Microstructural Evolution in Chips during Machining of Commercially Pure (Grade 2) Titanium

Shou Jin Sun; Milan Brandt; Wei Qian Song; Matthew S. Dargusch

doi:10.4028/www.scientific.net/MSF.654-656.823

Paper Titles

Production of Ti-6Al-4V Strip by Direct Rolling of Blended Elemental Powder
p.807

Effects of Impurity Elements on Green Strength of Powder Compacts
p.811

Mechanical Properties of Oxide Dispersion Strengthened Pure Titanium Produced by Powder Metallurgy Method
p.815

Spark Plasma Sintering of Ti-4.5Al-3V-2Fe-2Mo (SP-700)
p.819

Microstructural Evolution in Chips during Machining of Commercially Pure (Grade 2) Titanium
p.823

Effect of Pore Size on Mechanical Properties of Titanium Foams
p.827

Effect of Hydrogen Content on Superplastic Forming and Diffusion Bonding in Ti600 Alloy
p.831

Improvement in Hot Workability of Titanium Matrix Composite by Thermohydrogen Treatment
p.835

Study of Thermal Behavior in a Kroll Reactor for the Optimization of Ti Sponge Production
p.839

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Microstructural Evolution in Chips during Machining of Commercially Pure (Grade 2) Titanium

Abstract:

Development of microstructure in chips during machining of Grade 2 titanium at different cutting speeds has been investigated. The morphology of the chip changes from continuous chip to irregular and regular segmented chip with increasing cutting speed. The deformation in continuous and segmented chips is characterized as continuous and localized shear respectively. The deformation mechanism in the irregular segmented chip is the dislocation slip in the continuous region and twinning around the localized shear. Deformation twinning was observed inside the segment between the shear bands in the regular segmented chip. These deformation twins are responsible for the hardening inside the segment.