Orientation dependence of creep properties and deformation mechanism in DD6 single crystal superalloy at 760 °C and 785 MPa

被引：42

作者：

Yu, J. ^{[1
]}

Li, J. R. ^{[1
]}

Zhao, J. Q. ^{[1
]}

Han, M. ^{[1
]}

Shi, Z. X. ^{[1
]}

Liu, S. Z. ^{[1
]}

Yuan, H. L. ^{[1
]}

机构：

[1] Beijing Inst Aeronaut Mat, Sci & Technol Adv High Temp Struct Mat Lab, Beijing 100095, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 560卷

关键词：

DD6; Single crystal superalloy; Creep; Anisotropy; Intermediate temperature; NICKEL-BASE SUPERALLOY; INTERMEDIATE TEMPERATURES; DISLOCATION-STRUCTURES; CMSX-4; BEHAVIOR; 750-DEGREES-C; ANISOTROPY; SRR-99; PHASE; SHEAR;

D O I：

10.1016/j.msea.2012.08.135

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of orientation on the creep properties of DD6 single crystal superalloy is investigated. The results show that anisotropic creep behaviors of DD6 alloy within 20 degrees of the [001] direction are observed at 760 degrees C and 785 MPa. The [001] direction and the [001]-[011] boundary exhibit lower primary creep strain and longer creep rupture lives than the [001]-]111] boundary. In addition, the major creep deformation mechanism of DD6 single crystal superalloy at 760 degrees C and 785 MPa is a < 112 > dislocation ribbon passing through both gamma and gamma' phases. The interaction between < 112 > [111] systems is the principle hardening mechanism for the transition from primary creep to secondary creep, the interaction leads to the anisotropy of primary creep and creep rupture lives for the [001] direction, the [001]-[011] boundary and the [001]-[011] boundary. (c) 2012 Published by Elsevier B.V.

引用

页码：47 / 53

页数：7

共 28 条

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