Cryogenic impact property of a high-strength-ductility 304L stainless steel with heterogeneous lamella structure

Jiansheng Li; Wei Cheng; Wenbo Qin; Ming Chen; Yu Zhao; Yusheng Li; Yufeng Sun; Qingzhong Mao

Journal of Materials Research and Technology (May 2023)

Cryogenic impact property of a high-strength-ductility 304L stainless steel with heterogeneous lamella structure

Jiansheng Li,
Wei Cheng,
Wenbo Qin,
Ming Chen,
Yu Zhao,
Yusheng Li,
Yufeng Sun,
Qingzhong Mao

Affiliations

Jiansheng Li: Anhui Key Laboratory of High-Performance Non-Ferrous Metal Materials, Anhui Polytechnic University, Wuhu, 241000, PR China; Corresponding author.
Wei Cheng: Anhui Key Laboratory of High-Performance Non-Ferrous Metal Materials, Anhui Polytechnic University, Wuhu, 241000, PR China
Wenbo Qin: School of Engineering and Technology, China University of Geosciences (Beijing), Beijing, 100083, PR China; Corresponding author.
Ming Chen: Anhui Key Laboratory of High-Performance Non-Ferrous Metal Materials, Anhui Polytechnic University, Wuhu, 241000, PR China
Yu Zhao: Anhui Key Laboratory of High-Performance Non-Ferrous Metal Materials, Anhui Polytechnic University, Wuhu, 241000, PR China
Yusheng Li: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
Yufeng Sun: Anhui Key Laboratory of High-Performance Non-Ferrous Metal Materials, Anhui Polytechnic University, Wuhu, 241000, PR China
Qingzhong Mao: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China; Corresponding author.

Journal volume & issue: Vol. 24
pp. 1401 – 1409

Abstract

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A high-strength-ductility 304L stainless steel with heterogeneous lamella structure (HLS) was fabricated by cold rolling and subsequent partial recrystallization. The HLS was composed of lamellar recrystallized grains (mean grain size of ∼4.1 μm) embedded in a hard matrix of ultra-fine grains (mean grain size of ∼0.65 μm) and dislocation-cell structure. It exhibited a superior cryogenic impact property compared with coarse-grained, fine-grained and cold-rolled 304L stainless steels. This was mainly attributed to the suppression of crack propagation by lamellar recrystallized grains, dislocation-cell structure and TRIP effect. In addition, the extra fracture energy was also caused by the delamination in ultra-fine grains. This work will give an important theoretical guidance for the cryogenic applications of the HLS 304L stainless steel.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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