Influence of Carbon on Additively Manufactured Ti-6Al-4V

Abstract

In this study, the Ti-6Al-4V powder material for additive manufacturing was mixed with amorphous carbon and processed by powder bed fusion using a laser beam. The specimens were subjected to mechanical and microstructural analyses to investigate the impact of the organic constituent that may become introduced unintentionally as an impurity along the powder handling chain. It is documented that hardness and tensile strength increase with increasing carbon content up to 0.2 wt.%. Above this carbon concentration, extensive crack formation in the samples prevents successful procession.

Keywords

• Ti-6Al-4V
• carbon
• laser melting
• powder-bed fusion
• organic impurity
• strength increase