The location of atoms in Re- and V-containing multicomponent nickel-base single-crystal superalloys

H. Murakami*, H. Harada, H. K.D.H. Bhadeshia

*この研究の対応する著者

研究成果: Article査読

50 被引用数 (Scopus)

抄録

The atomic structure of some Ni-base single-crystal superalloys has been investigated using atom-probe field ion microscopy (APFIM) and the results compared with numerical estimations obtained from the alloy design program (ADP) and the cluster variation method (CVM). Re-containing CMSX4 and V-containing RR2000 alloys, together with TMS63 are the subjects of this study. It is found that Ti, Ta and Hf have a strong preference for the γ′ phase, whereas Cr, Co, W, Re and Mo tend to dissolve in the γ phase. V has a very weak preference for the γ phase. The results agree very well with both ADP and CVM. The APFIM analyses have also revealed that Re atoms in CMSX4 tend to preferentially occupy the sites normally designated for Al atoms in the γ′ phase. It is demonstrated that the site occupancy of other alloying elements such as Ta, W, Mo and Co can be estimated accurately using CVM, although there are some discrepancies for the distributions of Cr, Ti and Ni. The effect of solute atom distribution on creep properties is discussed briefly.

本文言語English
ページ(範囲)177-183
ページ数7
ジャーナルApplied Surface Science
76-77
C
DOI
出版ステータスPublished - 1994 3 2
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 物理学および天文学(全般)
  • 表面および界面
  • 表面、皮膜および薄膜

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