| Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure | |
| Lei, Y. B.1,2; Wang, Z. B.1; Xu, J. L.1; Lu, K.1 | |
| Corresponding Author | Wang, Z. B.(zbwang@imr.ac.cn) |
| 2019-04-15 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 168Pages:133-142 |
| Abstract | A gradient nanostructured (GNS) surface layer with full austenitic phase was synthesized on AISI 316L stainless steel by surface mechanical rolling treatment at -280 degrees C. The mean grain size is similar to 45 nm at the top surface and increases gradually with depth. Deformation-induced martensite (DIM) transformation was suppressed and the microstructural refinement was dominated by dislocation activities and twinning during the formation of the GNS layer. Axial tension-compression fatigue tests showed that fatigue strength and life are simultaneously enhanced in the GNS samples relative to the corresponding coarse-grained counterparts in both stress- and strain-controlled tests. This is very different from fatigue behavior of conventional nanostructured materials, i.e. an enhanced stress-controlled fatigue strength with a decreased strain-controlled fatigue life. Besides contributions from the enhanced mechanical properties and the suppressed surface defects formation, analyses of fatigue mechanisms demonstrated that the promoted formation of DIM during cyclic strain plays a crucial role in enhancing fatigue properties of the GNS samples in strain-controlled tests. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Keyword | Gradient nanostructured Surface mechanical rolling treatment AISI 316L stainless steel Strain-controlled fatigue Deformation-induced martensite |
| Funding Organization | National Key Research and Development Program of China ; Shenyang National Laboratory for Materials Science |
| DOI | 10.1016/j.actamat.2019.02.008 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2017YFA0204401] ; National Key Research and Development Program of China[2017YFA0204403] ; Shenyang National Laboratory for Materials Science[2015RP04] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000464086500012 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/132914 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Z. B. |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China |
| Recommended Citation GB/T 7714 | Lei, Y. B.,Wang, Z. B.,Xu, J. L.,et al. Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure[J]. ACTA MATERIALIA,2019,168:133-142. |
| APA | Lei, Y. B.,Wang, Z. B.,Xu, J. L.,&Lu, K..(2019).Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure.ACTA MATERIALIA,168,133-142. |
| MLA | Lei, Y. B.,et al."Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure".ACTA MATERIALIA 168(2019):133-142. |
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