Fatigue of low density steels conformed by spray forming obtained from recycling cast aluminum alloys

• Grant number: 18/04142-8
• Support Opportunities: Scholarships in Brazil - Master
• Start date: July 01, 2018
• End date: February 29, 2020
• Field of knowledge: Engineering - Materials and Metallurgical Engineering
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Claudemiro Bolfarini
• Grantee: André Luiz Vidilli
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys, AP.TEM

Abstract

Low density steels are advanced materials that are being widely studied because of their high potential to the application in the automotive industry, which seeks the reduction of the structural weight of their vehicles, and consequently, the increase energy efficiency. These steels are highlighted due to high ductility derived from phenomenon of increase of plasticity (TRIP, TWIP and MBIP) and also to the low density obtained from the addition of elements such as Mn, Al and C. The main compositions already studied belong to the Fe-Mn-Al-C system, and both the alloying elements and the material processing are determinants of the final microstructural and, therefore, determine the mechanical properties of the steel. Although much studied today, the behavior of these steels in cyclic loading is still not well understood and there are several divergences in the literature, thus, the objective of this master's project is to evaluate the fatigue of low density steels made from spray forming. The compositions will be determined by means of thermodynamic calculations (aiming at the TRIP and TWIP effect) and obtained through the recycling of cast aluminum alloys, which are also used in the automotive industry (motor block and gearbox, for example). The billets will be manufactured by spray forming and then mechanically shaped until they reach the sheet form. The material will be characterized by optical and electronic microscopy, and test specimens will be machined to perform static and dynamic tests to determine the yield limit, tensile strength limit and fatigue. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VIDILLI, ANDRE L.; OTANI, LUCAS B.; WOLF, WITOR; KIMINAMI, CLAUDIO S.; BOTTA, WALTER J.; COURY, FRANCISCO G.; BOLFARINI, CLAUDEMIRO. Design of a FeMnAlC steel with TWIP effect and evaluation of its tensile and fatigue properties. Journal of Alloys and Compounds, v. 831, AUG 5 2020. (18/04142-8, 13/05987-8)