Machining of Bulk Metallic Glass. Show full item record. Title: Machining of Bulk Metallic Glass. Author: Bakkal, Mustafa. Advisors: Eric C Klang, Committee Member. Albert J Shih, Committee Chair. Jeffrey W Eischen, Committee Member. Carl C. Koch, Committee Member. Abstract: The turning and drilling of Zr. Ti. 5Cu. 17. 9. Ni. Al. 10 metallic glass (BMG) are evaluated in this study. The mechanics of machining and chip formation and characterization are investigated. In the lathe turning of BMG, above a threshold cutting speed, the low thermal conductivity of BMG leads to chip temperatures high enough to cause the chip oxidation and associated light emission. The high temperature produced by this exothermic chemical reaction causes crystallization within the chips. Oxide layer, amorphous region, fully crystalline region, and crystalline- amorphous transition region are observed in the cross- section of the chips. Working principle of lathe tool dynamometer? Would you like to merge this question into it? Would you like to make it the primary and. Tool Dynamometer - Unitech Scales And Measurements Pvt. Manufacturer and Supplier of Tool Dynamometer, Lathe Tool Dynamometer, Milling Tool Dynamometer, Drill Tool Dynamometer and Grinding Tool. Drill tool dynamometer for measurement of both the thrust force of the control and the torque produced on the work piece. Used to establish drilling force. Microsoft Word - IEICOS-Machine-Tool-Dynamometer-Brochure In this study, performance testing of the designed and constructed two-dimensional strain gage type drilling dynamometer has been carried out with the help of a. Tool Tool holder dynamometer Strain gauges Fig. 10.8 Schematic view of a strain gauge type 2 – D turning dynamometer. Version 2 ME IIT, Kharagpur. 10.9 Photographs of a strain gauge type 2 – D turning dynamometer. The x- ray diffraction peaks match the pattern for monoclinic Zr. O2. Turning chips morphology suggests that increasing amounts of viscous flow control the chip- removal process. Moreover, viscous flow and crystallization can occur during the machining of the bulk metallic glass, even under the high temperature gradient and strain rate. For the BMG chip without light emission, the serrated chip with adiabatic shear band and void formation was observed. High cutting speed significantly reduced the forces for BMG machining due to thermal softening. DRILLING THE BULK METALLIC GLASS. Two drill tool-materials, M7 high speed. Tool Temperature in Titanium Drilling. Under the drill holder was a Kistler 9272 dynamometer to measure the thrust force and torque. The tool geometries of the metal drill are a tool material of high speed tool steels (JIS SKH51), a drill diameter of dt=2 mm. Determination and comparison of drill seeder draft in. Roughness of machined BMG surfaces is generally better than that of Al. T6 and SS3. 04. Tool wear is a problem for BMG turning. Chipping and thermal softening on the lathe tool cutting edges can be observed. Drilling of BMG shows that holes with precision geometry and good surface roughness can be efficiently produced in BMG using the high speed steel and WC- Co drills at spindle speed that does not exceed the limit for chip light emission. Morphology of BMG drilling chip are classified and analyzed. The thermal conductivity of tool material and cutting speed are concluded as two critical factors that triggered the chip exothermic oxidation and light emission. The chip light emission has profound impact on the drill wear, as shown by the experimentally measured thrust force and torque.
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