Creep fracture toughness of welded joint for 2.25Cr1Mo steel

被引：0

作者：

Ma, CW ^{[1
]}

Xuan, FZ ^{[1
]}

Wang, ZD ^{[1
]}

Tu, ST ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200327, Peoples R China

来源：

MULTISCALE DAMAGE RELATED TO ENVIRONMENT ASSISTED CRACKING | 2005年

关键词：

welded joint; 2.25Cr1Mo steel; creep fracture toughness; creep crack growth; FAILURE ASSESSMENT;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

To assess the failure risk of high temperature welded structure using the time dependent failure assessment diagram (TDFAD), it is essential to obtain the creep fracture toughness of materials. In this paper, creep crack growth (CCG) tests for the base metal and weld metal of 2.25Cr1Mo steel have been carried out by utilizing the side grooved compact tension (CT) specimen and direct current (DC) electrical potential technique. The material parameter of creep fracture toughness, K(mat)(c), is obtained from analysis of weld metal and base metal tests at temperature of 550 degrees C. It has been found that the creep fracture toughness of weld metal is lower than that of base metal; the creep fracture toughness decreases with increasing time and increases with elevating temperature. For this reason, the value of K(mat)(c) at lower temperature or longer service time can be used to extract a conservative result in the high temperature defect assessment where the accurate value of K(mat)(c) is unavailable.

引用

页码：155 / 160

页数：6

共 10 条

[1] Failure assessment diagrams for high temperature defect assessment [J].

Ainsworth, RA ;

Hooton, DG ;

Green, D .

ENGINEERING FRACTURE MECHANICS, 1999, 62 (01) :95-109

[2]

*ASTM, 2000, ANN BOOK ASTM STAND, V3, P131

[3]

BILAL D, 2003, INT J PRESS PIP, V80, P149

[4]

British Energy, 2003, R5 ASSESSMENT PROCED

[5]

CARL DL, 2000, WELDING RES COUNCIL, V454

[6]

CURBISHLEY I, 1993, ESIS, V15, P441

[7] Failure assessment diagram analysis of creep crack initiation in 316H stainless steel [J].

Davies, CM ;

O'Dowd, NP ;

Dean, DW ;

Nikbin, KM ;

Ainsworth, RA .

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 2003, 80 (7-8) :541-551

[8] C-STAR-CORRELATIONS FOR CREEP CRACK-GROWTH IN WELD METALS [J].

GOOCH, DJ ;

KIMMINS, ST .

JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, 1986, 21 (04) :231-242

[9]

MASAAKI T, 2001, INT J PRESS PIP, V78, P779

[10]

Viswanathan R., 1989, DAMAGE MECH LIFE ASS

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