Prediction of Freckle Defects in INCONEL718 VAR Ingots.

prediction of ignition delay period in d.i diesel engines

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

the role of type-d personality, social support and self-compassion in prediction of health behaviors in coronary heart disease patients

نظر به اهمیت و تاثیر روزافزون عوامل روانی – اجتماعی در سلامت جسمی و تاثیر عوامل روان شناختی در بروز بیماریهای مختلف از جمله بیماریهای قلبی و عروقی این پژوهش با هدف کلی بررسی ارتباط تیپ شخصیتی d ، حمایت اجتماعی و خود دلسوزی در پیش بینی رفتارهای بهداشتی بیماران کرونر قلبی و تعیین تفاوت بین بیماران کرونر قلبی با و بدون جراحی و افراد سالم در این متغیرها و رفتارهای بهداشتی آنان، انجام گرفت. جامعه آ...

High Temperature Fatigue Crack Propagation in INCONEL718

Preparation of ingots of uranium-niobium alloy

A study was made of the preparation of a uranium 10 w/o niobium alloy by the bomb reduction of a suitable form of niobium and uranium tetrafluoride with calcium. A compound with a probable formula of Na2NbOF5 proved to be most satisfactory as the source of niobium. High yields and good metal-slag separations were obtained. Chemical analysis and density determinations showed the composition to b...

Freckle Defect Formation near the Casting Interfaces of Directionally Solidified Superalloys

Freckle defects usually appear on the surface of castings and industrial ingots during the directional solidification process and most of them are located near the interface between the shell mold and superalloys. Ceramic cores create more interfaces in the directionally solidified (DS) and single crystal (SX) hollow turbine blades. In order to investigate the location of freckle occurrence in ...