The effect of thermal exposure on the properties of a Ni-base superalloy

被引：60

作者：

Aghaie-Khafri, M. ^{[1
]}

Hajjavady, M. ^{[1
]}

机构：

[1] KN Toosi Univ Technol, Fac Mech Engn, Tehran, Iran

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 487卷 / 1-2期

关键词：

superalloy; coarsening; creep; phase transformations;

D O I：

10.1016/j.msea.2007.11.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of 1000h thermal exposure on the microstructural instability and mechanical properties degradation of IN738C at 850 degrees C were investigated by means of TEM, SEM and accelerated creep tests. Experimental observation on the coarsening of primary and secondary gamma' precipitates showed that D-3 - D-0(3) is linear with time in accordance with LSW theory. The correlation between gamma' changes due to thermal exposure and creep characteristics was investigated and modeled on the basis of the gamma' diameter and gamma' particles spacing. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：388 / 393

页数：6

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