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 | |
会议录名称 | NANOMATERIALS BY SEVERE PLASTIC DEFORMATION: NANOSPD5, PTS 1 AND 2 |
2011 | |
页码 | 973-978 |
会议名称 | 5th International Conference on Nanomaterials by Severe Plastic Deformation |
会议日期 | MAR 21-25, 2011 |
会议地点 | Nanjing, PEOPLES R CHINA |
摘要 | 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. |
关键词 | Nanostructure Mechanical Property Duplex Stainless Steel |
WOS记录号 | WOS:000299234300162 |
课题组名称 | LNM材料介观力学性能的表征 |
资助信息 | Nanjing Univ Sci & Technol |
URL | 查看原文 |
收录类别 | EI |
语种 | 英语 |
引用统计 | |
文献类型 | 会议论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/45245 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Chen, L (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Chen L,Jiang P,Wu XL,et al. Mechanical Properties and Microstructure of a Duplex Nanostructure[C]NANOMATERIALS BY SEVERE PLASTIC DEFORMATION: NANOSPD5, PTS 1 AND 2,2011:973-978. |
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