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Effect of Temperature and Strain Rate Variation on Tensile Properties of a Defective Nanocrystalline Copper-Tantalum Alloy

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Title Effect of Temperature and Strain Rate Variation on Tensile Properties of a Defective Nanocrystalline Copper-Tantalum Alloy
 
Creator Gupta, Mahesh Kumar
Mahapatra, Rajendra Prasad
Panwar, Vinay
 
Subject Mechanical properties
Molecular dynamics
Point defect
Modeling and simulation
Vacancy
 
Description 358-366
Nanocrystalline alloys of immiscible in nature are emerging topics of interest for researchers due to better mechanical
stability at high temperatures. Nanocrystalline Copper-Tantalum alloy is of particular interest for research exploration due to
its high strength, limited solubility and high-temperature stability. In the present work, the mechanical properties of
nanocrystalline 90/10 copper-tantalum (9Cu-Ta) alloy have been investigated using the molecular dynamics approach.
Embedded atom method (EAM) of potential has been used to analyze the mechanical properties at high temperatures due to
the high stability of EAM in molecular dynamic simulation. At high-temperature defects plays a very important role
therefore a specific 9Cu-Ta nanostructure having 3% vacancies has been selected to explore its performance under a
particular type of point defect. This study has been conducted under uniaxial tensile loading. The tensile properties of this
defective nanocrystalline alloy have been compared at specific temperatures i.e. 300 K, 600 K, 800 K, 1000 K and 1200 K.
The study revealed that the variation in temperature from 300 K to 1200 K results in the shifting of the stress-strain graph to
lower stress values. It has also been noticed that the variation in ultimate tensile strength is the least in comparison to yield
strength and elastic constant for the same variation in temperature. These results indicate the importance of avoiding thermal
agitations during the synthesis and surface modification of nanocrystalline copper-tantalum alloy.
 
Date 2022-04-05T11:48:49Z
2022-04-05T11:48:49Z
2022-04
 
Type Article
 
Identifier 0975-1084 (Online); 0022-4456 (Print)
http://nopr.niscair.res.in/handle/123456789/59438
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source JSIR Vol.81(04) [April 2022]