Abstract
This study investigated the microstructure, mechanical properties, impact toughness, and erosion characteristics of Al-10Si-Mg alloy specimens manufactured using the selective laser melting (SLM) method with or without subsequent T6 heat treatment. Furthermore, the erosion phase transformation behavior of the test specimens was analyzed, and the effect of the degradation mechanism on the tensile mechanical properties and impact toughness of the SLM Al-10Si-Mg alloy specimens before and after particle erosion was compared. The experimental results indicated that the Al-10Si-Mg alloy subjected to T6 heat treatment has better erosion resistance than the as-fabricated material. The tensile strength and fracture toughness of both specimen groups decreased due to the formation of microcracks on the surface caused by particle erosion. Nevertheless, the erosion-induced silicon nanoparticle solid solution softens the Al matrix and improves the elongation of the SLM Al-10Si-Mg alloy.
Highlights
Selective laser melting (SLM) is a type of powder bed fusion technology in which three-dimensional (3D) objects are gradually built layer by layer
The results indicated that the microstructure evolution characteristics and mechanical properties of SLM Al-10Si-Mg alloy were highly valuable
A continuous-wave laser with a wavearrangement and construction direction of the SLM Al-10Si-Mg specimens on the substrate length of 1064 nm and a spot size of 100 μm was employed as the energy source
Summary
Selective laser melting (SLM) is a type of powder bed fusion technology in which three-dimensional (3D) objects are gradually built layer by layer This makes the technology suitable for manufacturing parts with complex geometric shapes. 2 particles to conduct experiments for evaluating induced phase ously, transformation and material failure erosion mechanism of Al-10Si-Mg alloy.the. 4384 Aland alloyimpact and confirmed that Al-10Si-Mg using the SLM process parameters [17],commercial tensile, erosion, test specimens excellent wear resistance were fabricatedalloy fromhas. 2O3 ceramic particles were used instead of SiO2 particles in erosion of heat treatment and erosion phase transformation behavior on the mechanical strength experiments to create a considerably harsher wear environment for examining the eroand impact toughness of the material.
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