODEL; DEFORMATION;

D O I：

10.1016/j.scriptamat.2019.04.001

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Interfacial grooving induced by dislocation stress takes place at gamma/gamma' interfaces during creep and aging of a third-generation nickel-based single crystal superalloy at 1120 degrees C. At the tip of grooves, gamma' phase is directly measured under compressive stress of interfacial dislocations, which likely drives the gamma'-forming elements out. The enrichment of Re and Co elements are detected in the tip. Meanwhile, gamma' precipitates coarsen much faster when more grooves form at the interfaces along the coarsening direction. This suggests that interfacial grooves facilitate the rafting of gamma' precipitates, especially under the creep stress. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：71 / 75

页数：5

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