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Atomistic calculation of elastic constants of alpha-iron containing point defects by means of magnetic interatomic potentials

“…Such softening as a function of neutron irradiation has also been seen in the 1 0 0, 1 1 0 and 1 1 1 Young's moduli of tungsten and molybdenum [10]. Early work on the lattice theory of interstitial and vacancy point defects [11,12] revealed that the vibrational spectrum of point defects may be characterized by low frequency resonance modes whose effect persists to the long wave length limit through a renormalization of the sound velocity. Indeed the data of Fig.…”

The effects of neutron irradiation on the physicomechanical properties of refractory metals

“…In the metals with the BCC lattice, the elastic moduli decrease in all crystallographic directions; in the metals with the HCP lattice, they increase. The smallest changes in the elastic moduli are observed in tungsten (Zakharova et al 2001). In molybdenum and niobium, the maximum changes in the shear modulus are manifested for the <100> orientation.…”

“…As can be seen in the figure, the level of changes in the electrical resistance caused by irradiation is maintained up to 600 °C, then, there is an increase up to 0.7Т m . There is no complete electrical resistance recovery to be observed in this temperature range, and this can also be associated with the accumulation of transhumant's (chromium, titanium) (Zakharova et al 2001). The changes under irradiation and the recovery during annealing of the electrical resistance specific for the metals of Groups V and VI are due to different solubilities of interstitial impurities in the lattices of these metals.…”