Microstructural changes in alloy 625 during high temperature creep

被引：103

作者：

Mathew, M. D. ^{[1
]}

Parameswaran, P. ^{[1
]}

Rao, K. Bhanu Sankara ^{[1
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Met & Mat Grp, Kalpakkam 603102, Tamil Nadu, India

来源：

MATERIALS CHARACTERIZATION | 2008年 / 59卷 / 05期

关键词：

alloy; 625; creep; microstructure; delta-phase; gamma-phase;

D O I：

10.1016/j.matchar.2007.03.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructural changes in the nickel-base alloy G25 during creep deformation have been investigated in the temperature range of 923 to 1148 K for durations from 30 to 31,800 h. intermetallic phases such as gamma ''-phase and delta-phase have been found to precipitate extensively within the austenitic matrix under most of the test conditions. The gamma ''-phase was observed at 973 K and delta-phase was observed at all temperatures above 973 K. The morphology of the needle-shaped delta-phase was influenced by time and temperature of exposure and stress. An almost continuous decoration Of M23C6 type carbides was observed on the grain boundaries. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：508 / 513

页数：6

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