|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Additive Manufacturing for Energy Applications IV
|Compositionally Graded Joint of 316L Stainless Steel to A508 Low Alloy Steel by Additive Manufacturing
|Xiaoyuan Lou, Josh Le, Houshang Yin, Jingfan Yang
|On-Site Speaker (Planned)
Most energy applications require dissimilar metal joining, done by welding, to manufacture components that can simultaneously serve different purposes while minimizing the material cost. One common example is the transition joint from austenitic stainless steel to ferritic steel. This study reports the design strategy, microstructure, and material properties of the compositionally graded joint of 316L stainless steel (SS) to A508 low alloy steel fabricated by laser direct energy deposition additive manufacturing (AM). Heat treatment, such as solution annealing, normalization, and tempering, is necessary to acquire adequate strength and toughness for A508 steel. Microstructural evolution of 316L SS, A508 steel, and transition region by heat treatment will be discussed. While heat treatment promotes recrystallization and phase transformation, the complex heat treatment cycle leads to elemental diffusion between alloys, grain coarsening, and intermetallic phase formation, and sensitization. A careful design of transition strategy minimizes the detrimental impacts from these metallurgical processes.
|Additive Manufacturing, Nuclear Materials, Iron and Steel