|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||Progressive Amplitude Fatigue Performance of Additively Manufactured Stainless Steel Superalloy
||Sanna Siddiqui, Krystal Rivera, Isha Ruiz-Candelario, Ali P Gordon
|On-Site Speaker (Planned)
Advances in aerospace component manufacturing design are being achieved through the additive manufacturing (AM) technology. Variations in cyclic loads (i.e., variable amplitude fatigue) is a common phenomenon experienced by aerospace components during in-service use, hence the need for AM components to withstand fatigue failure under these conditions. This study has performed progressive strain amplitude fatigue tests at increasing strain ranges with the intent to capture the cyclic stress-strain curve, fatigue failure life, hardening/softening response, and fracture response of as-built direct metal laser sintered (DMLS) Stainless Steel GP1. Preliminary results indicate fatigue failure in specimens prior to reaching strain ranges where plasticity effects become more pronounced. Also evident is variation in cyclic softening/hardening response to stabilization at elastic versus plastic strain ranges. Scanning electron microscopy was used to identify the precursors for fatigue crack initiation and propagation under progressive amplitude fatigue loading.