While the mechanical properties of stoichiometric B2 β-phase NiAl are well established, effect off-stoichiometric composition on fracture behavior has not yet been systematically studied over entire range 40-55% Al. Here we use microbending tests notched cantilever beams FIB-milled from single crystals with an aluminized as oxidation-induced gradient to determine influence Al concentration toug...

We study the electronic and transport properties of artificial Au atomic chains on a NiAl(110) surface template using state-of-the-art first principles calculations. Au chains display remarkable one-dimensional electronic properties that can be tuned by the selective adsorption of small molecules: a single CO group is shown to modulate the electronic wave functions, acting as a "chemical scisso...

Resistance spot welding (RSW) is widely used as a main joining technique in industry and the electrode caps are frequently replaced because of degradation during service. In this study, G type copper RSW were coated with Fe Ni based Fe3Al, FeAl, Ni3Al, NiAl alloys by Electro-Spark Deposition (ESD), providing resistance to hot deformation, oxidation Zn evaporation from sheet metal. The ESD teste...

L. Yang, X.-L. Wang,* C.T. Liu, J.A. Fernandez-Baca, C.L. Fu, J.W. Richardson and D. Shi Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0012, USA Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA Intense Pulsed Neutron Source, Argonne Nationa...

A first-principles approach to calculating the elastic stiffness coefficients at finite temperatures was proposed. It is based on the assumption that the temperature dependence of elastic stiffness coefficients mainly results from volume change as a function of temperature; it combines the first-principles calculations of elastic constants at 0 K and the first-principles phonon theory of therma...