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Ductile to Brittle Transition of AlTiC

                


Project Time Frame: December 2008 – March 2009 

Material: Aluminum Titanium Carbide (AlTiC)         

Project Aim: To establish a Ductile to Brittle Transition (DBT)/critical depth of cut for the material with a specifically defined cutting direction and crystal orientation.

Project Description: AlTiC, like other brittle materials, is known for its poor machinability. However, ductile-regime machining is possible under certain conditions. This can be achieved if machining occurs at depths less than the critical depth of cut. Beyond this value, a Ductile-to-Brittle Transition (DBT) occurs and the material behaves in a brittle-fracture manner. The purpose of this research is to determine the DBT for AlTiC by performing scratches with varying loads. The depth of cut is adjusted by altering the applied load (thrust force) over a range of 10mN to 300mN in order to cover the entire ductile to brittle-regime and the corresponding material removal behavior. The scratch tests were carried out on the Universal Micro Tribometer (UMT). The scratches were imaged and measured using the WYKO white light interferometer.








Project in Detail: View

Material Data Sheet: View

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