Effect of prior cold rolling on α precipitation in a Ti-15V-3Cr-3Sn-3Al alloy

T. Furuhara, H. Nakamori, S. Takagi, T. Maki

Research output: Contribution to conferencePaperpeer-review

5 Citations (Scopus)

Abstract

The effect of prior cold rolling on α(hcp) precipitation from the β(bcc) matrix in a Ti-15V-3Cr-3Sn-3Al alloy has been studied. In the specimen directly aged, α precipitation occurs preferentially at β grain boundaries and proceeds into the interior of β grains. Grain boundary α precipitates tend to form a film-like structure along the grain boundary because of the restriction of crystallographic variants. On the other hand, in the specimens slightly cold rolled and aged, α precipitates form preferentially on the dislocations in the coarse slip bands. In a single slip band, α precipitates exhibit the same morphology and hold a single variant of the Burgers orientation relationship. Furthermore, the intersections of slip bands with the grain boundary act as preferential nucleation sites of α precipitates. The α precipitates formed at the deformed portion of a grain boundary exhibit different crystallographic variants from those at the undeformed portions of the same boundary. In the heavily rolled specimen, a very fine dispersion of α precipitates is obtained, resulting in the (α+β) microduplex structure.

Original languageEnglish
Pages173-180
Number of pages8
Publication statusPublished - 1994 Dec 1
Externally publishedYes
EventProceedings of the 1st International Symposium on Metallurgy and Technology of Practical Titanium Alloys - Chiba, Jpn
Duration: 1993 Dec 71993 Dec 10

Other

OtherProceedings of the 1st International Symposium on Metallurgy and Technology of Practical Titanium Alloys
CityChiba, Jpn
Period93/12/793/12/10

ASJC Scopus subject areas

  • Engineering(all)

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