期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 17, 期 -, 页码 404-411出版社
ELSEVIER
DOI: 10.1016/j.jmrt.2021.12.117
关键词
Micro; nano-structure; 304 stainless steel; Strength-plasticity; Heterogeneous composite structure
资金
- National Natural Science Foundation of China [51911530119]
- Department of Education of Gansu Province Innovation Fund [2021A-023]
- Open Project Fund of Gansu Key Laboratory of Solar Power System Engi-neering Project [2021SPEK01]
- Scientific Research and Development Guidance Fund of Lanzhou Univerisity of Technology [19062034]
Micro/nano-structured 304 stainless steel, prepared by aluminothermic reaction and subsequent rolling and annealing, exhibits excellent strength and ductility, providing a novel approach for optimizing the mechanical properties of engineering materials.
Micro/nano-structure is one of the important types of multilayer construction, which can make nanocrystalline metals and alloys with excellent comprehensive mechanical properties. By means of Aluminothermic Reaction (AR) and subsequent rolling with deformation of 50% at room temperature (RT) and followed by annealed at 973 K for 1 h, a heterogeneous composite structure of micro/nano-structured 304 stainless steel (SS) is obtained. Such a stainless steel specimen exhibits a tensile strength as high as 1023 MPa and an elongation-to-failure of about 27.3%. In the process, the much elevated strength originates from martensite strengthening, austenite grain refinement and dislocation density increasing, while ductility promotes from the recrystallization of deformed austenite and recovery of strain induced martensite. Superior strength-ductility combination achieves in micro/nano-structured 304 SS, which demonstrates a novel approach for optimizing the mechanical properties in engineering materials. (c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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