Applicability of LPBF for producing Cu-11Al-5Ni-4Fe wt.% with shape memory properties. (3rd March 2023)

• Record Type: Journal Article
• Authors: Guerra, C; Ramos-Grez, J A; La Fé-Perdomo, I; Castillo, A; Walczak, M
• Is Part Of: Smart materials and structures. Volume 32:Number 4(2023)
• Publication Date: 2023-03-03
• Subjects: additive manufacturing -- shape memory alloy -- selective laser melting -- copper alloy -- LPBF; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/1361-665X/acbdd5
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: The Cu-11Al-5Ni-4Fe wt% alloy was consolidated by additive manufacturing (AM) to determine the method applicability for producing shape memory alloy. The alloy was researched through compressive stress in three conditions: commercial (COM) (cast), as-built (AB), and AB heat treated (quenched). The results demonstrated that the AB sample acquired a reasonable superelasticity (SE) at room temperature (∼4%), which was improved to 6% after quenching. The COM sample damping capacity was better at high temperatures (350 °C) due to slip system activation at low stress (near 600 MPa), which resulted in a higher deformation energy dissipation. Due to the residual stress and null slip activation, the AB samples showed low damping capacity and low permanent strain at any temperature; however, they showed greater degree of SE. The AM technique of laser powder bed fabrication is concluded to be a viable option for producing printed parts with SE and damping properties.