Influence of the hole in the blank on the quality and precision of the hole obtained by broaching

The dependence of the final macrogeometry and microgeometry of the machined hole surface on the surface quality of the blank in broaching is investigated by simulation.     

Self-consisted calculation of the magnetic field for problems of magnetic flaw detection. I. Initial model for calculating the field of a magnetic tape magnetized from a wire with a current

The ability to calculate the field of a set of arbitrarily charged and arbitrarily arranged rectangular areas was considered. The result was verified by calculating the recorded field on a magnetic tape.     

Calculation of Elastic Energy Release during Crack Development

A numerical method is developed for solving three-dimensional problem on the stress state around an arbitrary crack in the infinite medium.     

Influence of carbon on the formation of structure during mechanical alloying and sintering of powder steels

The structure and properties of steels produced from powders in a thermodynamically nonequilibrium state with an increased dislocation density, cellular substructure, and ground subgrains are studied. A non-equilibrium state of powders was reached using mechanical alloying of iron with carbon. Sintered steels inherited the powder structure, and the physicomechanical properties increased with increasing amount of added mechanical energy and carbon content. The strengthening mechanism is associated with the formation of a cellular dislocation structure in iron in its mechanical alloying with carbon.     

Use of the photoelasticity method for prediction of failure of rotating parts containing metallurgical defects

Bryansk. Leningrad. Translated from Problemy Prochnosti, No. 5, pp. 113–115, May, 1989.     

Blue-shift in photoluminescence of ion-milled HgCdTe films and relaxation of defects induced by the milling

Simultaneous measurements of electrical conductivity, the Hall coefficient, and photoluminescence (PL) spectra of ion-milled Hg_1 − xCd_xTe films (x ∼ 0.30 and 0.38) were performed during post-milling ageing of the films at 293 K. In the course of the PL study, a ‘relaxation’ of the blue-shift of the PL band of ion-milled Hg_0.70Cd_0.30Te was observed. The relaxation was caused by the decrease of the electron concentration due to gradual disintegration of defects induced by the milling. It is shown that while ion milling substantially changes the electrical properties of Hg_1 - xCd_xTe, its PL spectrum in the long-term is affected insignificantly.