Development of a corrosion microprobe for monitoring of the effects of laser micro welding on the properties of Ti-Nb-xSn and Ni-Ti alloys

• Grant number: 16/10637-4
• Support Opportunities: Regular Research Grants
• Start date: August 01, 2016
• End date: September 30, 2018
• Field of knowledge: Engineering - Mechanical Engineering
• Principal Investigator: Rodnei Bertazzoli
• Grantee: Rodnei Bertazzoli
• Host Institution: Divisão de Engenharia Mecânica (IEM). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil

Abstract

The goaql of this project is to develop a corrosion microprobe which allows the accessing to the electrochemical behavior of regions with micrometric dimensions. The prototype will be used to characterize the influence of the laser micro welding on Ti-35Nb-xSn and Ni-Ti alloys, both characterized by shape memory effect superelasticity and application as biomaterial. Welding processes are recognized by compromising corrosion resistance. Welding usually changes the structure and local composition, causing corrosion around the weld bead and the heat affected zone. The laser micro welding results in a CS width less than 0.5 mm and a HAZ with half of this dimension, which makes difficult to differentiate the effects of welding on these two regions and mainly, the galvanic couple between them. The corrosion resistance parameters obtained by the DC and AC techniques will be compared with the microstructure, compositional changes, presence of phases and with the mechanical properties in the region of the micro welding. (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)

JULIANE RIBEIRO DA CRUZ; MILTON SÉRGIO FERNANDES DE LIMA; RODNEI BERTAZZOLI. Corrosion Susceptibility and Functionally Graded Properties of Ti-35Nb-4Sn Alloy Processed by Laser Remelting. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 23, n. 1, 2020-05-11. (16/10637-4)

DA CRUZ, JULIANE RIBEIRO; BERTAZZOLI, RODNEI. Characterization of Corrosion Within Friction Stir Weld Zones of an API X-70 Steel Using a Novel Microcell Setup. Journal of Materials Engineering and Performance, v. 29, n. 1, JAN 2020. (16/10637-4)