期刊
SCRIPTA MATERIALIA
卷 221, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2022.114989
关键词
Laser-cladding; Directed energy deposition; Twinning; Heterogeneous structure; Stainless steel
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF- 2022R1A5A1030054, NRF-2021R1A2C3006662]
- National Research Foundation of Korea (NRF) - Ministry of Education [2022R1A6A3A13073830, 2021R1A6A3A03044109]
- Basic Science Research Program through the National Research Foun - Ministry of Education [2021R1A6A3A03044109]
- National Research Foundation of Korea [2022R1A6A3A13073830, 2021R1A6A3A03044109] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study focuses on a new strategy for designing heterostructured laser-clad materials with dynamically reinforceable heterogeneity introduced through texture-engineering, achieving superior mechanical properties.
Heterostructured materials produced by surface modification have attracted considerable attention owing to their exceptional mechanical properties. Laser-cladding is one of the promising processes to achieve hetero-structures by creating a sandwich structure through a simple process. Herein, we propose a new strategy for designing heterostructured laser-clad materials containing dynamically reinforceable heterogeneity introduced through texture-engineering. The specific processing parameters for laser-cladding of 316L stainless steel were selected to induce a predominant crystallographic orientation favorable for twinning. The textured laser-clad alloy showed different textures between the coating and substrate regions, which exhibited a preferential orientation of < 111 > and < 100 >, respectively, along the loading direction. Plastic incompatibility was inten-sified due to the heterogeneous structure caused by the high dislocation density and localized deformation twinning in the coating region. Consequently, the present laser-clad alloys exhibited superior strength-ductility synergy compared to the other homogeneous materials, owing to the substantial hetero-deformation-induced hardening.
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