University of Oulu

Yi Xiong, Yun Yue, Yan Lu, Tiantian He, Meixiang Fan, Fengzhang Ren, Wei Cao, Cryorolling impacts on microstructure and mechanical properties of AISI 316 LN austenitic stainless steel, In Materials Science and Engineering: A, Volume 709, 2018, Pages 270-276, ISSN 0921-5093, https://doi.org/10.1016/j.msea.2017.10.067. (http://www.sciencedirect.com/science/article/pii/S092150931731393X) Keywords: 316 LN austenitic stainless steel; Cryorolling; Microstructure; Mechanical properties; Deformation-induced martensite transformation

Cryorolling impacts on microstructure and mechanical properties of AISI 316 LN austenitic stainless steel

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Author: Xiong, Yi1,2; Yue, Yun3; Lu, Yan1;
Organizations: 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
2Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, China
3National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, China
4Nano and Molecular Systems Research Unit, University of Oulu, FIN-90014, Finland
5School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, China
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2017112955143
Language: English
Published: Elsevier, 2018
Publish Date: 2019-10-21
Description:

Abstract

Microstructure evolution and mechanical properties of AISI 316 LN austenitic stainless steel (SS) after cryorolling with different strains were investigated by means of optical, scanning and transmission electron microscopy, X-ray diffractometer, microhardness tester, and tensile testing system. The deformation-induced martensite transition and the deformation microstructure occurred during cryorolling process were always composed of high-density dislocations, deformation twins, and deformation-induced martensites. Following the strain, the dislocation density in deformation microstructure approached saturation state and the volume fraction of deformation twins combined with deformation-induced martensites increased significantly. At the 70% strain, original austenite was transformed into martensite completely. Further increasing the strain to 90% would refine the martensitic lamellae to nanoscale. The deformation degree also led to remarkable increase of the strength and hardness of the cryorolled SS, and drastic reductions of the elongation. Due to the cryorolling, the tensile fracture morphology changed from typical ductile rupture to a mixture of quasi-cleavage and ductile fracture.

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Series: Materials science and engineering. A, Structural materials: properties, microstructure and processing
ISSN: 0921-5093
ISSN-E: 1873-4936
ISSN-L: 0921-5093
Volume: 709
Pages: 270 - 276
DOI: 10.1016/j.msea.2017.10.067
OADOI: https://oadoi.org/10.1016/j.msea.2017.10.067
Type of Publication: A1 Journal article – refereed
Field of Science: 214 Mechanical engineering
Subjects:
Funding: This work was supported by the National Natural Science Foundation of China under Grants nos. 50801021 and 51201061, and by the Program for Science, Technology Innovation Talents in Universities of Henan Province (17HASTIT026), the Science and Technology Project of Henan Province (152102210077), Education Department of Henan Province (16A430005), International Cooperation Project from Henan Province (Grants nos. 172102410032) and the Science and Technology Innovation Team of Henan University of Science and Technology (2015XTD006).
Copyright information: © 2017 Elsevier B.V. All rights reserved.