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...

Friction stir welding (FSW) is a solid-state joining method that suitable for dissimilar materials such as aluminum and steel due to its comparatively low process temperatures. Such hybrid joints are of great interest in view lightweight construction efforts various industrial sectors transportation. As the combination different metals structures may cause corrosion problems area because format...

Abstract Background Many metals exhibit a stress overshoot, the so-called cross-hardening when subjected to specific strain-path change. Existing tests for sheet are limited an equivalent prestrain of 0.2 and show varying levels identical grades. Objective The aim is determine at large strains, relevant forming processes. Mild steel grades (DC04, DC06, DX56) high strength (BS600, DP600, ZE800) ...

In the study, effects of welding parameters on microstructure and mechanical properties electrical resistance spot welded TBF/DP600 steel sheets 1.2 mm thickness were investigated. TBF used in study was both with without electro-galvanized. Microhardness measurements tensile shear tests taken as basis determining properties, while optical microscope for microstructural characterization. The nug...