A New Approach for Improving the Ductility of Austenitic Stainless Steel by Austempering and Alloying with Aluminum

Ahmed I. Z. Farahat

《International Journal of Material and Mechanical Engineering》 2卷4期 (2013/11) Pp. 74-79

並列摘要

Austenitic stainless steel (ASS) has been widely used in different applications. The industrial demand for stainless steels with improved resistance to oxidation at high temperature was the main driving force for adding aluminum as an alloying element to austenitic stainless steel. However, the addition of aluminum increases the work-hardening property and deteriorates the ductility of stainless steel. This paper addresses a new approach to overcome the deterioration of ductility by alloying (ASS) with 4wt% Al using vacuum induction furnace. Hot forging has been performed at 1000°C with a reduction ratio of 90% in cross-sectional area. X‐ray diffraction was used to determine the different phases formed due to hot forging. Results showed that alloying with Al decreases the austenite phase and increases the ferrite phase in (ASS), therefore, austempering process was carried out at different temperatures to increase the austenite phase and consequently to enhance ductility. Compression and hardness tests were performed at room temperature to determine the effect of Al alloying, phase formation, and tempering temperatures on the strength and ductility of (ASS).

並列關鍵字

Al alloying ； Hot Forging ； Austenite Phase ； Compression Strength