• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Interphase-boundary structures and mechanical properties of two-phase ( / ) stainless steel bicrystals

Research Project

Project/Area Number 62550475
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Physical properties of metals
Research InstitutionKyoto University

Principal Investigator

MIURA Sei (1988)  Faculty of Engineering, Kyoto University, Professor, 工学部, 教授 (00066169)

橋本 敏 (1987)  京都大学, 工学部, 助教授 (50127122)

Co-Investigator(Kenkyū-buntansha) 三浦 精  京都大学, 工学部, 教授 (00066169)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1988: ¥300,000 (Direct Cost: ¥300,000)
KeywordsTwo-phase stainless steel / Multi-phase material / Interface / Bicrystal / Kurdjumov-Sachs orientation relationship / Diffusion bonding / Mechanical property / 異相界面 / Kurdjunov-Sachs関係 / 異相双結晶 / 拡散相変態 / γ / αステンレス鋼双結晶 / FCC / BCC相界面構造 / 拡散誘起双晶
Research Abstract

The morphology of two-phase ( / ) stainless steel couples, starting from Fe- 30Cr( -phase) and Fe-15Cr-15Ni( -phase) alloys produced by a solid-solid diffusion method has been investigated. Macroscopic units made of single crystals of the - and - phases (two-phase bicrystals) could be obtained. Interphase boundaries between a parent -phase and a transformed -phase have been found to be essentially planar and no special structual defects have been detected, excepting a so-called diffusion-induced twin faults grown often in the -phase due to the inevitable concentration gradient adjacent to the interphase boundary.
It is found that the transformed ( _n)-phase generally inherits the crystallographic orien-tation of the original ( _o)-phase in a similar manner to "Grain growth", when the initial bonding orientation relation is arbitrary. However, if the bonding orientation relation is set to be a near Kurjumov-Sachs relation which is a well-known preferential orientation relation between precipitate and matrix in this system, nucleation of the phase transformation ( ) occurs and the resulting orientation relations become closer to the preferential one. These facts mean that the critical condition for the occurrence of the "nucleation" may be attributable to the interfacial erergy criterion on the ( / )-interphase boundary and the grain-boundary between the _o - and _n - phases.
Study to reveal the relationship between structures and sliding behavior of the interphase boundary in two-phase ( / ) stainless steel bicrystals are in progress.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Satoshi Hashimoto: Fundamentals of Diffusion Bonding(Proc.of the 1st Seiken International Symposium,Tokyo,Japan). 191-210 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Satoshi Hashimoto: "A Method of Grain-Boundary Design and Control in Polycrystals" Fundamentals of Diffusion Bonding(Proc. of the 1st Seiken International Symposium, Tokyo, Japan). 191-210 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Satoshi Hashimoto: "Formation of the ( / )-Interphase Boundaries in FeCrNi Alloys by a Diffusion Bonding Method."

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Satoshi Hashimoto: "Interphase-Boundary Structures and Mechanical Properties of Two-Phase ( / ) Stainless Steel Bicrystals"

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Satoshi Hashimoto: Fundamentals of Diffusion Bonding(Proc.of the 1st Seikin International Symposium,Tokyo,Japan). 191-210 (1987)

    • Related Report
      1988 Annual Research Report
  • [Publications] S. HASHIMOTO and S. MIURA, Yoichi Ishida(ed.): "Fundamentals of Diffusion Bonding. Proceedings of the First Seiken International Symposium on Interface Structure, Propeities and Diffusion Bonding, Tokyo, Japan, 2-4 december 1985" Elsevier Amsterdsm, 511 (1987)

    • Related Report
      1987 Annual Research Report

URL: 

Published: 1988-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi