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Experimental investigation on friction drilling of titanium alloy

Friction drilling is a green hole-making process that zealously utilizes the heat generated from the friction between the rotating conical tool and workpiece to create a bushing without generating chip. The difficult-to-machine materials with unique metallurgical properties have been developed to meet the demands of extreme applications. | Experimental investigation on friction drilling of titanium alloy Engineering Solid Mechanics 2018 135-142 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm Experimental investigation on friction drilling of titanium alloy S. Dehghan M. I. S. Ismail M. K. A. Ariffin and B. T. H. T. Baharudin Department of Mechanical and Manufacturing Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia A R T I C L EI N F O ABSTRACT Article history Friction drilling is a green hole-making process that zealously utilizes the heat generated from Received 22 November 2017 the friction between the rotating conical tool and workpiece to create a bushing without Accepted 18 February 2018 generating chip. The difficult-to-machine materials with unique metallurgical properties have Available online been developed to meet the demands of extreme applications. However the major challenges 18 February 2018 Keywords of friction drilling on difficult-to-machine materials are the hole diameter accuracy petal Friction drilling formation and tool wear. In this study the effects of process parameters such as spindle speed Dry machining and feed rate on bushing height and shape hardness and tool wear in friction drilling of titanium Difficult-to-machine material alloy Ti-6Al-4V were experimentally investigated using tungsten carbide tool. Optical Titanium alloy photographs have also been analyzed for better understanding of the chipless friction drilling Tool wear process for different parametric settings. Experimental results indicated that the spindle speed has great influences for achieving better bushing formation and prolong the tool life. It was confirmed that the low spindle speed and low feed rate have great influences for achieving better bushing shape and height prolong tool life and lower hardness that located adjacent to the hole wall. It also was discovered that the low thermal .