Effect of Process Parameters and Metallographic Studies of ASS-304 Stainless Steel at Various Temperatures under Warm Deep Drawing

AbstractWarm forming of high strength sheet metal alloys are in great demand and its application has importance in defense and nuclear industries. In the present investigation the austenitic stainless steel (ASS)-304 blanks are deep drawn under warm conditions using 20Ton hydraulic press and observed that at lower punch speed when the cup is drawn at elevated temperatures the formability is improved. Numbers of deep draw experiments are conducted under warm conditions to study the microstructure at elevated temperatures for punch corner region cups at variable speeds. In this investigation, changes in the microstructure are observed for deep drawn cups at ambient and elevated temperatures

Comparative study of Dual-Phase -590 steel on formability at superplastic region and room temperature

A steel alloy DP590 is commonly used for automobile applications because of its outstanding mechanical characteristics. One crucial limitation of this steel forming is that it has limited malleability and ductility. In this study, we compared the experimental forming limit diagram (FLD) for DP590 at RT and 800°C using stretching. An experiment with a strain rate of 0.01/s is carried out with samples cut in four different directions (0°,30°,60°& 90°) as seen from the rolling direction. Rolling direction specimens have been found to be among the stronger samples. FLD can be applied as a method for studying temperature differences in formability characteristics of DP590. Scanning electron microscopy was used for the analysis deformation pattern. Based on these results, it shows that the material has become significantly more formable