TY - JOUR
T1 - The Effect of Discharge Current and Pulse-On Time on Biocompatible Zr-based BMG Sinking-EDM
AU - Pradana, Yanuar Rohmat Aji
AU - Ferara, Aldi
AU - Aminnudin, Aminnudin
AU - Wahono, Wahono
AU - Jang, Jason Shian Ching
N1 - Publisher Copyright:
© 2020 Yanuar Rohmat Aji Pradana, Aldi Ferara, Aminnudin Aminnudin, Wahono Wahono, and Jason Shian-Ching Jang, published by De Gruyter 2020.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - The machinability information of Zr-based bulk metallic glasses (BMGs) are recently limited but essential to provide technological recommendation for the fabrication of the medical devices due to the material's metastable nature. This study aims to investigate the material removal rate (MRR) and surface roughness under different current and pulse-on time of newly developed Ni- A nd Cu-free Zr-based BMG using sinking-electrical discharge machining (EDM). By using weightloss calculation, surface roughness test and scanning electron microscopy (SEM) observation on the workpiece after machining, both MRR and surface roughness were obtained to be increased up to 0.594 mm3/min and 5.50 μm, respectively, when the higher current was applied. On the other hand, the longer pulse-on time shifted the Ra into the higher value but lower the MRR value to only 0.183 mm3/min at 150 μs. Contrary, the surface hardness value was enhanced by both higher current and pulse-on time applied during machining indicating different level of structural change after high-temperature spark exposure on the BMG surface. These phenomena are strongly related to the surface evaporation which characterize the formation of crater and recast layer in various thicknesses and morphologies as well as the crystallization under the different discharge energy and exposure time.
AB - The machinability information of Zr-based bulk metallic glasses (BMGs) are recently limited but essential to provide technological recommendation for the fabrication of the medical devices due to the material's metastable nature. This study aims to investigate the material removal rate (MRR) and surface roughness under different current and pulse-on time of newly developed Ni- A nd Cu-free Zr-based BMG using sinking-electrical discharge machining (EDM). By using weightloss calculation, surface roughness test and scanning electron microscopy (SEM) observation on the workpiece after machining, both MRR and surface roughness were obtained to be increased up to 0.594 mm3/min and 5.50 μm, respectively, when the higher current was applied. On the other hand, the longer pulse-on time shifted the Ra into the higher value but lower the MRR value to only 0.183 mm3/min at 150 μs. Contrary, the surface hardness value was enhanced by both higher current and pulse-on time applied during machining indicating different level of structural change after high-temperature spark exposure on the BMG surface. These phenomena are strongly related to the surface evaporation which characterize the formation of crater and recast layer in various thicknesses and morphologies as well as the crystallization under the different discharge energy and exposure time.
KW - Biocompatible Zr-based BMG
KW - Discharge current
KW - Pulse-on time
KW - Sinking-EDM
UR - http://www.scopus.com/inward/record.url?scp=85086846493&partnerID=8YFLogxK
U2 - 10.1515/eng-2020-0049
DO - 10.1515/eng-2020-0049
M3 - 期刊論文
AN - SCOPUS:85086846493
SN - 2391-5439
VL - 10
SP - 401
EP - 407
JO - Open Engineering
JF - Open Engineering
IS - 1
ER -