Improvement of mechanical properties in SUS304L steel through the control of bimodal microstructure characteristics

被引：190
作者：
Zhang, Zhe [1 ]
Vajpai, Sanjay Kumar [2 ]
Orlov, Dmitry [2 ]
Ameyama, Kei [3 ]
机构：
[1] Ritsumeikan Univ, Dept Mech Engn, Grad Sch Sci & Engn, Kusatsu, Shiga 5258577, Japan
[2] Ritsumeikan Univ, Res Org Sci & Technol, Kusatsu, Shiga 5258577, Japan
[3] Ritsumeikan Univ, Fac Sci & Engn, Dept Mech Engn, Kusatsu, Shiga 5258577, Japan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 598卷
基金：
日本科学技术振兴机构;
关键词：
Stainless steel; Microstructure design; Bimodal grain structure; Harmonic structure; Mechanical property; 304L STAINLESS-STEEL; AL-MG ALLOY; GRAIN-SIZE; PLASTIC-DEFORMATION; TENSILE PROPERTIES; HARMONIC STRUCTURE; PURE TITANIUM; HIGH-STRENGTH; DUCTILITY; NANOCRYSTALLINE;
D O I：
10.1016/j.msea.2014.01.023
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The present work deals with achieving improvement in the mechanical properties of SUS304L stainless steel through the application of a unique microstructure design termed as 'Harmonic structure', and establishing a co-relationship between various microstructural characteristics and mechanical properties. Harmonic structure essentially means a bimodal grain size distribution with a specific periodic arrangement of coarse- and ultrafine-grain fractions. SUS304L stainless steel samples having such microstructure were fabricated by a powder metallurgy route involving the mechanical milling of pre-alloyed steel powder followed by spark plasma sintering. Due to these peculiar microstructural characteristics, the harmonic-structured SUS304L stainless steels demonstrated a winning combination of high strength, large uniform elongation, and large total elongation to failure, simultaneously. It was also found that the fraction of a shell area (a three-dimensional continuously connected network of ultrafine-grained structure) is an important parameter controlling the balance of the mechanical properties of the harmonic-structured SUS304L steel compacts. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：106 / 113
页数：8
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