High Temperature Fatigue Life Analysis of Single Crystal Ni-Base Superalloys Considering .GAMMA./.GAMMA.' Microstructure

• SAKAGUCHI Motoki

  Nagaoka Univ. of Tech.

• OKAZAKI Masakazu

  Dept. of Mech. Eng., Nagaoka Univ. of Tech.

Bibliographic Information

Other Title

• γ／γ′微細構造を考慮した単結晶Ｎｉ基超合金の高温疲労特性評価
• γ/γ'微細構造を考慮した単結晶Ni基超合金の高温疲労特性評価
• ガンマ ガンマ ビサイ コウゾウ オ コウリョ シタ タンケッショウ Niキ チョウゴウキン ノ コウオン ヒロウ トクセイ ヒョウカ

Abstract

Strain controlled thermo-mechanical fatigue (TMF) and low cycle fatigue (LCF) tests were conducted in a single crystal Ni-based superalloy, CMSX-4, under various test conditions. At first, it was shown ex-perimentally that the superalloy revealed the TMF and LCF lives associated with some unique charac-teristics, which were not always interpreted well, so far as the traditional stress-based and/or strain-based criteria were employed : e.g., Manson-Coffin law and Ostergren method. New micromechanics model is proposed to estimate the TMF and LCF lives taking account of the unique microstructure of superalloys. The proposed method enabled us to estimate some unique characteristics in the TMF and LCF failures of superalloys, although some quantitative hurdles should be overcome further.

Journal

• Journal of the Society of Materials Science, Japan

  Journal of the Society of Materials Science, Japan 55 (3), 309-316, 2006

  The Society of Materials Science, Japan

Keywords

• Single crystal Ni-base superalloy
• Low cycle fatigue
• Thermo-mechanical fatigue
• γ/γ' microstructure
• Eshelby's micromechanics theory
• Mori-Tanaka’s theory
• Plastic work

Details

• CRID: 1390282680395305472
• NII Article ID: 110006570918
• NII Book ID: AN00096175
• DOI: 10.2472/jsms.55.309
• ISSN: 18807488
• ISSN: 05145163
• NDL BIB ID: 7884966
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7884966
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed