Activation Volume and Energy for Dislocation Nucleation in Multi-Principal Element Alloys

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Paper describes study evaluating incipient plasticity in multi-principal element alloys, CoCrNi, CoCrFeMnNi, and Al0.1CoCrFeNi by nano-indentation and compared with pure Ni.

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Mridha, Sanghita; Sadeghilaridjani, Maryam & Mukherjee, Sundeep February 23, 2019.

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This article is part of the collection entitled: UNT Scholarly Works and was provided by the UNT College of Engineering to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 86 times. More information about this article can be viewed below.

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Paper describes study evaluating incipient plasticity in multi-principal element alloys, CoCrNi, CoCrFeMnNi, and Al0.1CoCrFeNi by nano-indentation and compared with pure Ni.

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10 p.

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Abstract: Incipient plasticity in multi-principal element alloys, CoCrNi, CoCrFeMnNi, and Al0.1CoCrFeNi was evaluated by nano-indentation and compared with pure Ni. The tests were performed at a loading rate of 70 μN/s in the temperature range of 298 K to 473 K. The activation energy and activation volume were determined using a statistical approach of analyzing the “pop-in” load marking incipient plasticity. The CoCrFeMnNi and Al0.1CoCrFeNi multi-principal element alloys showed two times higher activation volume and energy compared to CoCrNi and pure Ni, suggesting complex cooperative motion of atoms for deformation in the five component systems. The small calculated values of activation energy and activation volume indicate heterogeneous dislocation nucleation at point defects like vacancy and hot-spot.

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  • Metals, 9(2), MDPI, February 23, 2019, pp. 1-10

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  • Publication Title: Metals
  • Volume: 9
  • Issue: 2
  • Peer Reviewed: Yes

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  • February 23, 2019

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  • May 11, 2020, 3:41 p.m.

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  • Dec. 12, 2023, 2:14 p.m.

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Mridha, Sanghita; Sadeghilaridjani, Maryam & Mukherjee, Sundeep. Activation Volume and Energy for Dislocation Nucleation in Multi-Principal Element Alloys, article, February 23, 2019; [Basel, Switzerland]. (https://digital.library.unt.edu/ark:/67531/metadc1638168/: accessed May 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Engineering.

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