|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||High Cycle Fatigue in Metastable High Entropy Alloy by Laser Powder Bed Additive Manufacturing
||Priyanshi Agrawal, Rajiv Mishra
|On-Site Speaker (Planned)
Fatigue causes catastrophic failure of structural components and fatigue life of additively manufactured materials without post processing is limited due to the presence of processing induced defects. Keeping this is mind fatigue performance of an additively manufactured metastable high entropy alloy Fe40Mn20Co20Cr15Si5 (CS-HEA) made using laser powder bed fusion has been evaluated. CS-HEA showed sustained work hardening due to activation of γ (f.c.c.) → ε (h.c.p.) martensitic transformation and subsequent twinning in ε (h.c.p.) phase. CS-HEA exhibits normalized fatigue strength of 0.65 with respect to the yield strength in as printed condition. Additionally, a fatigue life predictive tool, based on the statistical size distribution and mutual interaction of grains and process induced defects such as pores and unfused powder particles embedded in the microstructure, is used to estimate the fatigue life of as-printed material.
||Additive Manufacturing, High-Entropy Alloys, Mechanical Properties