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Effects of Mn on the mechanical properties and high temperature oxidation of 9Cr2WVTa steel
Jin, Xiaojie; Chen, Shenghu; Rong, Lijian; Chen, SH; Rong, L (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
2017-10-01
Source PublicationELSEVIER SCIENCE BV
ISSN0022-3115
Volume494Pages:103-113
AbstractThe mechanical properties and high temperature oxidation behaviors of 9Cr2WVTa steels with Mn contents in the range of 0.04-0.93 wt% were investigated. There are no obvious differences in the tensile properties at room temperature and high temperature, only a slight reduction in the impact toughness when Mn content reaches 0.93 wt%. Remarkably, the high temperature oxidation resistance is significantly improved with an increase of Mn content. After 500 h of oxidation, a ( Fe0.6Cr0.4)(2)O-3 oxide scale is developed on the steel with 0.04 wt% Mn, Mn1.5Cr1.5O4 oxides are occasionally detected when Mn content reaches 0.47 wt%, while a thin compact scale with a mixture of Mn1.5Cr1.5O4 and Cr1.3Fe0.7O3 oxides is formed on the steel containing 0.93 wt% Mn. Addition of Mn promotes the formation of Mn-oxides, which lowers oxygen partial pressure and accelerates external oxidation of Cr. At last, the presence of Mn-Cr spinels and Cr-rich oxides improves the oxidation resistance. (C) 2017 Elsevier B.V. All rights reserved.; The mechanical properties and high temperature oxidation behaviors of 9Cr2WVTa steels with Mn contents in the range of 0.04-0.93 wt% were investigated. There are no obvious differences in the tensile properties at room temperature and high temperature, only a slight reduction in the impact toughness when Mn content reaches 0.93 wt%. Remarkably, the high temperature oxidation resistance is significantly improved with an increase of Mn content. After 500 h of oxidation, a ( Fe0.6Cr0.4)(2)O-3 oxide scale is developed on the steel with 0.04 wt% Mn, Mn1.5Cr1.5O4 oxides are occasionally detected when Mn content reaches 0.47 wt%, while a thin compact scale with a mixture of Mn1.5Cr1.5O4 and Cr1.3Fe0.7O3 oxides is formed on the steel containing 0.93 wt% Mn. Addition of Mn promotes the formation of Mn-oxides, which lowers oxygen partial pressure and accelerates external oxidation of Cr. At last, the presence of Mn-Cr spinels and Cr-rich oxides improves the oxidation resistance. (C) 2017 Elsevier B.V. All rights reserved.
description.department[jin, xiaojie ; chen, shenghu ; rong, lijian] chinese acad sci, inst met res, key lab nucl mat & safety assessment, 72wenhua rd, shenyang 110016, liaoning, peoples r china ; [jin, xiaojie] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china
KeywordSteel Mn Mechanical Property High Temperature Oxidation Mn-cr Spinel
Subject AreaMaterials Science, Multidisciplinary ; Nuclear Science & Technology
Funding OrganizationMajor Research Plan of the National Natural Science Foundation of China [91226204]; Innovation Foundation of IMR [2015-PY10]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79074
Collection中国科学院金属研究所
Corresponding AuthorChen, SH; Rong, L (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Jin, Xiaojie,Chen, Shenghu,Rong, Lijian,et al. Effects of Mn on the mechanical properties and high temperature oxidation of 9Cr2WVTa steel[J]. ELSEVIER SCIENCE BV,2017,494:103-113.
APA Jin, Xiaojie,Chen, Shenghu,Rong, Lijian,Chen, SH,&Rong, L .(2017).Effects of Mn on the mechanical properties and high temperature oxidation of 9Cr2WVTa steel.ELSEVIER SCIENCE BV,494,103-113.
MLA Jin, Xiaojie,et al."Effects of Mn on the mechanical properties and high temperature oxidation of 9Cr2WVTa steel".ELSEVIER SCIENCE BV 494(2017):103-113.
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