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

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Observation of tension/compression asymmetry in an Nb-Al-V alloy. / Jiao, Huisheng; Barradas, F; Rong, Tiesheng; Jones, Ian; Aindow, Mark.

In: Materials Science and Engineering A, Vol. 387-389, 01.01.2004, p. 476-480.

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@article{96fdb0250de6476eae7a93c14b76ec16,
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.",
keywords = "dislocation, Nb-Al-V alloy, pseudotwin, asymmetry",
author = "Huisheng Jiao and F Barradas and Tiesheng Rong and Ian Jones and Mark Aindow",
year = "2004",
month = jan,
day = "1",
doi = "10.1016/j.msea.2004.01.139",
language = "English",
volume = "387-389",
pages = "476--480",
journal = "Materials Science and Engineering A",
issn = "0921-5093",
publisher = "Elsevier",

}

RIS

TY - JOUR

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

UR - http://www.scopus.com/inward/record.url?scp=10444253971&partnerID=8YFLogxK

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

SN - 0921-5093

ER -