W7Ni3Fe-Ti6Al4V bimetallic layered structures via directed energy deposition. Issue 1 (1st January 2023)

• Record Type: Journal Article
• Authors: Zhang, Yanning; Groden, Cory; Nyberg, E.; Bandyopadhyay, A.
• Is Part Of: Virtual and physical prototyping. Volume 18:Issue 1(2023)
• Publication Date: 2023-01-01
• Subjects: W7Ni3Fe alloy -- Ti6Al4V -- directed energy deposition -- bimetallic structures -- additive manufacturing; Rapid prototyping -- Periodicals; Virtual computer systems -- Periodicals; Prototypes, Engineering -- Periodicals; Production engineering -- Periodicals; Design, Industrial -- Periodicals; 670.285
• DOI: 10.1080/17452759.2022.2137048
• Languages: English
• ISSNs: 1745-2759

Abstract

ABSTRACT: Bimetallic structures of Ti6Al4V-W7Ni3Fe were fabricated via directed energy deposition (DED)-based additive manufacturing (AM). Our research demonstrates the ability of DED-based AM to control Ti6Al4V-W7Ni3Fe bimetallic structures with tailorable mechanical and thermal performance. The thermal conductivity of the bimetallic structures was three times higher than Ti6Al4V at 300°C. Uniaxial compression along the transverse direction showed a failure strain of 63% compared to pure Ti6Al4V, while the longitudinal direction showed a failure strain of only 37% of Ti6Al4V. Variable hardness was observed throughout the sample due to diffusion of elements and intermetallic phase formations. Scanning electron microscopy revealed that the interfaces in the as-printed samples were crack-free with elemental gradients.