Tool Failure Criteria while Drilling Titanium Alloys

Suresh Palanisamy; Luo Cong; Viktor Verijenko; Stuart D. McDonald; Robert Owen; Matthew S. Dargusch

doi:10.4028/www.scientific.net/MSF.654-656.2531

Paper Titles

A Study of Toughness Degradation in CA6NM Stainless Steel
p.2515

Hydrogen Evolution Behavior during Tensile Deformation in Austenitic Stainless Steels Exposed to High Compressed Hydrogen Atmospheres
p.2519

The Microstructure and Mechanical Properties of Ni-Based Superalloy after Service Exposure in Gas Turbine
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Wear Resistance and Microstructural Study of Diamond Coated WC Tools
p.2527

Tool Failure Criteria while Drilling Titanium Alloys
p.2531

Effects of Strain Rate on Mechanical Properties and Microstructure of V-5Cr-5Ti Alloy
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Failure Analysis on the Rivet
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High-Speed Fracture Phenomena of Glass Bottle by Underwater Shock Wave
p.2543

Design of Pre-Weakening and Evaluation of Structural Safety for Explosive Demolition of Concrete Silo
p.2548

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Tool Failure Criteria while Drilling Titanium Alloys

Abstract:

This paper presents a feasible machining test to measure, compare and predict the machinability of different titanium alloys. A drilling test was developed and investigated on the two most common grades of titanium, commercial purity and Ti6Al4V. The experiments and analysis revealed that tool wear followed a characteristic pattern for all machining conditions investigated. When machining Ti6Al4V, tool life was shorter and cutting forces higher compared with commercial purity Ti. Paradoxically, despite the more difficult machining, Ti6Al4V samples had better surface integrity than commercial purity samples. A procedure was developed that could be incorporated into a real-time process monitoring device to warn of imminent tool failure.