尼蒙
材料科学
可加工性
机械加工
高温合金
超声波传感器
刀具磨损
GSM演进的增强数据速率
冶金
碳化物
复合材料
声学
合金
计算机科学
电信
物理
作者
Jay Airao,Chandrakant K. Nirala,Luís Norberto López de Lacalle,Navneet Khanna
出处
期刊:Metals
[Multidisciplinary Digital Publishing Institute]
日期:2021-08-07
卷期号:11 (8): 1253-1253
被引量:24
摘要
Nickel-based superalloys are widely used in the aerospace, automotive, marine and medical sectors, owing to their high mechanical strength and corrosion resistance. However, they exhibit poor machinability due to low thermal conductivity, high shear modulus, strain hardening, etc. Various modifications have been incorporated into existing machining techniques to address these issues. One such modification is the incorporation of ultrasonic assistance to turning operations. The assisted process is popularly known as ultrasonic assisted turning (UAT), and uses ultrasonic vibration to the processing zone to cut the material. The present article investigates the effect of ultrasonic vibration on coated carbide tool wear for machining Nimonic-90 under dry and wet conditions. UAT and conventional turning (CT) were performed at constant cutting speed, feed rate and depth of cut. The results show that the main wear mechanisms were abrasion, chipping, notch wear and adhesion of the built-up edge in both processes. However, by using a coolant, the formation of the built-up edge was reduced. CT and UAT under dry conditions showed an approximate reduction of 20% in the width of flank wear compared to CT and UAT under wet conditions. UAT showed approximate reductions of 6–20% in cutting force and 13–27% in feed force compared to the CT process. The chips formed during UAT were thinner, smoother and shorter than those formed during CT.
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