PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

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Procedia Structural Integrity 23 (2019) 299–304

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. The applicability of high entropy alloys (HEAs) as useful structural co ponents is limit d due to our lack of syste atic unders anding of the role of micro- nd sub-structural features on their def rmation and fracture behaviour. Synerg stic assessment of fracture toughness (FT) and activation volume (V) for plastic deformation of typical BCC and FCC HEAs containing Al-Cr-C Cu-Fe-Ni by standard practices have be n made to th w some light in th s dir ction; these assessm s are supplemented by micro and sub-struct ral examinations using electron m croscopy together with measurements of conventional m chanical properties e major results indicat that the BCC alloy exhibits higher hardness and strength w th inf ior FT compar d o the FCC ll y. This ob ervation has been xplain d us ng the e t mat d magnitudes of V which is gover ed by the operative deformation mechanisms controlled by the nature of dislocations in the concerned microstructural constituents. © 201 9 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture The Role of Substructural Features on the Deformation and Fracture Behavior of BCC and FCC High Entropy Alloys Ayan Ray a , Ushasi Roy b , Mamta Kumari c , Kalyan Kumar Ray d * a Valeo Autoklimatizace k.s.Sazečská 247/2; 108 00; Prague; Czech Republic b School of Mechanical Engineering, Georgia Inst. of Technology, Atlanta, GA-30332-0405, USA c Cummins India Ltd, Pune-411045, Maharashtra India d Dept. Metallurgical and Materials Engg., Indian Institute of Technology Kharagpur-721302, India, Currently with Indian Institute of Engineering Science and Technology, Shibpur-711103, India The applicability of high entropy alloys (HEAs) as useful structural components is limited due to our lack of systematic understanding of the role of micro- and sub-structural features on their deformation and fracture behaviour. Synergistic assessment of fracture toughness (FT) and activation volume (V) for plastic deformation of typical BCC and FCC HEAs containing Al-Cr-Co Cu-Fe-Ni by standard practices have been made to throw some light in this direction; these assessments are supplemented by micro- and sub-structural examinations using electron microscopy together with measurements of conventional mechanical properties. The major results indicate that the BCC alloy exhibits higher hardness and strength with inferior FT compared to the FCC alloy. This observation has been explained using the estimated magnitudes of V which is governed by the operative deformation mechanisms controlled by the nature of dislocations in the concerned microstructural constituents. 9th International Conference on Materials Structure and Micromechanics of Fracture The Role of Substructural Features on the Deformation and Fracture Behavior of BCC and FCC High Entropy Alloys Ayan Ray a , Ushasi Roy b , Mamta Kumari c , Kalyan Kumar Ray d * a Valeo Autoklimatizace k.s.Sazečská 247/2; 108 00; Prague; Czech Republic b School of Mechanical Engineeri g, Georgia Inst. of Technology, Atl nta, GA-30332-0405, USA c Cummins d a Ltd, Pune-411045, Maharashtra India d Dept. Metallurgical and Materials g., Indian Institute of e l Kharagpur-721 02, India, Currently with Indian Institute of Engineering Science and Technology, Shibpur-711103, India Abstract Abstract

Keywords: High entropy alloy, Fracture toughness, Deformation mechanism, Substructure Keywords: High entropy alloy, Fracture toughness, Deformation mechanism, Substructure

* Corresponding author. Tel.:+ 91 9434230710 E-mail address: kalyankumarry@gmail.com * Correspon ing author. Tel.:+ 91 9434230710 E-mail address: kalyankumarry@gmail.com

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.103