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Exploiting near-eutectic high entropy alloys for semisolid metal processing

Grant number: 19/11374-5
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): April 10, 2020
Effective date (End): April 09, 2021
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Rubens Caram Junior
Grantee:Kaio Niitsu Campo
Supervisor abroad: Sheng Guo
Home Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Local de pesquisa : Chalmers University of Technology, Sweden  
Associated to the scholarship:18/10190-5 - Design and semisolid processing of High-Entropy Alloys based on the CrCuFeMnNi system, BP.PD

Abstract

Multicomponent alloys usually applying several elements in equiatomic or near-equiatomic ratios are a recent new class of metallic materials, being commonly referred to as high entropy alloys (HEAs) in the literature. There is an enormous variety of compositions and microstructures that can be explored, leading to the same diversity of mechanical and physical properties. Among them, eutectic HEAs have been given great attention due to the possibility of obtaining more balanced mechanical properties by combining soft and hard phases in a cooperative growth mode. Nonetheless, the successful application of HEAs in commercial scale strongly depends on their processability aspects. In this regard, semisolid processing can be a cost-effective approach to manufacture this class of alloys. Consequently, the identification and design of compositions that are amenable to the process is a very attractive research avenue. Taking into account that there are several successful examples of industrial semisolid processes employing the hypoeutectic A356 Al alloy, it is strongly suggested that semisolid processing can be similarly used in hypoeutectic and hypereutectic HEAs. Accordingly, the present research project endeavor to design HEAs with eutectic structures for semisolid processing. This will include theoretical and experimental investigations. The first will help to target preliminary compositions, whereas the second is intended to evaluate the selected compositions based on their melting and solidification behaviors, globularization performance, phase formation and stability, and mechanical properties. It is expected that the obtained results point out promising HEAs with respect to both their mechanical and processability properties.