The influence of Co on creep deformation anisotropy in Ni-base single crystal superalloys at intermediate temperatures

H. Murakami, T. Yamagata, H. Harada, M. Yamazaki*

*この研究の対応する著者

研究成果: Article査読

28 被引用数 (Scopus)

抄録

In order to investigate the influence of Co on creep deformation anisotropy, some Ni-base single crystal superalloys have been creep tested at 800°C and 735 MPa. It is found that, although Co-containing alloys have higher creep resistance when the tensile direction is within 5° of 〈100〉, they are much more sensitive to tensile orientation than Co-free alloys, which have similar creep rupture lives for tensile orientations within 25° of 〈100〉. It is revealed that for Co-containing alloys the {111}〈112〉 slip system is operative during first-stage creep, when heterogeneous deformation occurs. Also, the degree of heterogeneous deformation correlates very well with creep rupture lives. It may thus be concluded that Co is not essential in improving creep rupture properties of Ni-base superalloys.

本文言語English
ページ(範囲)54-58
ページ数5
ジャーナルMaterials Science and Engineering A
223
1-2
DOI
出版ステータスPublished - 1997 2 28
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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