Eur. Phys. J. B 82, 133-141 (2011)
https://doi.org/10.1140/epjb/e2011-20135-9

Molecular dynamics simulations of Ni/NiAl interfaces

¹ Institut für Materialprüfung, Werkstoffkunde und Festigkeitslehre, Universität Stuttgart, Pfaffenwaldring 32, 70569 Stuttgart, Germany
² Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, 600036 Chennai, India

Corresponding author: ^a stephen.hocker@imwf.uni-stuttgart.de

Received: 23 February 2011
Revised: 22 June 2011
Published online: 5 August 2011

Abstract

Molecular dynamics simulations are used to study brittle/ductile interfaces Ni/B2-NiAl under mechanical loading. Uniaxial tensile tests perpendicular to the interface are performed. It is shown that interfaces have influence on strain induced material failure by nucleation of defects. Crack propagation in the interface is investigated by applying load via fixed displacement boundary conditions. Determined crack velocities in the interface are found to be clearly above those in each of the materials.