Nature of the Accident Tin is manufactured on a very large scale in Bootle. It occurs naturally as pyrites, and arsenic is an invariable contaminant. The chemical composition of the ores varies considerably but arsenic is present in a concentration of up to 3 %. The tin is liberated from its ores by heating with carbon. The arsenical impurities float to the surface of the molten tin and form a ...

Abstract In the present study, effect of cone angle tool pin on mechanical properties and microhardness aluminum alloy AA6061-T6 specimens is investigated for three processes SFSW, symmetric DFSW, asymmetric DFSW. each mentioned welding processes, tools with 5 different conical angles 0, 5, 10, 15, 20° are used. these final welded joint have been enhanced noticeably compared to simple cylindric...