... but decreased tensile strengths after thermal treatment at 840 °C for 2 h. Sliding wearing tests and cutting experiments were conducted to further understand the effects of heat treatment on machinability. The results showed that as-built SLMed Ti-6Al-4V samples presented lower coefficients of friction...

... orthogonal cutting of annealed AISI 4340 steel (223 HV) with TiN-coated tungsten carbide inserts. Initially, pin-on-disc tests were performed, followed by orthogonal cutting tests. The components of the cutting force were used to calculate the coefficient of friction in orthogonal cutting, and its value...

... alloys. Also, time-dependent prediction of cutting tool wear has not been addressed adequately. In this study, a theoretical model to predict tool wear in drilling as a function of time and to evaluate tool life of anti-abrasion-, TiAlSiN-, and TiAlN-coated drills are presented. Considering feed rate...

...S. V. Sujith; Rahul S. Mulik Major cooling and lubricating properties such as conduction, convection, and lubricant stability at higher temperatures are improvised by the addition of nanoparticle into metal cutting fluids. The present investigation is mainly focused on the effects of pure coconut...

... specimens were cut from the rail head and the dimensions of specimen are illustrated in Fig. 2( a ) . In order to observe and analyze the erosion behavior of the rail steel clearly, the upper surface of the rail specimen was grounded through SiC abrasive papers and then polished by means of diamond...

... to estimate the total erosion rate of all the three materials as a contribution of cutting and deformation wear. Further to identify the wear mechanism, the SEM images of the worn out surfaces of the specimens were examined. Three series of experiments were performed to establish the effect...

...Ranjan Das; Suhas S. Joshi; Harish C. Barshilia In multipoint operations like drilling, cutting velocities and cutting-edge geometries vary along cutting lips so is the rate of progression of flank wear. Analytical evaluation of flank wear land width in the case of complex tools has received...

..., and similar observations have been made by many investigators [ 14 , 30 ]. This is due to the change in material removal mechanism for ductile material with respect to impact angles. The material removal due to cutting wear is dominant at 45 deg impact angle compared to the deformation wear at normal impact...

... layer and cutting surface underneath, are studied. In the debris layer, the change of sp 2 carbon atoms is directly affected by impact, while underneath the cutting surface the changes of carbon atoms are almost not affected; the change speed of amorphous carbon atoms is higher than that of pristine...

...Zhengyang Kang; Yonghong Fu; Jinghu Ji; Liang Tian The aim of this technical brief is to provide a numerical approach to investigate the lubricity enhancement effect of microgrooves texture on tools' rake face. The key parameters related to cutting condition and grooves morphology were considered...

...Frédéric Cabanettes; Julian Rolland; Florian Dumont; Joël Rech; Zlate Dimkovski The possibility to reduce the amount of cutting fluids from machining processes is actively studied by the industrialists and researchers. Minimum quantity lubrication (MQL) is a solution toward cutting fluids reduction...

...Ho Yeung; Yang Guo; James B. Mann; W. Dale Compton; Srinivasan Chandrasekar The deformation field, material flow, and mechanics of chip separation in cutting of metals with superimposed low-frequency modulation (<1000 Hz) are characterized at the mesoscale using high-speed imaging and particle...

...Hamdi Ben Abdelali; Cedric Courbon; Joël Rech; Wacef Ben Salem; Abdelwaheb Dogui; Philippe Kapsa The characterization of frictional phenomena at the tool-chip-workpiece interface in metal cutting remains a challenge. This paper aims at identifying a friction model and a heat partition model...

... of 3, 6, and 8.33 m/s for solid concentrations of 10%, 20%, and 30% (by weight) and particle sizes of 363, 550, and 655 μm. The contribution of cutting wear in the total wear of ductile material at various orientation angles has been determined. It is observed that the maximum cutting wear angle...

... state at about twice the value of the steady-state flux of the tested commercial fluid. Scanning electron microscope imaging was used to further evaluate membrane fouling by each fluid. The machining capabilities of the designed fluid were examined in terms of cutting forces and machining temperature...

... to establish the effect of cutting conditions (speed, feed, and depth of cut) on the cutting forces and time variation of carbide tool wear data in high-speed machining (face milling) of Al–Si cast alloys that are commonly used in the automotive industry. Method and Approach. The experimental setup and force...

..., such as to break the chip-tool contact, is imposed in the direction of cutting. Measurements show that the friction coefficient between tool and chip is reduced by a factor of up to three in the presence of such a modulation. The extent of the secondary deformation zone in the chip material close to the rake face...

...V. Madhavan; S. Chandrasekar; T. N. Farris An experimental study of the chip-tool interface and its evolution in the low speed cutting of metals has been carried out. Specially prepared transparent glass and sapphire tools have been used to cut commercially pure metals such as lead, aluminum...

... range of Peclet numbers, N Pe (0.5–40) using the available experimental data from the literature. metals cutting thermal analysis tribology machining heat transfer mechanical contact Referring to Fig. 7 , the shear plane heat source together with the tool-chip interface frictional heat...

.../condensation was the most important mechanism, followed by centrifugal force, then impaction. For evaporation/condensation, rotational speed and cut depth determined the amount of heat generated during machining, whereas fluid flow determined the amount of heat transferred to the liquid. The flow-rotational...