Work

Additive manufacturing of defect-free TiZrNbTa refractory high-entropy alloy with enhanced elastic isotropy via in-situ alloying of elemental powders

Year: 2024

Type: article

Abstract: Laser powder-bed fusion (L-PBF) additive manufacturing presents ample opportunities to produce net-shape parts. The complex laser-powder interactions result in high cooling rates that often lead to unique microstructures and excellent mechanical properties. Refractory high-entropy alloys show great potential for high-temperature applications but are notoriously difficult to process by additive processes due to their sensitivity to cracking and defects, such as un-melted powders and keyholes. Here, we present a method based on a normalized model-based processing diagram to achieve a nearly defect-free TiZrNbTa alloy via in-situ alloying of elemental powders during L-PBF. Compared to its as-cast counterpart, the as-printed TiZrNbTa exhibits comparable mechanical properties but with enhanced elastic isotropy. This method has good potential for other refractory alloy systems based on in-situ alloying of elemental powders, thereby creating new opportunities to rapidly expand the collection of processable refractory materials via L-PBF.

Source: Communications Materials

DOI: 10.1038/s43246-024-00452-0

Authors: Shahryar Mooraj, George Kim, Xuesong Fan, Shmuel Samuha, Yujun Xie, Tianyi Li, Jaimie S. Tiley, Yan Chen, Dunji Yu, Ke An, Peter Hosemann, Peter K. Liaw, Wei Chen, Wen Chen

Institutions: University of Massachusetts Amherst, Illinois Institute of Technology, University of Tennessee at Knoxville, University of California, Berkeley, Argonne National Laboratory, Oak Ridge National Laboratory, University at Buffalo, State University of New York

Language: English

Topic: High Entropy Alloys Studies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,490

Funders: National Science Foundation, U.S. Department of Energy, University of Massachusetts Amherst, Division of Materials Research, Basic Energy Sciences, Army Research Office, Argonne National Laboratory, Oak Ridge National Laboratory

Awards: CAREER: Understanding Microstructure Evolution and Deformation Mechanism of Strong yet Ductile Nanolamellar High-Entropy Alloys Produced by Additive Manufacturing, G1572340682, G1646662101, G1697052219, G2747436919, G2793697459, G3152192065, G3627450498, Fundamental Study of Low-Cycle-Fatigue Behavior of High-Entropy Alloys, G5015135572, G5675951102, G608057831, G6274897657, G6460610086, G648842122, G6710485660, Collaborative Research: Nanoscale Structural and Compositional Instability-Driven Ductility in Refractory High-Entropy Alloys, CAREER: First-principles Predictive Understanding of Chemical Order in Complex Concentrated Alloys: Structures, Dynamics, and Defect Characteristics, Collaborative Research: In situ Diffraction and Cohesive-Zone Studies of the Fatigue-Crack-Growth Behavior in Mg Alloys, G7452299184, G7683027053, Collaborative Research: I-AIM: Interpretable Augmented Intelligence for Multiscale Material Discovery, G8415477955, G8522281394, G8727049869, G8758690722, G8783338306

OpenAlex ID: W4391893530

FWCI: 8.798

Cites: 78

Cited by: 68

Related to: 10