Author(s): Cunha, A. ; Pinto, J. ; Cerqueira, M. F. ; Silva, F. S. ; Trindade, B. ; Carvalho, O.
Date: 2023
Persistent ID: https://hdl.handle.net/10316/116868
Origin: Estudo Geral - Universidade de Coimbra
Project/scholarship: info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB/PT; info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB/PT; info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP/PT;
Subject(s): Tribology
Multi-material structures make it possible to obtain effective solutions to engineering problems by combining the benefits of different materials to meet the requirements of different working conditions. The aim of this multifunctional 420 stainless steel-copper structure is to create a hybrid solution in which copper acts as heat-transfer enhancer (through cooling channels) while maintaining the required mechanical properties of the steel matrix. This work focuses on a combined engineering process consisting of CNC machining through holes on a 420 stainless steel surface substrate and subsequent filling with copper by hot pressing. The influence of the copper filling on the physical, chemical, microstructural, mechanical, and thermal properties of this multi-material solution was analysed. The machined area (5% of the total surface area) consisted of nine holes with a diameter of approximately 1 mm. The multi-material samples showed high densification, homogeneous microstructures, and a well-defined and sharp interface between the two materials. The microhardness values measured for the 420 stainless steel and copper were 759 and 57 HV, respectively, and the thermal conductivity of the multi-material was ≅ 59% higher than the 420 stainless steel (39.74 and 16.40 W/m K, respectively).
FCT|FCCN (b-on), FCT (Fundação para a Ciência e a Tecnologia) through the grant SFRH/BD/147460/2019 and the reference projects UIDB/04436/2020 and UIDP/04436/2020, UIDB/00285/2020, and LA/P/0112/2020. FEDER, through the Competitiveness and Internationalization Operational Program (POCI), in the projects Add. Addtive POCI-01-0247-FEDER-024533 and POCI 01-0247-FEDER-033361.
