Phase transformations in the B2 phase of Co-rich Co-Al binary alloys

K. Niitsu, T. Omori, M. Nagasako, K. Oikawa, R. Kainuma, K. Ishida

研究成果: Article査読

10 被引用数 (Scopus)

抄録

Phase transformations in the β (B2) phase of Co-21 and -23 at.% Al alloys were examined using transmission electron microscopy, energy dispersive X-ray spectroscopy and differential scanning calorimetry. The microstructures obtained from as-quenched specimens were found to be strongly affected by the quenching condition. While relatively thick sheet-specimens with a lower quenching rate showed bainitic plate precipitates with a fcc structure, a martensite-like structure was observed by optical microscopy in relatively thin specimens with a higher quenching rate. Regardless of the quenching condition, a spinodal-like microstructure composed of A2 and B2 phases was also detected and the A2 phase changed to a metastable hcp phase during further aging.

本文言語English
ページ(範囲)2697-2702
ページ数6
ジャーナルJournal of Alloys and Compounds
509
6
DOI
出版ステータスPublished - 2011 2 10

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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