SM Hussaini
BITS-Pilani, Hyderabad
India
Title: Investigation of ass 316 formability at elevated temperature
Biography
Biography: SM Hussaini
Abstract
Sheet metal forming of high strength materials at elevated temperature is one of the important processes in industries. The present work is aimed to study the formability of austenitic stainless steel (ASS) 316 at elevated temperatures. Dynamic strain aging (DSA) region was observed for ASS 316 in the temperature range of 400 to 600°C, so the investigation is limited to bellow this temperature. Limiting drawing ratio and thickness of the drawn cup are the indicators of formability in deep drawing. In the present investigation circular blanks are deep drawn at room temperature, 150 ◦C and 300 ◦C using a 20 ton hydraulic press coupled with a furnace. Finite element simulations have carried out using Dyna form with LS-Dyna solver. Simulations and experimental results show an increase in the limiting drawing ration as the temperature increases and a decrease in the thickness of the drawn cup without any fracture. An artificial neural network model has developed for the prediction of the cup thickness at different locations. The comparison between these sets of results indicates the reliability of the predictions. It was found that there is a good agreement between the experimental and predicted values.