Evaluation of the microestruture and mechanical properties of dissimilar welding joints of aluminum AA5083-O/H111 and naval steel GL D36 welded by friction stir welding (FSW)

• Grant number: 19/04613-3
• Support Opportunities: Scholarships in Brazil - Master
• Start date: June 01, 2019
• End date: January 31, 2021
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Piter Gargarella
• Grantee: Bruna Fernanda Batistão
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

The search for lighter structures with high performance, which integrate a greater number of functions, has led to industrial sectors as automotive, aeronautical and naval to use hybrid structures, where the performance of the product is due to the combination of the different properties of its components. Based on this, steel structures welded with aluminum alloys are in great demand, combining the low cost and high mechanical strength of steels with the weight reduction and the excellent specific strength of the aluminum alloys. The welding of steel with aluminum is difficult due to the great physical and metallurgical differences of these materials. These metallurgical differences may result in the formation of multiple intermetallic compounds (IMC) in the welded joints, which cause the degradation of the mechanical properties of the joint. In this context, solid-state joining processes, such as friction stir welding (FSW), stand out because they reach lower temperatures during the welding process, which difficult the formation of deleterious intermetallic phases. Based on this, the present work proposes the application of the FSW technique to weld steel with aluminum, aiming to achieve a similar or superior performance than that obtained by the welding techniques currently used. The welds were produced by the student at the research institute HZG (Helmholtz-Zentrum Geesthacht) and the objective of this work is to analyze the microstructure and mechanical properties of the joint to understand the metallurgical phenomena derived from the process, as this will provide the knowledge necessary to improve the FSW process for application in the welding of aluminum alloys with steel. (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)

BERGMANN, LUCIANO A.; BATISTAO, BRUNA FERNANDA; DE ALCANTARA, NELSON GUEDES; GARGARELLA, PITER; KLUSEMANN, BENJAMIN. Effect of rotational speed and double-sided welding in friction stir-welded dissimilar joints of aluminum alloy and steel. WELDING IN THE WORLD, v. 66, n. 9, p. 10-pg., 2022-06-28. (19/04613-3)

CHIUZULI, FERNANDA ROCHA; BATISTAO, BRUNA FERNANDA; BERGMANN, LUCIANO ANDREI; DE ALCANTARA, NELSON GUEDES; DOS SANTOS, JORGE FERNANDEZ; KLUSEMANN, BENJAMIN; GARGARELLA, PITER. Effect of the gap width in AZ31 magnesium alloy joints obtained by friction stir welding. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, v. 15, p. 5297-5306, NOV-DEC 2021. (19/04613-3)

BATISTAO, BRUNA FERNANDA; BERGMANN, LUCIANO ANDREI; GARGARELLA, PITER; DE ALCANTARA, NELSON GUEDES; DOS SANTOS, JORGE F.; KLUSEMANN, BENJAMIN. Characterization of dissimilar friction stir welded lap joints of AA5083 and GL D36 steel. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, v. 9, n. 6, p. 15132-15142, NOV-DEC 2020. (19/04613-3)