This investigation aims to explore determinants of exposure to particle size-specific welding fume. Area sampling of ultrafine particles (UFP) was performed at 33 worksites in parallel with the collection of respirable particles. Personal sampling of respirable and inhalable particles was carried out in the breathing zone of 241 welders. Median mass concentrations were 2.48 mg m(-3) for inhalab...

Abstract Inconel 690 has been extensively used in steam generator tubing materials for pressurized water reactors. In order to improve the weld quality of 690, ultrasonic-assisted pulsed tungsten inert gas (TIG) welding is studied. this study, macrostructure, microstructure, and mechanical properties weldments welded by TIG with without ultrasonic assistance were investigated. The microstructur...

Abstract Activated tungsten inert gas (A-TIG) welding is one variant of conventional TIG where a thin layer suitable activating flux deposited on the parent components prior to constituting arc in order harness enhanced penetration. Despite several benefits, industries are still reluctant overwhelmingly using this new variant. This article attempts highlight productivity benefits employing A-TI...

Austenitic stainless steel SS304 grade was welded with active Tungsten Inert Gas (TIG) welding process by applying a flux paste made of SiO2 powder and acetone. SiO2 flux application improves the weld bead depth with a simultaneous reduction in weld bead width. The improvement in penetration results from arc constriction and reversal of Marangoni convection. Experimental studies revealed that t...

بررسی رابطه‌ی بین گروه‌های غذایی و دریافت درشت مغذی‌ها ریزمغذی‌ها با افزایش ریسک PCOS در زنان 20-40 ساله مراجعه‌کننده به بیمارستان صارم شهر تهران