Orientation, Size, and Temperature Dependent Ductile Brittle Transition in NiAl Nanowire under Tensile Loading - A Molecular Dynamics Study


Autoria(s): Sutrakar, VK; Pillai, ACR; Mahapatra, Roy D
Data(s)

2014

Resumo

In the present paper, thermo-mechanical response of B2-NiAl nanowire along the < 100 >, < 110 >, and < 111 > orientations has been studied using molecular dynamics simulations. Nanowire with cross-sectional dimensions of similar to 20x20 angstrom(2), similar to 25x25 angstrom(2), and similar to 30x30 angstrom(2) and temperature range of 10 K-900 K has been considered. A Combined effect of size, orientation, and temperature on the stress-strain behavior under uniaxial tensile loading has been presented. It has been observed that < 111 > oriented NiAl nanowire that is energetically most stable gives highest yield stress which further reduces with < 110 > and < 100 > orientations. A remarkable ductile brittle transition (DBT) with an increase in temperature has also been reported for all the orientations considered in the present study. The DBT observed for the nanowire has also been compared with the reported DBT of bulk B2-NiAl obtained from experiments. Alternate technique has also been proposed to increase the toughness of a given material especially at lower temperature regions, i.e. below DBT.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/49740/1/def_sci_jou_64-2_179_2014.pdf

Sutrakar, VK and Pillai, ACR and Mahapatra, Roy D (2014) Orientation, Size, and Temperature Dependent Ductile Brittle Transition in NiAl Nanowire under Tensile Loading - A Molecular Dynamics Study. In: DEFENCE SCIENCE JOURNAL, 64 (2). pp. 179-185.

Publicador

DEFENCE SCIENTIFIC INFORMATION DOCUMENTATION CENTRE

Relação

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http://eprints.iisc.ernet.in/49740/

Palavras-Chave #Aerospace Engineering (Formerly, Aeronautical Engineering)
Tipo

Journal Article

PeerReviewed