Deformation-mechanism-based modeling of creep behavior of modified 9Cr-lMo steel

被引：33

作者：

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

Wu, X. J. ^{[2
]}

Liu, R. ^{[1
]}

Liu, J. ^{[1
]}

Yao, M. X. ^{[3
]}

机构：

[1] Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON K1S 5B6, Canada

[2] Natl Res Council Canada, Inst Aerosp Res, Struct & Mat Performance Lab, Ottawa, ON K1A 0R6, Canada

[3] Kennamet Stellite, Belleville, ON K8N 1G2, Canada

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 689卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Deformation-mechanism-based model; Modified 9Cr-lMo steel; Creep; Heat treatment; Thermomechanical processing; MARTENSITIC STEEL; RUPTURE;

D O I：

10.1016/j.msea.2017.02.044

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A deformation-mechanism-based true-stress creep model is proposed for studying the creep behavior of modified 9Cr-lMo steel in this research. Constant-load creep test is conducted on modified 9Cr-lMo steel in forged form (F91). The creep data obtained in the present study and those reported from the National Institute for Materials Science (NIMS, Japan) on modified 9Cr-lMo steels processed by different means are analyzed. It is revealed that the relationship of minimum creep rate versus applied engineering stress exhibits distinct power exponent n in three stress regions, which are associated with different deformation mechanisms. The proposed model considers three well recognized deformation mechanisms: dislocation glide, dislocation climb, and grain boundary sliding. The analyses of the experimental data show that this deformation-mechanism-based model can describe fairly well the entire creep deformation process consisting of primary, steady-state, and tertiary creep.

引用

页码：345 / 352

页数：8

共 16 条

[1] Alloy design of creep resistant 9Cr steel using a dispersion of nano-sized carbonitrides [J].

Abe, F. ;

Taneike, M. ;

Sawada, K. .

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 2007, 84 (1-2) :3-12

[2]

[Anonymous], 2014, CREEP DAT SHEET NO 4

[3]

Cverna F., 2006, Worldwide Guide to Equivalent Irons and Steels, V5th

[4] MICROSTRUCTURAL STUDY OF CREEP-RUPTURE IN A 12-PERCENT CHROMIUM FERRITIC STEEL [J].

EGGELER, G ;

EARTHMAN, JC ;

NILSVANG, N ;

ILSCHNER, B .

ACTA METALLURGICA, 1989, 37 (01) :49-60

[5] Microstructural stability and creep rupture strength of the martensitic steel P92 for advanced power plant [J].

Ennis, PJ ;

Zielinska-Lipiec, A ;

Wachter, O ;

CzyrskaFilemonowicz, A .

ACTA MATERIALIA, 1997, 45 (12) :4901-4907

[6]

Kassner ME, 2015, Fundamentals of Creep in Metals and Alloys

[7]

Klueh R. L., 2004, ORNL Report ORNL/TM-2004/176

[8] Elevated temperature ferritic and martensitic steels and their application to future nuclear reactors [J].

Klueh, RL .

INTERNATIONAL MATERIALS REVIEWS, 2005, 50 (05) :287-310

[9] Strengthening mechanisms of creep resistant tempered martensitic steel [J].

Maruyama, K ;

Sawada, K ;

Koike, J .

ISIJ INTERNATIONAL, 2001, 41 (06) :641-653

[10]

Meyers M.A., 2009, MECH BEHAV MAT, V547

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