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Shear band widening mechanism in Ti–6Al–4V under high strain rate deformation

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journal contribution
posted on 19.11.2020, 14:24 authored by Anuj Bisht, Subhash Kumar, Ka Ho Pang, Rongxin Zhou, Anish RoyAnish Roy, Vadim SilberschmidtVadim Silberschmidt, Satyam Suwas
In this study, mechanical properties and microstructural investigation of Ti64 at high strain rate are studied using a split-Hopkinson pressure bar method under compression for temperatures up to 800 °C. Flow softening in the mechanical response of material to such loading conditions hints at instability in compression, which increases with an increase in temperature. Microstructural characterization of the deformed material is characterized using the electron-backscattered diffraction technique. It reveals the presence of instabilities in Ti64 in the form of a fine network of shear bands. The shear band width grows with an increase in temperature along with the area fraction of shear band in the material, displaying its improved capacity to contain microstructural instabilities at higher temperature. After a detailed microstructural investigation, a mechanism for shear band widening is proposed. Based on this mechanism, a path generating nuclei within shear bands is discussed.

Funding

MAST: Modelling of advanced materials for simulation of transformative manufacturing processes

Engineering and Physical Sciences Research Council

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Department of Science and Technology (India) through grant number DST/RC-Uk/14-AM/2012

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Journal of Materials Research

Volume

35

Issue

13

Pages

1623 - 1634

Publisher

Cambridge University Press (CUP)

Version

AM (Accepted Manuscript)

Rights holder

© Materials Research Society 2020

Publisher statement

This article has been published in a revised form in Journal of Materials Research https://doi.org/10.1557/jmr.2020.45. This version is published under a Creative Commons CC-BY-NC-ND. No commercial re-distribution or re-use allowed. Derivative works cannot be distributed. © copyright holder.

Acceptance date

06/02/2020

Publication date

2020-03-12

Copyright date

2020

ISSN

0884-2914

eISSN

2044-5326

Language

en

Depositor

Prof Vadim Silberschmidt . Deposit date: 16 November 2020