Observation of tension/compression asymmetry in an Nb-Al-V alloy

Huisheng Jiao; F Barradas; Tiesheng Rong; Ian Jones; Mark Aindow

doi:10.1016/j.msea.2004.01.139

Observation of tension/compression asymmetry in an Nb-Al-V alloy

Huisheng Jiao, F Barradas, Tiesheng Rong, Ian Jones, Mark Aindow

Metallurgy and Materials

Research output: Contribution to journal › Article

6 Citations (Scopus)

Abstract

Mechanical tests at room temperature have been performed on a B2 Nb-15Al-20V alloy and transmission electron microscopy (TEM) was used to examine the microstructures. The alloy exhibited a significant difference in deformation behavior between tension and compression. In tension, the alloy was brittle while in compression it exhibited very good ductility. This asymmetry can be explained by examining the dislocation structures after deformation. The Burgers vectors of the dislocations in tension were found to be 1/2(111) slipping on {110}. In compression the slip plane was determined to be {112}. The dislocations in tension exhibited a very low mobility and piled up dislocation arrays were easily seen. In compression, the dislocations showed good mobility and dislocation clusters also triggered the formation of pseudotwins, which is consistent with the mechanical properties. (C) 2004 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	476-480
Number of pages	5
Journal	Materials Science and Engineering A
Volume	387-389
DOIs	https://doi.org/10.1016/j.msea.2004.01.139
Publication status	Published - 1 Jan 2004

Keywords

dislocation
Nb-Al-V alloy
pseudotwin
asymmetry

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10.1016/j.msea.2004.01.139

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title = "Observation of tension/compression asymmetry in an Nb-Al-V alloy",

abstract = "Mechanical tests at room temperature have been performed on a B2 Nb-15Al-20V alloy and transmission electron microscopy (TEM) was used to examine the microstructures. The alloy exhibited a significant difference in deformation behavior between tension and compression. In tension, the alloy was brittle while in compression it exhibited very good ductility. This asymmetry can be explained by examining the dislocation structures after deformation. The Burgers vectors of the dislocations in tension were found to be 1/2(111) slipping on {110}. In compression the slip plane was determined to be {112}. The dislocations in tension exhibited a very low mobility and piled up dislocation arrays were easily seen. In compression, the dislocations showed good mobility and dislocation clusters also triggered the formation of pseudotwins, which is consistent with the mechanical properties. (C) 2004 Elsevier B.V. All rights reserved.",

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author = "Huisheng Jiao and F Barradas and Tiesheng Rong and Ian Jones and Mark Aindow",

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doi = "10.1016/j.msea.2004.01.139",

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T1 - Observation of tension/compression asymmetry in an Nb-Al-V alloy

AU - Jiao, Huisheng

AU - Barradas, F

AU - Rong, Tiesheng

AU - Jones, Ian

AU - Aindow, Mark

PY - 2004/1/1

Y1 - 2004/1/1

N2 - Mechanical tests at room temperature have been performed on a B2 Nb-15Al-20V alloy and transmission electron microscopy (TEM) was used to examine the microstructures. The alloy exhibited a significant difference in deformation behavior between tension and compression. In tension, the alloy was brittle while in compression it exhibited very good ductility. This asymmetry can be explained by examining the dislocation structures after deformation. The Burgers vectors of the dislocations in tension were found to be 1/2(111) slipping on {110}. In compression the slip plane was determined to be {112}. The dislocations in tension exhibited a very low mobility and piled up dislocation arrays were easily seen. In compression, the dislocations showed good mobility and dislocation clusters also triggered the formation of pseudotwins, which is consistent with the mechanical properties. (C) 2004 Elsevier B.V. All rights reserved.

AB - Mechanical tests at room temperature have been performed on a B2 Nb-15Al-20V alloy and transmission electron microscopy (TEM) was used to examine the microstructures. The alloy exhibited a significant difference in deformation behavior between tension and compression. In tension, the alloy was brittle while in compression it exhibited very good ductility. This asymmetry can be explained by examining the dislocation structures after deformation. The Burgers vectors of the dislocations in tension were found to be 1/2(111) slipping on {110}. In compression the slip plane was determined to be {112}. The dislocations in tension exhibited a very low mobility and piled up dislocation arrays were easily seen. In compression, the dislocations showed good mobility and dislocation clusters also triggered the formation of pseudotwins, which is consistent with the mechanical properties. (C) 2004 Elsevier B.V. All rights reserved.

KW - dislocation

KW - Nb-Al-V alloy

KW - pseudotwin

KW - asymmetry

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U2 - 10.1016/j.msea.2004.01.139

DO - 10.1016/j.msea.2004.01.139

M3 - Article

VL - 387-389

SP - 476

EP - 480

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

Observation of tension/compression asymmetry in an Nb-Al-V alloy

Abstract

Keywords

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