Study on Changes in Hardness and Wear Resistance of 3D Printed Ti6Al4V with Heat Treatment Temperature

Abstract

The hardness and specific wear rate of 3 dimensionally (3D) printed Ti6Al4V specimens were studied with respect to heat treatment temperature (HTT) in a range of 400-800 °C. Increasing the HTT from 400 °C to 500 °C promoted the hardness of the printed specimen while its decreased hardness associated with a further increase in the HTT to 800 °C was observed. Since higher wear resistance was the result of higher hardness, the trend of specific wear rate versus HTT of the printed specimen was opposite to that of its hardness versus HTT. The highest hardness and lowest wear of the printed specimen were therefore found at the HTT of 500 °C.

3D-printed titanium-aluminum-vanadium alloy produced at various laser powers: evaluation of microstructures and mechanical characteristics

“…The grains in all samples were uniformly distributed accompanied by very low porosity only at higher laser power. The EDX spectra of the 3D printed Ti6Al4V alloys (Figures (a2-e2)) detected Ti, Al, and V elements [5,34] together with the wear tracks of additional O element that emerged from the dry-sliding-induced oxidation process [35]. The Atomic% of the elements Ti and O were higher in the FCC phase than other phases.…”

“…This process can make layered materials more e ciently than traditional subtractive manufacturing process (TSMP) [3,4]. Earlier, 3D printing technology was utilized to manufacture complicated structures and composites through AM procedures wherein tiny layers of materials were added based on a computerized model without the need of costly machineries, forms, or integrating multiple parts [5][6][7]. It is classi ed into two categories including powder bed-based electron beam melting (PB-EBM) and laser-based 3D printing processes called direct laser metal deposition (DLMD).…”

Effects of Shot Peening Pressure on Friction and Wear of High Pressure Cold Sprayed Ti-6Al-4V Coatings Under Dry and Lubrication Conditions

“…The surface and cross-sectional microstructures of the HPCSTi64-Coats were observed using optical microscopy (OM). Prior to the OM observation, epoxy molded HPCSTi64-Coats were polished to achieve their mirror-like surfaces, and then etched with Kroll's reagent for their detailed microstructures [3,4]. The wear scars of the worn 100Cr6 steel balls were captured by the OM immediately after the tests were completed.…”

“…In aerospace industry, Ti-6Al-4V (Ti64), which has good machinability, good mechanical properties and light weight, is tirelessly used to make aircraft components [1][2][3]. Low abrasive wear resistance of Ti64, however, can lead to physical damages of Ti64 based aircraft components in their long-service so such damaged expensive components are necessarily repaired using traditional high-temperaturerepair-technologies such as thermal-spraying and welding [3][4][5].…”

“…In aerospace industry, Ti-6Al-4V (Ti64), which has good machinability, good mechanical properties and light weight, is tirelessly used to make aircraft components [1][2][3]. Low abrasive wear resistance of Ti64, however, can lead to physical damages of Ti64 based aircraft components in their long-service so such damaged expensive components are necessarily repaired using traditional high-temperaturerepair-technologies such as thermal-spraying and welding [3][4][5]. Unfortunately, the hightemperature-repair-technologies create intrinsic RESEARCH problems in built metallic materials such as high porosity level, thermal residual stress and oxidation level, limiting production of high quality metallic materials [4,6,7].…”