Effect of rare earth cerium on the creep properties of modified 9Cr-1Mo heat-resistant steel

被引：35

作者：

Xu, Y. -W. ^{[1
]}

Song, S. -H. ^{[1
]}

Wang, J. -W. ^{[1
]}

机构：

[1] Harbin Inst Technol, Shenzhen Grad Sch, Dept Mat Sci & Engn, Shenzhen Key Lab Adv Mat, Shenzhen 518055, Peoples R China

来源：

MATERIALS LETTERS | 2015年 / 161卷

基金：

中国国家自然科学基金;

关键词：

Creep; Rare earths; Grain Boundaries; Segregation; BEHAVIOR;

D O I：

10.1016/j.matlet.2015.09.051

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The creep properties of modified 9Cr-1Mo steel specimens, undoped and doped with 0.053 wt% Ce, which were normalized at 1055 degrees C and tempered at 760 degrees C, were examined under different engineering stresses (150-210 MPa) and temperatures (600-650 degrees C). The creep behavior of the steel followed the temperature-compensated power law and Monkman-Grant equations. The creep activation energy for the Ce-doped steel (662 kJ/mol) was apparently higher than that for the undoped one (541 kJ/mol). The 100 MPa-stress creep lifetime and 10(5) h creep rupture strength were estimated between 600 and 650 degrees C. At similar to 600 degrees C where the steel component was usually operated in engineering practice, the 100 MPa-stress creep lifetime of the Ce-doped steel was about 23 times as long as that of the undoped steel and the 10(5) h creep rupture strength of the former was about 7% higher than that of the latter. These indicated that Ce could substantially improve the creep properties of the steel. The segregation of Ce to grain or subgrain boundaries, carbide/matrix interfaces and dislocations could account for the improvement in the creep properties. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：616 / 619

页数：4

共 11 条

[1] Coarsening behavior of lath and its effect on creep rates in tempered martensitic 9Cr-W steels [J].

Abe, F .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 387 :565-569

[2]

Ashby MF., 1996, ENG MAT 1 INTRO THEI, V2nd

[3] Design of ferritic creep-resistant steels [J].

Bhadeshia, HKDH .

ISIJ INTERNATIONAL, 2001, 41 (06) :626-640

[4] Solute grain boundary segregation during high temperature plastic deformation in a Cr-Mo low alloy steel [J].

Chen, X. -M. ;

Song, S. -H. ;

Weng, L. -Q. ;

Liu, S. -J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (25-26) :7663-7668

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

Klueh, RL .

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

[6] Thermal creep properties of alloy D9 stainless steel and 316 stainless steel fuel clad tubes [J].

Latha, S. ;

Mathew, M. D. ;

Parameswaran, P. ;

Rao, K. Bhanu Sankara ;

Mannan, S. L. .

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 2008, 85 (12) :866-870

[7]

[刘贵立 Liu Guili], 2002, [中国稀土学报, Journal of the Chinese Rare Earth Society], V20, P444

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

Maruyama, K ;

Sawada, K ;

Koike, J .

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

[9]

Monkman F.C., 1956, Proc ASTM, V28, P593, DOI [DOI 10.2307/3469318, DOI 10.1016/J.MECHMAT.2004.10.003]

[10] Effect of Impurity Tin on the Creep Properties of a P91 Heat-Resistant Steel [J].

Song, S. -H. ;

Xu, Y. -W. ;

Yang, H. -F. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2014, 45A (10) :4361-4370

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