Chip formation of the ultrafine-grained materials in macro and micromilling

• Grant number: 12/01218-7
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2012
• End date: March 31, 2013
• Field of knowledge: Engineering - Mechanical Engineering - Manufacturing Processes
• Principal Investigator: Alessandro Roger Rodrigues
• Grantee: Vlademir Caetano Ferreira Alves
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

This research aims to evaluate the effect of macro and micromachining on the chip formation of ultrafine-grained and "as received" materials. The correlation between chip formation and specific cutting energy will be carried out. The machining tests will be done in a CNC machine center Hermle by using coated endmills and dry conditions. The milling parameters will be defined by considering pre-tests and data recommended by tool suppliers. This project is considered original given the recent research about micromilling in Brazil and unknown machinability data of ultrafine-grained materials. These materials were developed by partnership among UNESP-Ilha Solteira, USP-São Carlos and UFSCar. In fact, the ultrafine-grained material proposed for this project is an improved version of the previous one. In this version, the grain size was reduced to 0.9 micrometers in order to balance the mechanical resistance and toughness providing new mechanical properties to the material. Thus, this material version needs new studies of machinability by adopting macro and micro-milling mainly for the microscale due to the reduced grain size of workpiece material and potential manufacturing of microcomponents.(AU)