The formation of {alpha}{double_prime}-phase in Zr-Re alloys

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(96)00190-X· OSTI ID:367256

Dobromyslov, A V; Taluts, N I ^[1]

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1. Ural Division of Russian Academy of Sciences, Ekaterinburg (Russian Federation). Inst. of Metal Physics

It is known that in quenched titanium-base alloys containing an adequate amount of {beta}-stabilizing element, the orthorhombic {alpha}{double_prime}-phase is formed. This phase is observed in many binary alloys of titanium with metals of V-VIII groups of the Periodic Table. In zirconium-base alloys, however, the formation of the {alpha}{double_prime}-phase was found only in Zr-Mo alloys. Two factors prevent the formation of the {alpha}{double_prime}-phase in zirconium-base alloys: the eutectoid decomposition of the {beta}-phase and the formation of the metastable {omega}-phase. As compared to titanium-base alloys, the {omega}-phase is formed in zirconium-base alloys with smaller concentrations of {beta}-stabilizing elements, and the rate of the eutectoid decomposition is higher in zirconium alloys than in corresponding titanium alloys. Therefore, the formation of the {alpha}{double_prime}-phase in zirconium alloys should depend not only on the content of the alloying element but also on the cooling rate. It was supposed in that the {alpha}{double_prime}-phase would most probably be found in zirconium alloys with tantalum, rhenium, and tungsten. In the present work, the authors study the structure of quenched Zr-Re alloys in order to reveal the orthorhombic {alpha}{double_prime}-phase.

• OSTI ID: 367256
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 5 Vol. 35; ISSN 1359-6462; ISSN XZ503X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL COMPOSITION
ETCHING
HEAT TREATMENTS
MELTING
OPTICAL MICROSCOPY
PHASE STUDIES
PHASE TRANSFORMATIONS
QUENCHING
RHENIUM ALLOYS
ROLLING
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ZIRCONIUM BASE ALLOYS