Nanoindentation of NiAl and Ni<inf>3</inf>Al crystals on (100), (110), and (111) surfaces: A molecular dynamics study

Richard Seymour; Anne Hemeryck; Ken Ichi Nomura; Weiqiang Wang; Rajiv K. Kalia; Aiichiro Nakano; Priya Vashishta

doi:10.1063/1.4867168

Nanoindentation of NiAl and Ni<inf>3</inf>Al crystals on (100), (110), and (111) surfaces: A molecular dynamics study

Richard Seymour
, Anne Hemeryck
, Ken Ichi Nomura
, Weiqiang Wang
, Rajiv K. Kalia
, Aiichiro Nakano
, Priya Vashishta

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

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. © 2014 Author(s).

Original language	English
Journal	Applied Physics Letters
Volume	104
Issue number	14
DOIs	https://doi.org/10.1063/1.4867168
State	Published - Apr 7 2014
Externally published	Yes

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

abstract = "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. {\textcopyright} 2014 Author(s).",

author = "Richard Seymour and Anne Hemeryck and Nomura, \{Ken Ichi\} and Weiqiang Wang and Kalia, \{Rajiv K.\} and Aiichiro Nakano and Priya Vashishta",

year = "2014",

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doi = "10.1063/1.4867168",

language = "English",

volume = "104",

journal = "Applied Physics Letters",

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T1 - Nanoindentation of NiAl and Ni3Al crystals on (100), (110), and (111) surfaces: A molecular dynamics study

AU - Seymour, Richard

AU - Hemeryck, Anne

AU - Nomura, Ken Ichi

AU - Wang, Weiqiang

AU - Kalia, Rajiv K.

AU - Nakano, Aiichiro

AU - Vashishta, Priya

PY - 2014/4/7

Y1 - 2014/4/7

N2 - 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. © 2014 Author(s).

AB - 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. © 2014 Author(s).

UR - https://www.scopus.com/pages/publications/84898942584

U2 - 10.1063/1.4867168

DO - 10.1063/1.4867168

M3 - Article

SN - 0003-6951

VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 14

ER -

Nanoindentation of NiAl and Ni<inf>3</inf>Al crystals on (100), (110), and (111) surfaces: A molecular dynamics study

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