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.

Domaines

Cristallographie Matériaux Chimie théorique et/ou physique Modélisation et simulation Matière Condensée [cond-mat]

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Seymour_APL104_2014.pdf (2.23 Mo)

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

Soumis le : lundi 27 mars 2017-16:33:35

Dernière modification le : lundi 20 novembre 2023-11:44:23

Archivage à long terme le : mercredi 28 juin 2017-15:28:08

Dates et versions

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

Identifiants

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

Citer

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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