Abstract
Eliminating hot cracking and achieving a good strength-ductility synergy in selective laser melted (SLMed) high-strength aluminium alloys remain challenging. We here inoculated 7050 high-strength aluminium alloy with 2 wt% Ti nanoparticles to eliminate hot cracking during SLM. Furthermore, ultrafine equiaxed grains with random textures were achieved in SLMed 7050 – 2 wt% Ti alloy, in contrast to the textured columnar grains observed in SLMed 7050 alloy. A high tensile yield strength of 393 MPa and an elongation of 11.6 % were achieved in SLMed 7050 – 2 wt% Ti alloy.
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