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Cryorolling effect on microstructure and mechanical properties of Fe-25Cr-20Ni austenitic stainless steel
Xiong, Yi; He, Tiantian; Wang, Junbei; Lu, Yan; Chen, Lufei; Ren, Fengzhang; Liu, Yuliang; Volinsky, Alex A.; xy_hbdy@163.com
2015
Source PublicationMATERIALS & DESIGN
ISSN0261-3069
Volume88Pages:398-405
AbstractMicrostructure and mechanical properties of the Fe-25Cr-20Ni austenitic stainless steel after cryorolling with different reductions were investigated by means of optical, scanning and transmission electron microscopy, X-ray diffraction and mini-tensile testing. High density tangled dislocations and a small amount of deformation twins formed after 30% deformation. After 50% strain, a large amount of deformation twins was generated. Meanwhile, interactions between the twins and dislocations started to happen. As the strain increased to 70%, many deformation twins were produced and the interactions between the twins and dislocations were significantly enhanced. When the cryorolling was 90%, the grain size was refined to the nanometer scale. XRD analysis indicated that the diffraction peaks of the samples became broader with the strain increase. The yield strength and the ultimate strength increased from 305 MPa and 645 MPa (before deformation) to 1502 MPa and 1560 MPa (after 90% deformation), respectively. However, the corresponding elongation decreased from 40.8% to 6.4%. The tensile fracture morphology changed from typical dimple rupture to a mixture of quasi-cleavage and ductile fracture. After 90% deformation, the microhardness was 520 HV, which increased by 100% compared with the original un-deformed sample. (C) 2015 Elsevier Ltd. All rights reserved.
description.department[xiong, yi ; wang, junbei ; lu, yan ; chen, lufei ; ren, fengzhang ; liu, yuliang] henan univ sci & technol, sch mat sci & engn, luoyang 471023, peoples r china ; [xiong, yi ; ren, fengzhang] collaborat innovat ctr nonferrous met, luoyang 471023, peoples r china ; [he, tiantian] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [volinsky, alex a.] univ s florida, dept mech engn, tampa, fl 33620 usa
KeywordAustenitic Stainless Steel Cryorolling Microstructure Mechanical Properties
Funding OrganizationNational Natural Science Foundation of China [50801021, 51201061]; Program for the Young Key Teachers in the Henan Province [2011GGJS-070]; Henan Province Program for Science and Technology Innovation Excellent Talents [144200510009]; Science and technology project of Henan Province [152102210077]; Science and Technology Innovation Team of Henan University of Science and Technology [2015XTD006]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74702
Collection中国科学院金属研究所
Corresponding Authorxy_hbdy@163.com
Recommended Citation
GB/T 7714
Xiong, Yi,He, Tiantian,Wang, Junbei,et al. Cryorolling effect on microstructure and mechanical properties of Fe-25Cr-20Ni austenitic stainless steel[J]. MATERIALS & DESIGN,2015,88:398-405.
APA Xiong, Yi.,He, Tiantian.,Wang, Junbei.,Lu, Yan.,Chen, Lufei.,...&xy_hbdy@163.com.(2015).Cryorolling effect on microstructure and mechanical properties of Fe-25Cr-20Ni austenitic stainless steel.MATERIALS & DESIGN,88,398-405.
MLA Xiong, Yi,et al."Cryorolling effect on microstructure and mechanical properties of Fe-25Cr-20Ni austenitic stainless steel".MATERIALS & DESIGN 88(2015):398-405.
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