Study of Cryogenic Rolling of FCC Metals with Different Stacking Fault Energies

Calculated stacking-fault energies of elemental metals.

Š110‹ symmetric tilt grain-boundary structures in fcc metals with low stacking-fault energies

Twenty-one ^110& symmetric tilt grain boundaries ~GB’s! are investigated with atomistic simulations, using an embedded-atom method ~EAM! potential for a low stacking-fault energy fcc metal. Lattice statics simulations with a large number of initial configurations are used to identify both the equilibrium and metastable structures at 0 K. The level of difficulty in finding the equilibrium struct...

Stacking - fault energies in simple metals : applications to BCC metals

We present a general method for calculating the stacking-fault energy in simple metals, and then we apply this to the ( 1 1 2 ) faults in body-centred cubic (BCC) metals. Our method contains no approximations for a given wavenumber characteristic (or equivalently the pair potential). Our results show that metastable faults do indeed exist in the simple BCC metals (Li, Na. K, Rb, Cs, Ca. Sr, Ba)...

Continuum understanding of twin formation near grain boundaries of FCC metals with low stacking fault energy

Deformation twinning from grain boundaries is often observed in face-centered cubic metals with low stacking fault energy. One of the possible factors that contribute to twinning origination from grain boundaries is the intergranular interactions during deformation. Nonetheless, the influence of mechanical interaction among grains on twin evolution has not been fully understood. In spite of ext...

Effect of stacking fault energy on mechanism of plastic deformation in nanotwinned FCC metals

Starting from a semi-empirical potential designed for Cu, we have developed a series of potentials that provide essentially constant values of all significant (calculated) materials properties except for the intrinsic stacking fault energy, which varies over a range that encompasses the lowest and highest values observed in nature. These potentials were employed in molecular dynamics (MD) simul...