J041013 Effect of Grain Refinement on Mechanical Properties of A7N01 Alloy.

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  • KUSUHARA Hiroaki
    Graduate School of Mechanical Science and Engineering, Chiba Institute of Technology
  • NODA Masafumi
    Depertment of Mechanical Science and Engineering, Chiba Institute of Technology
  • MORI Hisashi
    Railway Technical Research Institute
  • FUNAMI Kunio
    Depertment of Mechanical Science and Engineering, Chiba Institute of Technology

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Other Title
  • J041013 A7N01合金の機械的特性に及ぼす組織微細化の影響

Description

A7N01 alloy is utilized in high-speed train because of its good formability and weldability. The weight reduction of these vehicles is possible by improving the strength of these materials. This study examined the effect of the mechanical properties of fine grain structures which are formed by a combination of heat treatment and severe plastic deformation such as forging and rolling and the role of fine grain structure to plastic formability. As a result, 0.2% proof stress and tensile strength of heat treatment and multi-axial alternative forging (MAF) processed materials showed both more than 450MPa. For these material, further cold rolled in addition, 0.2% proof stress and the tensile strength shows more than 500MPa together. In order to improve the strength on A7N01 alloy, it was confirmed that grain refinement of structure was effective.

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