Work

Design of non-equiatomic low-density alloys inspired by modified high-entropy shape memory alloy

Year: 2025

Type: article

Abstract: The increasing demand for lightweight, high-performance materials in advanced structural applications has driven significant research into low-density high entropy alloys and shape memory alloys. This study focuses on the development and characterization of a non-equiatomic, low-density, multi-phase (Ti6Al4V) 50 (Ni+Co) 50 alloy, inspired by modified high-entropy alloy design principles and optimized for advanced structural applications. The alloy exhibits a refined microstructure, a significantly reduced density of approximately 5.2 g/cm 3 ′ - lower than conventional nickel-based shape memory alloys and other low-density high-entropy alloys - and superior mechanical properties, including high compressive yield strength. Strain recovery experiments and DSC analysis also confirm shape memory characteristics, supporting its potential use in functional applications. These properties, combined with its printability in laser powder bed fusion (LPBF), make the (Ti6Al4V)50(Ni+Co)50 alloy a candidate for additive manufacturing, exhibiting low porosity and minimal cracking during processing.

Source: Journal of Materials Research and Technology

DOI: 10.1016/j.jmrt.2025.02.059

Authors: Gonçalo Abrantes, Bernardo Alves, Daniel Gatões, Rodolfo Batalha, Patrícia Freitas Rodrigues

Institutions: University of Coimbra, Instituto de Soldadura e Qualidade

Language: English

Topic: High Entropy Alloys Studies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,640

Funders: Universidade Nova de Lisboa, Fundação para a Ciência e a Tecnologia