Effects of Microstructure on Mechanical Properties of HRS Processed SUS316L Stainless Steel

Fujiwara Hiroshi; Masashi  Nakatani; Yasuro Iwahashi; Kei Ameyama

doi:10.4028/www.scientific.net/AMR.26-28.421

Paper Titles

Evolution of Microstructure and Texture of Pure Al Single Crystal Having {112}<110> Orientation during Severe Plastic Deformation
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Characterization of Mg-Al Sheet Clad Materials Fabricated by Hot Rolling
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Mechanical Properties of Ultra-Fine Grained Fe-Cr-Ni Alloy Fabricated by ARB
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Extrudability and Bonding Strength of Copper Clad Aluminum Alloy Composites Produced by Indirect Extrusion Process
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Effects of Microstructure on Mechanical Properties of HRS Processed SUS316L Stainless Steel
p.421

Analysis of Surface Roughness of Immersion Sn Plating Film via Micro Etch Process
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Ring-Rolling Process for Manufacturing Ti-6Al-4V Plane and Profiled Ring-Products
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Dynamic Recrystallization during Hot Extrusion in Mg-3Al-0.1Y Alloy
p.433

Warm Forging Characteristics of AZ31 Alloy
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Effects of Microstructure on Mechanical Properties of HRS Processed SUS316L Stainless Steel

Abstract:

Mechanical milled SUS316L stainless steel powder is applied to hot roll sintering (HRS) process. Microstructure and mechanical properties of the HRS material is investigated. Microstructure of material produced by HRS process consists of the shell and core hybrid microstructure, that is, a shell structure with nano grains and a core structure with work-hardened coarse grains. The fine grain structure corresponding to the shell area has (austenite + sigma) nano duplex structure. Work-hardened structure in the core area composes of an austenite phase. The HRS material demonstrates not only superior strength but also enough elongation. Mechanical properties are strongly influenced by the shell/core structure, such as grain size, shell/core size and/or the volume fraction. The shell and core nano-duplex hybrid microstructure by the HRS process has been proved to be very effective to improve mechanical properties.