Study on Laves phase in an advanced heat-resistant steel

被引：28

作者：

Hu, Ping ^{[1
,2
]}

Yan, Wei ^{[1
]}

Sha, Wei ^{[3
]}

Wang, Wei ^{[1
]}

Guo, Zhan-li ^{[4
]}

Shan, Yi-yin ^{[1
]}

Yang, Ke ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

[3] Queens Univ Belfast, Sch Planning Architecture & Civil Engn, Met Res Grp, Belfast BT9 5AG, Antrim, North Ireland

[4] Sente Software Ltd, Surrey Technol Ctr, Guildford GY2 7YG, Surrey, England

来源：

FRONTIERS OF MATERIALS SCIENCE | 2009年 / 3卷 / 04期

关键词：

heat-resistant steel; Laves phase; precipitate; microstructure; creep;

D O I：

10.1007/s11706-009-0063-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Laves phase is one of the most significant precipitates in ferritic/martensitic heat-resistant steels. Laves phase precipitates in the creep rupture specimens with different rupture life were studied on a 10 wt.% Cr heat-resistant steel. JMatPro thermodynamic and kinetic calculations were carried out to simulate and predict the precipitation behavior of the Laves phase in the steel at the equilibrium state. The morphologies of the Laves phase developed with creep time were characterized under both scanning electron microscope (SEM) and transmission electron microscope (TEM). Effects of Co on the growth behavior of Laves phase and the corresponding fracture mode were analyzed. It was found that the Laves phase in the steel grew to 200 nm in size after only 1598 h at 600 degrees C, indicating that the addition of Co in the steel could accelerate the growth of Laves phase, and the coalescence of large Laves phase would lead to the brittle intergranular fracture.

引用

页码：434 / 441

页数：8

共 18 条

[1] Effect of boron on microstructure and creep deformation behavior of tempered martensitic 9Cr steel [J].

Abe, F. ;

Semba, H. ;

Sakuraya, T. .

THERMEC 2006, PTS 1-5, 2007, 539-543 :2982-+

[2] THE EFFECT OF TUNGSTEN ON CREEP-BEHAVIOR OF TEMPERED MARTENSITIC 9CR STEELS [J].

ABE, F ;

NAKAZAWA, S .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1992, 23 (11) :3025-3034

[3] Creep rates and strengthening mechanisms in tungsten-trengthened 9Cr steels [J].

Abe, F .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 319 :770-773

[4] The influence of microstructural aspects on the service behaviour of advanced power plant steels [J].

Cerjak, H ;

Hofer, P ;

Schaffernak, B .

ISIJ INTERNATIONAL, 1999, 39 (09) :874-888

[5] Creep stress effect on the precipitation behavior of Laves phase in Fe-10%Cr-6%W alloys [J].

Cui, J ;

Kim, IS ;

Kang, CY ;

Miyahara, K .

ISIJ INTERNATIONAL, 2001, 41 (04) :368-371

[6] Microstructure and long-term creep properties of 9-12% Cr steels [J].

Hald, J. .

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 2008, 85 (1-2) :30-37

[7]

Hald J., 1998, P 6 LIEG C MAT ADV P, P155

[8] Causes of breakdown of creep strength in 9Cr-1.8W-0.5Mo-VNb steel [J].

Lee, Jae Seung ;

Armaki, Hassan Ghassemi ;

Maruyama, Kouichi ;

Muraki, Taro ;

Asahi, Hitoshi .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 428 (1-2) :270-275

[9] Precipitation of Fe2W laves phase and modeling of its direct influence on the strength of a 12Cr-2W steel [J].

Li, QA .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2006, 37A (01) :89-97

[10] Modelling of materials properties in duplex stainless steels [J].

Li, X ;

Miodownik, AP ;

Saunders, N .

MATERIALS SCIENCE AND TECHNOLOGY, 2002, 18 (08) :861-868

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