NiAl an ordered intermetallic has low density,good oxidation resistance and
excellent stability.however the alck of tensile ductility in both single and
polycrystalline NiAl at lower temperatures has beena major obstacle in its
application as a structured material. To overcome this low temperature
brittleness while retaining the high temperature properties the crack tip
response under loading has to be studied.
Hence we have the atomisitic simulations of the crack tip configuration in B_{2}
NiAl.These simualations were carried out using molecular statics and EAM
potentials.The cracks are stabilized near a Griffith condition and the process
of the tip region.
The crack tip slip plane geometries considered are for :
