Atomic Energy of Canada Limited

About: Atomic Energy of Canada Limited is a company organization based out in Ottawa, Ontario, Canada. It is known for research contribution in the topics: Neutron & Zirconium alloy. The organization has 4845 authors who have published 4826 publications receiving 102951 citations.

The Probability and Timing of Power System Restoration

Abstract: Power restoration following a large outage or widespread blackout is time critical and complex. A new method is presented for determining the timing and chance of electric power recovery and restoration. The present advance over previous work is explicitly integrating human, component and system reliability, which unifies the topic of power system restoration with the general theory for errors, accidents and outcomes for other technological systems.

On the development of microstructures and residual stresses during laser cladding and post-heat treatments

Abstract: In this article, laser cladding process with a blown powder feeding was used to deposit nickel-based IN-625 superalloy, cobalt-based hardfacing Stellite 6 alloy and high-vanadium CPM 10V tool steel onto a similar or dissimilar base material, respectively, to investigate the development and controllability of process-induced residual stresses in the clad and to analyse their correlation with microstructural evolutions of the clad and heat-affected zone (HAZ) during cladding and post-heat treatments. The residual stresses were evaluated using the hole-drilling method as per ASTM E837-95, whereas the microstructures were studied using X-ray diffractometer, optical microscope and scanning electron microscope. A particular attention was paid to combined effect of both clad and HAZ on the build-up of residual stresses in the clad. It is expected that the experimental results will form a useful addition to the existing knowledge with respect to the topic and, more significantly, to promote confidence on industrial applications of laser-clad IN-625, Stellite 6 and CPM 10V materials.

Microstructural and processing factors influencing the formation of annealing twins

Abstract: Quantitative understanding of the process and thermodynamic parameters involved in the formation of annealing twins after plastic straining, is important in being able to control the manufacturing process of twin generation on a commercial scale. In the present paper modifications are made to the only two existing publications in the literature that treat twin formation in a quantitative manner. Both the equations of Pande et al. and an earlier one by Gleiter, are modified to account for strain and then compared with results from the literature and data generated by the present authors on commercially pure nickel. Good agreement is made between the theoretical predictions of the two models suitably modified for strain values from 3.0 to 7.5%. It was also noted that there is a synergistic effect of strain and temperature in influencing the density of annealing twins. Optimization of both parameters results in the density of annealing twins in commercially pure nickel reaching a value of 2.3 × 10 4 m −1 .