|About this Abstract
||Materials Science & Technology 2019
||Joining of Advanced and Specialty Materials XXI
||Study of Variation in Mechanical Properties from Welding Low Density Fe-Mn-Al-C Steel for Armor Applications
||Rishi Kant, John DuPont
|On-Site Speaker (Planned)
Austenitic Fe-Mn-Al-C alloys are a promising substitute for the currently used low alloy steels for armor plate applications due to its light weight, superior strength, and comparable toughness. The addition of elements like Al and C lowered the density of the alloy while forming kappa carbides for higher strength. Welding precipitation strengthened alloys can form locally hardened/softened regions in the heat affected zone (HAZ) due to growth, dissolution and/or coarsening of precipitates. Gleeble based single and multipass weld study was conducted to review the variation in mechanical properties across the HAZ. Results from the Gleeble study were correlated with the autogenous GTA welds fabricated with similar heat inputs. Feasibility study on using multipass thermal cycles to potentially eliminate post weld heat treatment will also be discussed. Detailed microstructural characterization was done to gain a fundamental understanding of the mechanism of the observed trends in both HAZ and the fusion zone.