|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Simulated Welding Heat Affected Zone of a SAF2507 Super-duplex Stainless Steel by Gleeble Simulator
||Lilia Olaya-Luengas, Juan A. Pozo-Morejón, Ivani S. de Bott
|On-Site Speaker (Planned)
Microstructural and mechanical characterization were performed on physically simulated welding heat-affected zone (HAZ) samples of a commercial super-duplex stainless steel.
During the physical simulation, several rapid cooling rates were applied from 1400 to 500°C to create a simulated HAZ, which corresponded to weld heat inputs from 1.5 to 3.5 kJ/mm using a Gleeble simulator. The thermal cycle from ferritization temperature to 1200°C permitted to study the grain growth of ferritic matrix. The formation and precipitation of austenite were considered from 1200 to 800°C, typical temperature range for duplex stainless steels. The formation of intermetallic phases was evaluated from 800 to 500°C.
The effects of weld heat inputs on phase transformations, intermetallic phase’s formation and mechanical behaviour during welding simulation at high temperature were studied. Welding conditions of must be controlled such that cooling rate is slow enough to promote austenite and fast enough to prevent intermetallic phases.
||Planned: A print-only volume