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Licensed Unlicensed Requires Authentication Published by De Gruyter December 4, 2019

Atomistic study of fracture behavior of metallic glass fiber reinforced metal-matrix nanocomposite during bending creep deformation process

Paper presented at the “International Conference on Processing and Characterization of Materials 2018, ICPCM 2018”, 6–8 December 2018, Rourkela, India

K. Vijay Reddy and Snehanshu Pal

Abstract

In the present work, the effect of reinforcement fiber diameter on elevated temperature bending creep deformation behavior of metal matrix composite is studied. Bending creep tests have been performed on Ni nanocomposite considering different fiber diameters using molecular dynamics simulations. Common neighbor analysis and dislocation analysis have been performed to analyze the deformation behavior and its underlying mechanism at the atomic scale during the bending creep process. Results have revealed that the specimen having thinner fiber exhibits better creep properties and higher plasticity due to the combined influence of shear band interactions and work softening. Whereas, work hardening and twin-detwin mechanisms are responsible for the quasi-cleavage fracture of the specimen having 4 nm diameter fiber.


Correspondence address, Dr. Snehanshu Pal, Department of Metallurgical and Materials Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, 769008, India, Email: , , Tel: +91-661-2462573, Fax: +91-661-2462550

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Received: 2019-01-20
Accepted: 2019-05-24
Published Online: 2019-12-04
Published in Print: 2019-12-10

© 2019, Carl Hanser Verlag, München