|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Influence of PWHT on Impact Toughness of Electron Beam Welded AISI 409 Stainless Steel
||Akash Doomra, Sandeep Sandhu, Beant Singh
|On-Site Speaker (Planned)
Ferritic stainless steel are considered as an alternative to SS and CS as it possess desirable mechanical properties at low price however it has poor weld ability. Ferritic steels suffer from fall in mechanical properties due to high grain growth in the HAZ during welding. In this piece of research 409 ferritic steel plates of 18mm thickness are welded with single pass electron beam welding. The joint was subjected to metallurgical examination in as welded condition and after PWHT at 500°C for 75 minutes (furnace cooled). Due to rapid solidification, ferrite grains in the HAZ changed the morphology from equiaxed to columnar. The charpy impact test was done at both at room temperature and cryogenic temperature (-40°C). The material showed nearly equal to zero impact toughness at -40°C in both as welded and after PWHT. It possessed acceptable toughness of 28 J when tested at room temperature.