Year: 2026
Type: article
Abstract: This study investigates the feasibility of using recycled aluminum in the production of Cu–Al–Mn shape-memory alloys, with emphasis on the effects of Fe and Ti–B additions on the microstructure, phase transformations, microhardness, superelasticity, and shape recovery. Three alloys were produced by induction melting in an open atmosphere: a reference alloy prepared from high-purity elements and two alloys containing recycled aluminum with additions of 0.50 wt.% Fe and 0.50 wt.% Ti–0.0625 wt.% B, respectively. The alloys were characterized by optical and scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction with MAUD refinement, differential scanning calorimetry, microhardness testing, and compression tests. The results showed that recycled aluminum, combined with Fe and Ti–B additions, modified the microstructure, promoting precipitate formation and increasing the martensite fraction. The alloying additions also altered the transformation temperatures and reduced the transformation enthalpies compared with the reference alloy. An increase in microhardness was observed for the modified alloys, while the Fe-containing alloy exhibited greater elastic recovery and the Ti–B-containing alloy showed greater shape recovery after heating. Overall, the results demonstrate that recycled aluminum can be used as a secondary raw material for producing Cu–Al–Mn shape-memory alloys while maintaining functional properties relevant to shape-memory applications.
Source: Cadernos Cajuína
Authors: Josivan Filho Gonçalves Camilo, Josimar Ferreira Diniz Filho, José de Queiroz Caluête, Danniel Ferreira de Oliveira, Thayza Pacheco dos Santos Barros Caluête, Bruno Alessandro Silva Guedes de Lima, Francisco Riccelly Pereira Feitosa, Ieverton Caiandre Andrade Brito, Jean Pierre Veronese, Willams Giuseppe de Oliveira Santos, Rafael Evaristo Caluête
Institution: Universidade Federal da Paraíba
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7214291606