IMECH-IR  > 非线性力学国家重点实验室
Mechanical Properties and Microstructure of a Duplex Nanostructure
Chen L(陈柳); Jiang P(姜萍); Wu XL(武晓雷); Yang MX(杨沐鑫); Wang C; Yang G; Chen, L (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Source PublicationNANOMATERIALS BY SEVERE PLASTIC DEFORMATION: NANOSPD5, PTS 1 AND 2
2011
Pages973-978
Conference Name5th International Conference on Nanomaterials by Severe Plastic Deformation
Conference DateMAR 21-25, 2011
Conference PlaceNanjing, PEOPLES R CHINA
Abstract

The nanostructure was obtained in a duplex stainless steel (DSS) by means of equal channel angular pressing. The mechanical properties were characterized by uniaxial tensile tests, while the microstructure was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was shown that the yield strength in a deformed nanostructure increased significantly from 402 MPa to 1461 MPa as compared to its coarse-grained counterpart. In contrast, the uniform elongation decreased significant to only 2% together with elongation to failure of 9.8%, much lower than those of 25.4% and 42.6%. After annealing at 700 degrees C for 10 minute, however, uniform elongation increases to 5.3% with the yield strength of 1200 MPa. TEM observation exhibited that deformation twins prevail in the austenite phase whereas the dislocations of high density present in ferrite. The plastic behavior in both phases was analyzed based on the deformation twinning and the presence of dislocation. Finally, the effect of the microstructure on mechanical properties was discussed.

KeywordNanostructure Mechanical Property Duplex Stainless Steel
WOS IDWOS:000299234300162
DepartmentLNM材料介观力学性能的表征
Funding OrganizationNanjing Univ Sci & Technol
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Indexed ByEI
Language英语
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Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/45245
Collection非线性力学国家重点实验室
Corresponding AuthorChen, L (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Chen L,Jiang P,Wu XL,et al. Mechanical Properties and Microstructure of a Duplex Nanostructure[C]. LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND:TRANS TECH PUBLICATIONS LTD,2011:973-978.
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