Precipitation behavior of type 347H heat-resistant austenitic steel during long-term high-temperature aging

被引：27

作者：

Zhou, Yinghui ^{[1
]}

Li, Yanmo ^{[1
]}

Liu, Yongchang ^{[1
]}

Guo, Qianying ^{[1
]}

Liu, Chenxi ^{[1
]}

Yu, Liming ^{[1
]}

Li, Chong ^{[1
]}

Li, Huijun ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2015年 / 30卷 / 23期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

STAINLESS-STEEL; EVOLUTION; CREEP; CARBIDE; TOUGHNESS; EXPOSURE; PHASE; M23C6; MX;

D O I：

10.1557/jmr.2015.343

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructural evolution of type 347H heat-resistant austenitic steel during long-term aging at 700-900 degrees C was investigated by using a transmission microscope, a scanning electron microscope, and electron energy spectrum technology. The microstructural examination showed the typical micrographs of MX carbonitrides and M23C6 carbides after aging. The existence of the Z phase (NbCrN) at the grain boundaries during aging was identified. Meanwhile, the possible precipitation sequence of these particles was also confirmed. In the beginning of aging, fine Nb(C,N) precipitates first, then, M23C6 carbides precipitate along the grain boundaries. Finally, the Z phase is also observed at the grain boundaries. Moreover, the influence of isothermal holding temperature on the precipitation of MX carbonitrides and M23C6 carbides was discussed. The various microstructural characterizations showed that the M23C6 carbides and MX carbonitrides precipitate more easily with the increase of aging temperature. Furthermore, the number and the size of MX particles and M23C6 carbides increase when the isothermal holding time is prolonged.

引用

页码：3642 / 3652

页数：11

共 26 条

[1] The role of niobium carbide in radiation induced segregation behaviour of type 347 austenitic stainless steel [J].

Ahmedabadi, Parag ;

Kain, Vivekanand ;

Gupta, Manu ;

Samajdar, I. ;

Sharma, S. C. ;

Bhagwat, P. ;

Chowdhury, R. .

JOURNAL OF NUCLEAR MATERIALS, 2011, 415 (01) :123-131

[2] Microstructural and electrochemical characterisation of heat-treated 347 stainless steel with different phases [J].

Chandra, K. ;

Kain, Vivekanand ;

Tewari, R. .

CORROSION SCIENCE, 2013, 67 :118-129

[3] Precipitation behavior of Fe2Nb Laves phase on grain boundaries in austenitic heat resistant steels [J].

Chen, S. W. ;

Zhang, C. ;

Xia, Z. X. ;

Ishikawa, H. ;

Yang, Z. G. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 616 :183-188

[4] Atomic resolution imaging of precipitate transformation from cubic TaN to tetragonal CrTaN [J].

Danielsen, Hilmar K. ;

Hald, John ;

Somers, Marcel A. J. .

SCRIPTA MATERIALIA, 2012, 66 (05) :261-264

[5] The evolution of primary and secondary niobium carbonitrides in AISI 347 stainless steel during manufacturing and long-term ageing [J].

Erneman, J ;

Schwind, M ;

Andrén, HO ;

Nilsson, JO ;

Wilson, A ;

Ågren, J .

ACTA MATERIALIA, 2006, 54 (01) :67-76

[6] Effect of aging at 700°C on precipitation and toughness of AISI 321 and AISI 347 austenitic stainless steel welds [J].

Guan, KS ;

Xu, XD ;

Xu, H ;

Wang, ZW .

NUCLEAR ENGINEERING AND DESIGN, 2005, 235 (23) :2485-2494

[7]

Ha V. T., 2012, MAT SCI ENG A-STRUCT, V558, P103, DOI [10.1016/j.msea.2012.07.090, DOI 10.1016/J.MSEA.2012.07.090]

[8] Improvement of creep-fatigue life by the modification of carbide characteristics through grain boundary serration in an AISI 304 stainless steel [J].

Hong, HU ;

Nam, SW .

JOURNAL OF MATERIALS SCIENCE, 2003, 38 (07) :1535-1542

[9] Unraveling the origin of strain-induced precipitation of M23C6 in the plastically deformed 347 Austenite stainless steel [J].

Hong, Sung-Min ;

Kim, Myung-Yeun ;

Min, Dong-Joon ;

Lee, Kyu-ho ;

Shim, Jae-Hyeok ;

Kim, Dong-Ik ;

Suh, Jin-Yoo ;

Jung, Woo-Sang ;

Choi, In-Suk .

MATERIALS CHARACTERIZATION, 2014, 94 :7-13

[10] Carbide precipitation kinetics in austenite of a Nb-Ti-V microalloyed steel [J].

Jung, Jae-Gil ;

Park, June-Soo ;

Kim, Jiyoung ;

Lee, Young-Kook .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (16-17) :5529-5535

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