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Effect of geometrical distribution of sub-grain boundaries on creep properties of Ni-based superalloys

Research Project

Project/Area Number 24656411
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Structural/Functional materials
Research InstitutionKobe University

Principal Investigator

TANAKA Katsushi  神戸大学, 大学院・工学研究科, 教授 (30236575)

Project Period (FY) 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Keywords超合金 / クリープ変形 / デンドライト境界 / 幾何的必要転位 / 引張圧縮非対称性
Research Abstract

Geometrically required dislocations are distributed at sub-grain boundaries that corresponds to interfaces of dendrites grown in Ni-based superalloys. In the present study, we have performed compressive creep tests to observe the development of creep dislocation networks at gamma/gamma-prime interfaces, and of parallel raft structure. When a compressive stress is applied along tothe growth direction, the magnitude of primary creep is very small compared with that applied perpendicular to the growth direction. We have constructed a creep testing machine that can use a very small specimen without dislocation networks in it.

Report

(2 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (2 results)

All Other

All Remarks (2 results)

  • [Remarks]

    • URL

      http://mm4.scitec.kobe-u.ac.jp/

    • Related Report
      2012 Final Research Report
  • [Remarks] 研究室ホームページ

    • URL

      http://mm4.scitec.kobe-u.ac.jp/

    • Related Report
      2012 Annual Research Report

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Published: 2013-05-31   Modified: 2019-07-29  

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