the aim of this research was to study the wear behavior of 42crmo4 steel/zro2 composite with 10 and 30 ppi performed ceramic and compare it with the un-reinforced steel under different applied loads. the composite specimens were obtained by pressureless infiltration of the melt into a preformed ceramic of zirconium oxide. the effect of applied load on the specimens wear behavior was studied by ...

Mechanical stress-strain hysteresis, temperature and electrical resistance measurements were performed for the detailed characterisation of the fatigue behaviour of the quenched and tempered steel SAE 4140 (42CrMo4) under constant amplitude loading and service loading. On the basis of generalised Morrow and Basquin equations the fatigue life calculation method “PHYBAL” was developed. Short cons...

در صنعت پالایشگاه و پتروشیمی‌ها به دلیل وجود تجهیزات تمام فلزی محیط اسیدی خوردگیتنشی زیاد است با توجه افزایش کاربرد فولادهای زنگ نزن این صنایع پژوهش بررسی اثر ضربات امواج اولتراسونیک بر رفتار خوردگی فولاد 316 (S.S 316) می‌پردازیم. هدف از تأثیر روش تنش‌زدایی برافزایش مقاومت قطعات محیط‌های خورنده است. لازم ذکر که، تنش پسمان نمونه‌ها جوش‌کاری ایجادشده ابتدا نمونه مدنظر استفاده ارتعاش تحت فرکانس 20...

The oxidation mechanism of metals depends, among other factors, on the surface integrity. and rim zone properties are often determined by manufacturing process that was used to machine material. Laser chemical machining (LCM) is a uses laser radiation as localized selective heat source activate reaction between an electrolyte metallic surface. objective this work first investigate how different...

Este trabajo describe el procedimiento seguido para modelar electromagnética y térmicamente una carga de templado por inducción compuesta acero 42CrMo4, lo que deben considerarse la dependencia con nivel campo magnético temperatura las propiedades físicas del material. Los resultados obtenidos mediante simulación numérica muestran existencia un comportamiento crítico entorno a Curie. Finalmente...