Microstructure Characterization of Oxide Dispersion Strengthened Steels Containing Metallic Chromium Inclusions after High-Temperature Thermal Aging

被引：5

作者：

Ohtsuka, Satoshi ^{[1
]}

Yano, Yasuhide ^{[1
]}

Tanno, Takashi ^{[1
]}

Kaito, Takeji ^{[1
]}

Tanaka, Kenya ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Oarai, Ibaraki 3111393, Japan

来源：

MATERIALS TRANSACTIONS | 2013年 / 54卷 / 10期

关键词：

oxide dispersion strengthened steel; metallic chromium inclusion; anomalous microstructure change; M23C6; thermal aging; BOR-60 irradiation test; IRRADIATION TESTS; STAINLESS-STEELS; ALLOYS;

D O I：

10.2320/matertrans.M2013217

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructure characterizations of 9Cr-oxide dispersion strengthened (ODS) steels were carried out after high-temperature thermal aging to reproduce the anomalous microstructure change that occurred in the BOR-60 irradiation test-formation of abnormally coarse and irregular precipitates a few tens of micrometers in size. The 750 degrees C thermal aging for 8,000 h produced the precipitate growth in normalized-and-tempered (NTed) 9Cr-ODS steels, however, the largest precipitates were only a few micrometers. The furnace-cooling (PC) heat treatment produced the matrix structure change from tempered martensite to alpha-ferrite, but the precipitate size after the thermal aging was in the same level as that in the NTed 9Cr-ODS steel. In the case of NTed defective 9Cr-ODS steel containing metallic Cr inclusions, coarse and irregular precipitates were formed nearby metallic Cr inclusions after the 750 degrees C thermal aging for 8,000 h. In the case of FCed defective 9Cr-ODS steel containing metallic Cr inclusions, the 750 degrees C thermal aging for 8,000 h produced the pronounced growth of coarse and irregular precipitates, which was equivalent to the anomalous microstructure change in the BOR-60 irradiation test Based on the analyses using energy dispersive X-ray spectrometry (EDX) and electron backscattered pattern (EBSP), coarse and irregular precipitates were identified as M23C6.

引用

页码：2018 / 2026

页数：9

共 12 条

[1] Chemical Composition and Morphology of M7C3 Eutectic Carbide in High Chromium White Cast Iron Alloyed with Vanadium [J].

Filipovic, Mirjana ;

Romhanji, Endre ;

Kamberovic, Zeljko .

ISIJ INTERNATIONAL, 2012, 52 (12) :2200-2204

[2]

Hasegawa M., 1979, SUTENRESUKO BINRAN S, P146

[3] Atom probe field ion microscopy investigation of boron containing martensitic 9 Pct chromium steel [J].

Hofer P. ;

Miller M.K. ;

Babu S.S. ;

David S.A. ;

Cerjak H. .

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 2000, 31 (13) :975-984

[4] Mechanical and thermomechanical properties of commercially pure chromium and chromium alloys [J].

Holzwarth, U ;

Stamm, H .

JOURNAL OF NUCLEAR MATERIALS, 2002, 300 (2-3) :161-177

[5]

Kaito T., 2007, GLOBAL, P37

[6] ODS cladding fuel pins irradiation tests using the BOR-60 reactor [J].

Kaito, Takeji ;

Yano, Yasuhide ;

Ohtsuka, Satoshi ;

Inoue, Masaki ;

Tanaka, Kenya ;

Fedoseev, Alexander E. ;

Povstyanko, Alexander V. ;

Novoselov, Andrey .

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, 2013, 50 (04) :387-399

[7] Nano-mesoscopic structural control in 9CrODS ferritic/martensitic steels [J].

Ohtsuka, S. ;

Ukai, S. ;

Fujiwara, M. .

JOURNAL OF NUCLEAR MATERIALS, 2006, 351 (1-3) :241-246

[8] Investigation of the cause of peculiar irradiation behavior of 9Cr-ODS steel in BOR-60 irradiation tests [J].

Ohtsuka, Satoshi ;

Kaito, Takeji ;

Yano, Yasuhide ;

Yamashita, Shinichiro ;

Ogawa, Ryuichiro ;

Uwaba, Tomoyuki ;

Koyama, Shinichi ;

Tanaka, Kenya .

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, 2013, 50 (05) :470-480

[9] Decomposition of austenite in austenitic stainless steels [J].

Padilha, AF ;

Rios, PR .

ISIJ INTERNATIONAL, 2002, 42 (04) :325-337

[10] Influences of Mo substitution by W on the precipitation kinetics of secondary phases and the associated localized corrosion and embrittlement in 29% Cr ferritic stainless steels [J].

Park, CJ ;

Ahn, MK ;

Kwon, HS .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 418 (1-2) :211-217

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