Surface Integrity of Ultrasonically-Assisted Milled Ti6Al4V Alloy Manufactured by Selective Laser Melting

Abstract The Ti6Al4V parts produced by the existing selective laser melting (SLM) are mainly confronted with poor surface finish and inevitable interior defects, which substantially deteriorates mechanical properties performances of parts. In this regard, ultrasonically-assisted machining (UAM) technique is commonly introduced to improve quality due its merits in increasing tool life reducing cutting force. However, most previous studies focus on performance UAM ultrasonic vibrations applied tangential feed directions, whereas few them impact vibration along vertical direction. study, effects rate integrity milling (UAVM) alloy manufactured SLM were systemically investigated compared conventional (CM) method. results revealed that forces UAVM showed a lower amplitude than CM intermittent style. roughness values generally greater owing extra sinusoidal textures induced cutter. Moreover, was beneficial suppressing chatter. As increased, microhardness thickness plastic deformation zone raised more intensive deformation, while these two material reduced mitigated effect high-frequency Therefore, improved subsurface layer ascribed cutter UAVM. general, study provided an in-depth understanding SLM.