|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Investigation of Impact Toughness of Electron Beam Welded AISI 321 SS at Cryogenic Temperatures
||Sandeep Sandhu, Ajay Sharma, Vineet Prabhakar
|On-Site Speaker (Planned)
In this piece of research work, 18mm thick austenitic stainless steel AISI 321 was welded with Electron Beam Welding, to investigate the effect of welding parameters on the impact strength. Addition of Titanium in AISI 321, makes it resistant to intergranular corrosion at high temperature of 850°C approximately, thus it is used in exhaust of jet engines. In this paper single pass, square butt joint is fabricated using autogenous EBW at voltage 150 kV, current 90 mA and welding speed 600 mm/min. The metallographic studies were conducted using SEM and optical microscope. The microhardness and impact strength were investigated in as welded condition and after thermally ageing it at 750°C for 24 hours. The average impact toughness conducted using chary impact test at cryogenic temperature i.e. -40°C in as welded samples was recorded as 274J and it got reduced to 252 J after aging treatment of 750°C for 24 hours.