Crystallography of α Phase Precipitated on Dislocations and Deformation Twin Boundaries in a β Titanium Alloy

Tadashi Furuhara, Hideyuki Nakamori, Tadashi Maki

研究成果: Article査読

50 被引用数 (Scopus)

抄録

Crystallographic orientation relationships of α phases precipitated on dislocations and deformation twin boundaries in the β matrix have been investigated in a Ti–15V–3Cr–3Sn–3Al alloy, by means of transmission electron microscopy (TEM). Planar and widely spaced, {112}⟨111⟩β slip bands are formed by weak rolling at room temperature after being solutionized. By the subsequent aging at 933 K, α plates precipitate preferentially on the dislocations in the slip bands. In the same slip bands, α plates select particular variants of the Burgers orientation relationship. The selectivity of variants was discussed in terms of the effective relaxation of the transformation strain by the stress field associated with the dislocation. By subzero rolling at 77 K, {332}⟨113⟩β deformation twins are produced. By the subsequent aging at 933 K, α phases precipitate on the twin boundaries, holding the Burgers orientation relationships with respect to both of the β matrix and the twin. It is considered that the α nucleus forms coherently with both of the β phases to reduce the energy of the α/β interface newly formed.

本文言語English
ページ(範囲)585-595
ページ数11
ジャーナルMaterials Transactions, JIM
33
6
DOI
出版ステータスPublished - 1992
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)

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