Nanoindentation of NiAl and Ni3Al crystals on (100), (110), and (111) surfaces: A molecular dynamics study

Molecular dynamics simulations were performed to study the nanoindentation of NiAl and Ni3Al crystals on three surfaces: (100), (110), and (111). The calculated load-displacement curves show discrete drops at certain indentation depths, indicating dislocation bursts during indentation. The hardness values for the two materials were found to depend significantly on the indented crystallographic plane: the (100) surface is the softest for NiAl and the hardest for Ni3Al. We also found distinctive deformation activities in the subsurface region in Ni3Al crystals, while dislocation loops propagate deep into the substrate in NiAl systems.

Domains

Cristallography Material chemistry Theoretical and/or physical chemistry Modeling and Simulation Condensed Matter [cond-mat]

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Seymour_APL104_2014.pdf (2.23 Mo)

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https://hal.laas.fr/hal-01496618

Submitted on : Monday, March 27, 2017-4:33:35 PM

Last modification on : Monday, April 17, 2023-6:32:11 PM

Long-term archiving on: Wednesday, June 28, 2017-3:28:08 PM

Dates and versions

hal-01496618 , version 1 (27-03-2017)

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HAL Id : hal-01496618 , version 1
DOI : 10.1063/1.4867168

Cite

Richard Seymour, Anne Hémeryck, Ken-Ichi K Nomura, Weiqiang Wang, Rajiv K Kalia, et al.. Nanoindentation of NiAl and Ni3Al crystals on (100), (110), and (111) surfaces: A molecular dynamics study. Applied Physics Letters, 2014, 104 (14), pp.141904 - 84907. ⟨10.1063/1.4867168⟩. ⟨hal-01496618⟩

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