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Microstructure and hardness of laser remelted surfaces of Al-5%Cu and Al-4%Cu-1%Ni alloys by Aline Ferreira Schon; Guilherme Lisboa de Gouveia; Bruno Silva Sobral; José Eduardo Spinelli; Rudimar Riva; Aline Gonçalves Capella; Bismarck Luiz Silva is a Materials Science article available to read on EtoBox.

What is Microstructure and hardness of laser remelted surfaces of Al-5%Cu and Al-4%Cu-1%Ni alloys about?

Al-based alloys are potential candidates for advanced rapid solidification processes, such as Laser Surface Remelting (LSR) and Additive Manufacturing (AM). However, currently few alloy candidates have emerged for use such as AlSi12 eutectic and AlSi10Mg. This occurs because other alloys are more susceptible to the formation of defects such as porosity, cracks and distortions, which impair high-performance applications. The addition of Ni in Al-Cu alloys is expected to improve the mechanical properties at high temperatures and favors the reduction of the solidification interval, which may decrease the fraction of solidification cracking and porosity. Given the context, the present work investigates the microstructural changes and hardness of Al-5 wt%Cu and Al-4 wt%Cu-1 wt%Ni alloys processed either by centrifugal casting or LSR. By varying laser beam speed and laser average power, a total of 4 combinations for each alloy was accomplished. The CALPHAD computations with 1%Ni alloying revealed a solidification interval reduction of approximately 30%, without reducing the total intermetallics fraction if compared to the binary Al-5%Cu alloy. The microstructure of the rapidly solidified

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Author

Aline Ferreira Schon; Guilherme Lisboa de Gouveia; Bruno Silva Sobral; José Eduardo Spinelli; Rudimar Riva; Aline Gonçalves Capella; Bismarck Luiz Silva

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)