Phase stability of β phase in TiAl intermetallics

N. Masahashi; Y. Mizuhara

Phase stability of β phase in TiAl intermetallics

N. Masahashi, Y. Mizuhara

IMR - Cooperative Research and Development Center for Advanced Materials

University of Cambridge

Research output: Contribution to conference › Paper › peer-review

1 Citation (Scopus)

Abstract

The stability of the β phase in Cr-containing Ti-Al ternary alloys was investigated. Chromium was enriched in the α₂ and β following heat treatment. Thermomechanical processing (TMP) resulted in the precipitation of a Cr-enriched β (B2) at grain boundaries. Upon subsequent heat treatment, the β phase transformed to α₂+γ, accompanied by a lowering of the Cr enrichment in the α₂. Thus, TMP followed by heat treatment is a minimum requirement for equilibration. The oxygen deteriorating room temperature deformability was confirmed to be located in the α₂ but not in the β. Stabilization of the β phase was achieved by the addition of Group VI_a elements.

Original language	English
Pages	165-172
Number of pages	8
Publication status	Published - 1995
Event	Proceedings of the 1995 124th TMS Annual Meeting - Las Vegas, NV, USA Duration: 1995 Feb 13 → 1995 Feb 16

Conference

Conference	Proceedings of the 1995 124th TMS Annual Meeting
City	Las Vegas, NV, USA
Period	95/2/13 → 95/2/16

Cite this

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title = "Phase stability of β phase in TiAl intermetallics",

abstract = "The stability of the β phase in Cr-containing Ti-Al ternary alloys was investigated. Chromium was enriched in the α2 and β following heat treatment. Thermomechanical processing (TMP) resulted in the precipitation of a Cr-enriched β (B2) at grain boundaries. Upon subsequent heat treatment, the β phase transformed to α2+γ, accompanied by a lowering of the Cr enrichment in the α2. Thus, TMP followed by heat treatment is a minimum requirement for equilibration. The oxygen deteriorating room temperature deformability was confirmed to be located in the α2 but not in the β. Stabilization of the β phase was achieved by the addition of Group VIa elements.",

author = "N. Masahashi and Y. Mizuhara",

year = "1995",

language = "English",

pages = "165--172",

note = "Proceedings of the 1995 124th TMS Annual Meeting ; Conference date: 13-02-1995 Through 16-02-1995",

}

TY - CONF

T1 - Phase stability of β phase in TiAl intermetallics

AU - Masahashi, N.

AU - Mizuhara, Y.

PY - 1995

Y1 - 1995

N2 - The stability of the β phase in Cr-containing Ti-Al ternary alloys was investigated. Chromium was enriched in the α2 and β following heat treatment. Thermomechanical processing (TMP) resulted in the precipitation of a Cr-enriched β (B2) at grain boundaries. Upon subsequent heat treatment, the β phase transformed to α2+γ, accompanied by a lowering of the Cr enrichment in the α2. Thus, TMP followed by heat treatment is a minimum requirement for equilibration. The oxygen deteriorating room temperature deformability was confirmed to be located in the α2 but not in the β. Stabilization of the β phase was achieved by the addition of Group VIa elements.

AB - The stability of the β phase in Cr-containing Ti-Al ternary alloys was investigated. Chromium was enriched in the α2 and β following heat treatment. Thermomechanical processing (TMP) resulted in the precipitation of a Cr-enriched β (B2) at grain boundaries. Upon subsequent heat treatment, the β phase transformed to α2+γ, accompanied by a lowering of the Cr enrichment in the α2. Thus, TMP followed by heat treatment is a minimum requirement for equilibration. The oxygen deteriorating room temperature deformability was confirmed to be located in the α2 but not in the β. Stabilization of the β phase was achieved by the addition of Group VIa elements.

UR - http://www.scopus.com/inward/record.url?scp=0029459897&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029459897&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0029459897

SP - 165

EP - 172

T2 - Proceedings of the 1995 124th TMS Annual Meeting

Y2 - 13 February 1995 through 16 February 1995

ER -

Phase stability of β phase in TiAl intermetallics

Abstract

Conference

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