Xiong, Y., Yue, Y., He, T., Lu, Y., Ren, F., Cao, W. (2018) Effect of Rolling Temperature on Microstructure Evolution and Mechanical Properties of AISI316LN Austenitic Stainless Steel. Materials, 11 (9), 1557. doi:10.3390/ma11091557
Effect of rolling temperature on microstructure evolution and mechanical properties of AISI316LN austenitic stainless steel
|Author:||Xiong, Yi1,2; Yue, Yun3; He, Tiantian3;|
1School of Materials Science and Engineering, Henan University of Science and Technology
2Collaborative Innovation Center of Nonferrous Metals, Henan, China
3National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology
4Nano and Molecular Systems Research Unit, University of Oulu
5School of Mechanical and Automotive Engineering, Anhui Polytechnic University
|Online Access:||PDF Full Text (PDF, 10.4 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2018092636658
Multidisciplinary Digital Publishing Institute,
|Publish Date:|| 2018-09-26
The impacts of rolling temperature on phase transformations and mechanical properties were investigated for AISI 316LN austenitic stainless steel subjected to rolling at cryogenic and room temperatures. The microstructure evolution and the mechanical properties were investigated by means of optical, scanning, and transmission electron microscopy, an X-ray diffractometer, microhardness tester, and tensile testing system. Results showed that strain-induced martensitic transformation occurred at both deformation temperatures, and the martensite volume fraction increased with the deformation. Compared with room temperature rolling, cryorolling substantially enhanced the martensite transformation rate. At 50% deformation, it yielded the same fraction as the room temperature counterpart at 90% strain, while at 70%, it totally transformed the austenite to martensite. The strength and hardness of the stainless steel increased remarkably with the deformation, but the corresponding elongation decreased dramatically. Meanwhile, the tensile fracture morphology changed from a typical ductile rupture to a mixture of ductile and quasi-cleavage fracture. The phase transformation and deformation mechanisms differed at two temperatures, with the martensite deformation contributing to the former, and austenite deformation to the latter. Orientations between the transformed martensite and its parent phase followed the K–S (Kurdjumov–Sachs) relationship.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
214 Mechanical engineering
216 Materials engineering
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), the International Scientific and Technological Cooperation Project from Science and Technology Department of Henan Province (172102410032), the Education Department of Henan Province (16A430005), and the Science and Technology Innovation Team of Henan University of Science and Technology (2015XTD006). W. Cao acknowledges the grant from the Academy of Finland and the financial support from the Center for Advance Steel Research (CASR), University of Oulu.
© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).