The microstructural evolution of NbAlV and ternary alloys

Huisheng Jiao; Fernando Barradas-Olmos; Tiesheng Rong; Ian Jones; Mark Aindow

doi:10.1016/j.intermet.2005.02.011

The microstructural evolution of NbAlV and ternary alloys

Huisheng Jiao, Fernando Barradas-Olmos, Tiesheng Rong, Ian Jones, Mark Aindow

Metallurgy and Materials

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6 Citations (Scopus)

Abstract

The microstructural evolution during annealing of a series of Nb-Al-V alloys has been studied using electron microscopy. A modified isothermal section of the Nb-Al-V ternary phase diagram is presented. The B2 phase is prominent in the as-cast alloys. On annealing, needle-like A15 particles precipitate in the metastable B2 phase around the grain boundaries. These then spread throughout the grains. The transformation process is very slow when the alloys are annealed below 1273 K due to the difficulty of nucleation. Cold working before annealing can increase effectively the A15 nucleation rate and refine the microstructure. (c) 2005 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	1157-1165
Number of pages	9
Journal	Intermetallics
Volume	13
DOIs	https://doi.org/10.1016/j.intermet.2005.02.011
Publication status	Published - 1 Nov 2005

Keywords

niobium alummides
phase transformations
microstructure
defects : dislocation geometry and arrangement
phase diagram, prediction

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10.1016/j.intermet.2005.02.011

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title = "The microstructural evolution of NbAlV and ternary alloys",

abstract = "The microstructural evolution during annealing of a series of Nb-Al-V alloys has been studied using electron microscopy. A modified isothermal section of the Nb-Al-V ternary phase diagram is presented. The B2 phase is prominent in the as-cast alloys. On annealing, needle-like A15 particles precipitate in the metastable B2 phase around the grain boundaries. These then spread throughout the grains. The transformation process is very slow when the alloys are annealed below 1273 K due to the difficulty of nucleation. Cold working before annealing can increase effectively the A15 nucleation rate and refine the microstructure. (c) 2005 Elsevier Ltd. All rights reserved.",

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author = "Huisheng Jiao and Fernando Barradas-Olmos and Tiesheng Rong and Ian Jones and Mark Aindow",

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T1 - The microstructural evolution of NbAlV and ternary alloys

AU - Jiao, Huisheng

AU - Barradas-Olmos, Fernando

AU - Rong, Tiesheng

AU - Jones, Ian

AU - Aindow, Mark

PY - 2005/11/1

Y1 - 2005/11/1

N2 - The microstructural evolution during annealing of a series of Nb-Al-V alloys has been studied using electron microscopy. A modified isothermal section of the Nb-Al-V ternary phase diagram is presented. The B2 phase is prominent in the as-cast alloys. On annealing, needle-like A15 particles precipitate in the metastable B2 phase around the grain boundaries. These then spread throughout the grains. The transformation process is very slow when the alloys are annealed below 1273 K due to the difficulty of nucleation. Cold working before annealing can increase effectively the A15 nucleation rate and refine the microstructure. (c) 2005 Elsevier Ltd. All rights reserved.

AB - The microstructural evolution during annealing of a series of Nb-Al-V alloys has been studied using electron microscopy. A modified isothermal section of the Nb-Al-V ternary phase diagram is presented. The B2 phase is prominent in the as-cast alloys. On annealing, needle-like A15 particles precipitate in the metastable B2 phase around the grain boundaries. These then spread throughout the grains. The transformation process is very slow when the alloys are annealed below 1273 K due to the difficulty of nucleation. Cold working before annealing can increase effectively the A15 nucleation rate and refine the microstructure. (c) 2005 Elsevier Ltd. All rights reserved.

KW - niobium alummides

KW - phase transformations

KW - microstructure

KW - defects : dislocation geometry and arrangement

KW - phase diagram, prediction

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DO - 10.1016/j.intermet.2005.02.011

M3 - Article

VL - 13

SP - 1157

EP - 1165

JO - Intermetallics

JF - Intermetallics

ER -

The microstructural evolution of NbAlV and ternary alloys

Abstract

Keywords

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