Microstructure and Wear Properties of Electron Beam Melted Ti-6Al-4V Parts: A Comparison Study against As-Cast Form

Toh, Wei Quan; Wang, Pan; Tan, Xipeng; Nai, Mui Ling Sharon; Liu, Erjia; Tor, Shu Beng

doi:10.3390/met6110284

Cited by 55 publications

(24 citation statements)

References 30 publications

(46 reference statements)

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“…Even though, the authors reported that SLM-produced CP-Ti exhibited better wear resistance and attributed this behaviour to its microstructure having α′ phase and finer grains. Toh et al (2016) investigated the dry sliding wear behaviour of Ti6Al4V alloy produced by electron beam melting (EBM), that is a similar technique to SLM, by testing against a 6 mm diameter of 100Cr6 steel ball under 1 N normal load, 2 cm/s sliding speed during 50000 cycles, where as-cast Ti6Al4V alloy was used as a control group. Although similar wear characteristics were observed on the samples produced by two different techniques, EBM-produced samples presented higher wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Corrosion and tribocorrosion behaviour of Ti6Al4V produced by selective laser melting and hot pressing in comparison with the commercial alloy

Toptan

Alves

Carvalho

et al. 2019

Journal of Materials Processing Technology

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The corrosion and tribocorrosion behaviour of SLM-produced Ti6Al4V alloy was studied in comparison with its HP and commercial counterparts in 9 g/L NaCl solution at body temperature. Results showed that SLM processing route influenced the electrochemical response of the SLM-produced alloy by leading to a relatively lower quality for the passive film due to decreased β phase and the formation of α′ phase. However, after tribocorrosion, neither the total volume loss nor the volume loss under the influence of mechanical wear and wearaccelerated corrosion showed any statistically significant difference between the processing routes.

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Section: Introductionmentioning

confidence: 99%

Corrosion and tribocorrosion behaviour of Ti6Al4V produced by selective laser melting and hot pressing in comparison with the commercial alloy

Toptan

Alves

Carvalho

et al. 2019

Journal of Materials Processing Technology

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“…During this period, the dominated wear mechanism was severe adhesive wear and abrasive wear. Analogous wear behavior was studied in EBM Ti-6Al-4V parts by Toh et al [ 36 ]. When wear time reached at 6~15 min, these small debris were welded on worn surface too.…”

Section: Resultsmentioning

confidence: 99%

Influence of Ultrasonic Surface Rolling on Microstructure and Wear Behavior of Selective Laser Melted Ti-6Al-4V Alloy

et al. 2017

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The present article studied the effect of ultrasonic surface rolling process (USRP) on the microstructure and wear behavior of a selective laser melted Ti-6Al-4V alloy. Surface characteristics were investigated using optical microscope, nano-indentation, scanning electron microscope, transmission electron microscope and laser scanning confocal microscope. Results indicated that the thickness of pore-free surfaces increased to 100~200 μm with the increasing ultrasonic surface rolling numbers. Severe work hardening occurred in the densified layer, resulting in the formation of refined grains, dislocation walls and deformation twins. After 1000 N 6 passes, about 15.5% and 14.1% increment in surficial Nano-hardness and Vickers-hardness was obtained, respectively. The hardness decreased gradually from the top surface to the substrate. Wear tests revealed that the friction coefficient declined from 0.74 (polished surface) to 0.64 (USRP treated surface) and the wear volume reduced from 0.205 mm−3 to 0.195 mm−3. The difference in wear volume between USRP treated and polished samples increased with sliding time. The enhanced wear resistance was concluded to be associated with the improvement of hardness and shear resistance and also the inhibition of delamination initiation.

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“…This is accompanied by a coarsening of the lamellar α phase. With an increase in bulk energy density, α lamellae can grow coarser [39][40][41].…”

Section: Direct Energy Deposition By Laser Wire (Lw)mentioning

confidence: 99%

Variations in the Surface Integrity of Ti-6Al-4V by Combinations of Additive and Subtractive Manufacturing Processes

et al. 2020

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Additive manufacturing (AM) has recently been accorded considerable interest by manufacturers. Many manufacturing industries, amongst others in the aerospace sector, are already using AM parts or are investing in such manufacturing methods. Important material properties, such as microstructures, residual stress, and surface topography, can be affected by AM processes. In addition, a subtractive manufacturing (SM) process, such as machining, is required for finishing certain parts when accurate tolerances are required. This finish machining will subsequently affect the surface integrity and topography of the material. In this research work, we focused on the surface integrity of Ti-6Al-4V parts manufactured using three different types of AM and finished using an SM step. The aim of this study was to gain an understanding on how each process affects the resulting surface integrity of the material. It was found that each AM process affects the materials’ properties differently and that clear differences exist compared to a reference material manufactured using conventional methods. The newly generated surface was investigated after the SM step and each combination of AM/SM resulted in differences in surface integrity. It was found that different AM processes result in different microstructures which in turn affect surface integrity after the SM process.

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Microstructure and Wear Properties of Electron Beam Melted Ti-6Al-4V Parts: A Comparison Study against As-Cast Form

Cited by 55 publications

References 30 publications

Corrosion and tribocorrosion behaviour of Ti6Al4V produced by selective laser melting and hot pressing in comparison with the commercial alloy

Corrosion and tribocorrosion behaviour of Ti6Al4V produced by selective laser melting and hot pressing in comparison with the commercial alloy

Influence of Ultrasonic Surface Rolling on Microstructure and Wear Behavior of Selective Laser Melted Ti-6Al-4V Alloy

Variations in the Surface Integrity of Ti-6Al-4V by Combinations of Additive and Subtractive Manufacturing Processes

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