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Influence of Aging Treatment on the Microstructure and High Temperature Mechanical Properties for 15Cr-15Ni Titanium-modified Austenitic Stainless Steel in 20% Cold-worked Condition
Wang Zhinan1; Liang Tian1; Zhang Long1; Du Aibing2; Gao Ming1; Ma Yingche1; Liu Kui1
Corresponding AuthorLiang Tian(tliang@imr.ac.cn)
2018-11-01
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume47Issue:11Pages:3504-3511
AbstractTitanium-stabilized 15Cr-15Ni austenitic stainless steel in 20% cold-worked condition is considered as a promising candidate high temperature structural material for core components in liquid metal-cooled fast reactors (LMFR). Microstructure and high temperature mechanical properties of the as cold-worked alloy and the ones with different aging treatments were investigated by metallographic microscope, scanning and transmission electron microscope, and tensile testing machine. The results demonstrate that the recovery takes place when the alloy is aged at 550 degrees C for 336 h. The emergence of twins is attributed to dislocations movement. When the aging temperature increases to 650 and 750 degrees C, the amount of twins are reduced because of alloys' further recovery. Sigma phase precipitates from austenitic matrix along grain boundaries when alloys are aged at 650 similar to 750 degrees C for 336 h. The amount and size of Sigma phase increase with the increase in aging temperature. Because of the grain boundary strengthening, alloys aged at 550 degrees C have slightly higher yield strength and ultimate tensile strength than the as cold-worked alloy. The high temperature yield strength and ultimate tensile strength decrease significantly, while plasticity increases observably at the aging temperature of 650 and 750 degrees C.
Keywordtitanium-stabilized 15Cr-15Ni austenitic stainless steel aging treatment high temperature tension Sigma phase
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000452694200039
PublisherNORTHWEST INST NONFERROUS METAL RESEARCH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/130731
Collection中国科学院金属研究所
Corresponding AuthorLiang Tian
Affiliation1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China
2.China Inst Atom Energy, Beijing 102413, Peoples R China
Recommended Citation
GB/T 7714
Wang Zhinan,Liang Tian,Zhang Long,et al. Influence of Aging Treatment on the Microstructure and High Temperature Mechanical Properties for 15Cr-15Ni Titanium-modified Austenitic Stainless Steel in 20% Cold-worked Condition[J]. RARE METAL MATERIALS AND ENGINEERING,2018,47(11):3504-3511.
APA Wang Zhinan.,Liang Tian.,Zhang Long.,Du Aibing.,Gao Ming.,...&Liu Kui.(2018).Influence of Aging Treatment on the Microstructure and High Temperature Mechanical Properties for 15Cr-15Ni Titanium-modified Austenitic Stainless Steel in 20% Cold-worked Condition.RARE METAL MATERIALS AND ENGINEERING,47(11),3504-3511.
MLA Wang Zhinan,et al."Influence of Aging Treatment on the Microstructure and High Temperature Mechanical Properties for 15Cr-15Ni Titanium-modified Austenitic Stainless Steel in 20% Cold-worked Condition".RARE METAL MATERIALS AND ENGINEERING 47.11(2018):3504-3511.
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