Effect of preexisting plastic deformation on the creep behavior of TP347 austenitic steel

被引：15

作者：

Hong, Sung-Min ^{[1
,2
]}

Min, Dong-Joon ^{[2
]}

Chung, Yong-Keun ^{[3
]}

Kim, Ju-Heon ^{[1
]}

Kim, Dong-Ik ^{[1
]}

Suh, Jin-Yoo ^{[1
]}

Shim, Jae-Hyeok ^{[1
]}

Jung, Woo-Sang ^{[1
]}

Choi, In-Suk ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, Seoul 02792, South Korea

[2] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea

[3] Doosan Heavy Ind & Construct Co Ltd, 555 Gwigok Dong, Chang Won 51711, Gyeongnam, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 654卷

基金：

新加坡国家研究基金会;

关键词：

TP347 austenitic steel; Creep properties; Strain-induced precipitation; Sigma phase; MULTICOMPONENT MULTIPHASE SYSTEMS; 316; STAINLESS-STEEL; PRECIPITATION; KINETICS; MICROSTRUCTURE; MECHANISMS; EVOLUTION; DAMAGE;

D O I：

10.1016/j.msea.2015.12.051

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigated the effect of preexisting plastic deformation with the strain of 30% on the creep behavior of TP347 austenitic steel at 650 degrees C with different applied stresses. The results showed that the creep rupture life of the prestrained sample increased more than that of the unstrained sample tested at 300, 250 and 200 MPa due to the strengthening of the mechanical twins induced by preexisting plastic deformation. Conversely, the prestrained samples were ruptured earlier than that of the unstrained sample tested when the lower creep stresses (150 and 125 MPa) were applied. The shorter creep rupture life of the prestrained sample was due to the reduced amount of time to a minimum creep rate and the shorter tertiary-stage creep time which can be related to the accelerated precipitation of sigma phase at the grain boundaries in the strained sample. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：390 / 399

页数：10

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