Young-Kyun Kim , Sang Hun Shim , Yong Keun Kim, Ka Ram Lim, Young-Sang Na
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Simultaneously improved strength and ductility yet strain-hardenable 316L stainless steel by sigma phase and hetero-structuring
In this study, we produced both homogeneous and heterogeneous-structured 316L austenitic stainless steels (SSs), each exhibiting comparable levels of yield strength (YS). Despite their similar YS, the heterogeneous-structured 316L SS exhibits a significantly higher tensile strength of ∼1 GPa compared to the homogeneous-structured 316L SS (∼832 MPa), and slightly higher fracture strain. The enhanced tensile strength and work hardening behavior in the heterogeneous-structured 316L SS were mainly attributed to the hetero-deformation induced (HDI) hardening, accelerated deformation-induced martensitic transformation (DIMT), and the presence of the nano-sized σ-phase particles. Our findings provide insights into the development of metastable heterogeneous-structured face-centered cubic (FCC) metallic materials with outstanding mechanical properties.
期刊介绍：
Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry.
The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.
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