MICROSTRUCTURAL CHARACTERIZATION OF LASER PROCESSED COATING OF Al-Fe-Cr-Mn ON ALUMINUM ALLOYS

• Grant number: 08/05454-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: September 01, 2008
• End date: July 31, 2010
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Claudio Shyinti Kiminami
• Grantee: Sílvia Massae Tomonari Yamasaki
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 05/59594-0 - Properties of amorphous, metastable and nano-structured metallic alloys, AP.TEM

Abstract

The rapid solidification as "non-equilibrium" processing has been used for both properties and performance improvements of classical alloys and new alloys compositions developments. These new alloys include those with quasi-crystalline phases which present high mechanical properties, comparable to the intermetallic compounds and ceramic materials. These alloys are brittle at room temperature but show some ductility at high temperatures. Due their exclusive characteristics as low stickness, hardness, low friction coefficient, high wear resistance and low thermal conductivity, such alloys are considered potential candidates for many industrial applications. In the Temátic Project, proc. 2005/59594-0, "Properties of amorphous, metastable and nano-structured metallic alloys" we are studying the possibility to produce superficial coating containing quase-crystalline phases using Al92Fe3Cr2Mn3 alloy powders on conventional aluminum alloys, A7021 e A356, by using two steps laser processing (pre-placed laser cladding) with multi-trail method. The present Research Project for Cientific Iniciation is included in above study and it is proposed considering the academic grade of the student (4th semester). This projet propose the microstructural characterization by optical microscopy of the substrate and transition zone between the substrate and coating, applying also microhardness for describing the transition zone. Also the wear resistance test will be performed for evaluation of this important tecnological characteristic.