Model of Combined Hardening of Crystalline Materials by Coherent and Incoherent Precipitates in Application to Irradiated Iron-Based Alloys with BCC Structure

Friedel statistics are used to develop a scheme for calculating the force required to detach an edge dislocation from obstacles of different strength which pin it. A mechanism is proposed for hardening crystalline materials by using coherent precipitates. The scheme is based on the difference of the equilibrium structures of the matrix and precipitate. The Russell-Brown model of dispersion hardening of aging alloys is used to formulate a new criterion for determining the maximum force of interaction between a dislocation with a precipitate which it cuts through. The increase in the yield strength of certain irradiated iron-based model alloys with bcc structure as a result of the hardening of the alloys by coherent copper-nickel-manganese precipitates and micropores separately and in combination is calculated.__________Translated from Atomnaya Energiya, Vol. 98, No. 5, pp. 332–341, May 2005.     

Effect of plastic working on the structural stability of composite (nickel-chromium alloy)-tungsten materials

Conclusions The character of diffusional interaction of the components of tungsten-reinforced heat-resisting sheet composite materials produced by hot forging with subsequent plastic working depends on the latter's degree of plastic deformation. The loss of chromium from the surface of such a CM varies depending on the degree of plastic deformation and on the composition of the matrix alloy. Tungsten fibers stabilize the composition of a CM by acting as obstacles in the paths of chromium diffusion fluxes.Translated from Poroshkovaya Metallurgiya, No. 3(255), pp. 40–44, March, 1984.