公开(公告)号：US20230357899A1

公开(公告)日：2023-11-09

申请号：US18246351

申请日：2021-10-08

Applicant: UNIVERSITY OF NORTH TEXAS

Inventor： Rajiv MISHRA ,  Mageshwari KOMARASAMY ,  Saket THAPLIYAL

IPC: C22C21/00

CPC classification number: C22C21/00

Abstract: Non-equilibrium conditions and distinctive process-dynamics give laser-powder bed fusion (L-PBF) inherent capability to produce unique microstructural-features. However, alloy-design strategies that not only tackle printability-related challenges but also capitalize on such inherent capability, are imperative. Hence, an alloy-design strategy that integrates concepts of grain-refinement and eutectic-solidification is proposed. Consequently, an Al-3Ni-1Ti-0.8Zr (wt. %) alloy has been designed and processed with L-PBF. The alloy exhibits a wide processing-window, indicating excellent printability, and hierarchical features-enabled heterogeneous grain-structured microstructure; a high synergistic as-built strength-ductility is thus obtained. Notably, wide processing-window allows fine-tuning of as-built microstructure, whereas heterogeneous microstructure potentially allows activation of back-stress strengthening and work-hardening.