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

Richard J. Seymour | Zendy; Anne Hémeryck | Zendy; Ken-ichi Nomura | Zendy; Weiqiang Wang | Zendy; Rajiv K. Kalia | Zendy; Aiichiro Nakano | Zendy; Priya Vashishta | Zendy

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

Author(s) -

Richard J. Seymour,

Anne Hémeryck,

Ken-ichi Nomura,

Weiqiang Wang,

Rajiv K. Kalia,

Aiichiro Nakano,

Priya Vashishta

Publication year - 2014

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4867168

Subject(s) - nial , nanoindentation , indentation , materials science , dislocation , molecular dynamics , crystallography , deformation (meteorology) , displacement (psychology) , crystal (programming language) , composite material , intermetallic , chemistry , computational chemistry , psychology , alloy , computer science , psychotherapist , programming language

International audienceMolecular 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

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