|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Large-scale Metallic Components
||A Comparative Study between the Laser Metal Deposition and Selective Laser Melting of AlxCoCrFeNi MPEA
||Praveen Sreeramagiri, Husam Alrehaili, Xin Wu, Ganesh Balasubramanian
|On-Site Speaker (Planned)
Additive manufacturing is a versatile manufacturing technique that can expedite the exploration of new alloys. Various processes like powder bed fusion (PBF), laser metal deposition (LMD), etc., within additive manufacturing, have unearthed a point of debate regarding the quality of the samples and the fabricability of the materials synthesized by these techniques. We attempt to compare the fabricability, quality and mechanical properties of AlxCoCrFeNi synthesized by PBF and LMD. The equiatomic composition processed using PBF revealed interlayer cracks, due to superior hardness resulting in high residual stresses. The high residual stresses are presumed to result from high cooling rates (~10^6 K/s) during processing. In contrast, samples processed with LMD revealed crack-free ~100% dense deposits, due to relatively low cooling rates (~10^4 K/s). In addition, we report the effect of varying Al content on the fabricability and microstructural evolution of samples processed by PBF and LMD.
||Additive Manufacturing, High-Entropy Alloys, Other