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Study of a nanostructured Cr/CrN coating and dwell effect influence on the fatigue behavior of Ti-6Al-4V alloy at a temperature of 350°C

Grant number: 19/02125-1
Support Opportunities:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): August 01, 2019
Effective date (End): February 29, 2024
Field of knowledge:Engineering - Aerospace Engineering
Principal Investigator:Herman Jacobus Cornelis Voorwald
Grantee:Martin Ferreira Fernandes
Host Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil
Associated scholarship(s):19/25360-6 - Study of a nanostructured Cr/CrN coating and dwell effect influence on the fatigue behavior of Ti-6Al-4V alloy at a temperature of 350°C, BE.EP.DD

Abstract

The Ti-6Al-4V titanium alloy is applied in the aeronautical industry in fan blades and disks of the first stage of gas turbine engines in the temperature range from 250 to 450°C. Although the alloy has high specific mechanical strength and good stability at temperatures up to 600°C, the material has a high friction coefficient, low wear resistance, and reduced high-temperature oxidation resistance. CrN is a hard coating with good wear, corrosion, and oxidation resistance, while metallic Cr has ductile behavior, which hinders the propagation of cracks nucleated at the brittle layers of CrN in Cr/CrN based coatings. In the present work, the fatigue behavior of Ti-6Al-4V with lamellar microstructure and a nanostructured Cr/CrN multilayer coating will be evaluated through fatigue and the combination of fatigue and creep loadings (dwell effect) tests at room temperature and in the application temperature range. The mechanisms involved in the fatigue behavior of the alloy under operating conditions will be studied under the perspective of superficial changes provided by the presence of a multilayer Cr/CrN coating, alloy application temperature influence on time-dependent phenomena, and the combination of dynamic and constant loadings, based on microstructural analysis, oxidation tests, residual stress measurements, crack propagation tests, strain analysis, and fracture surface analysis. The fatigue cracks propagation stages will be evaluated through the crack propagation rate as a function of the variation of the stress intensity factor. It is expected that the treatment will provide superficial changes that improve the fatigue behavior of the alloy in operating conditions, aiming the application of the surface treatment in the first stage of jet engines components and the expansion of the possibilities of the alloy application in the aeronautical sector. (AU)

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Scientific publications (6)
(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)
CORNELIS VOORWALD, HERMAN JACOBUS; DOS SANTOS VIEIRA, LUIZ FABIO; DE OLIVEIRA VELLOSO, VERONICA MARA; FERNANDES, MARTIN FERREIRA; HILARIO CIOFFI, MARIA ODILA. nvestigation of HVOF-sprayed WC- and NiCr-based coatings to improve corrosion and wear performance of high-strength stee. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 44, n. 3, . (19/02125-1)
MARCELINO DOS SANTOS, JEFFERSON RODRIGO; FERNANDES, MARTIN FERREIRA; VELLOSO, VERONICA MARA DE OLIVEIRA; VOORWALD, HERMAN JACOBUS CORNELIS. Fatigue Analysis of Threaded Components with Cd and Zn-Ni Anticorrosive Coatings. METALS, v. 11, n. 9, . (17/05619-0, 19/02125-1)
FERREIRA FERNANDES, MARTIN; DOS SANTOS, JEFFERSON RODRIGO MARCELINO; DE OLIVEIRA VELLOSO, VERONICA MARA; VOORWALD, HERMAN JACOBUS CORNELIS. AISI 4140 Steel Fatigue Performance: Cd Replacement by Electroplated Zn-Ni Alloy Coating. Journal of Materials Engineering and Performance, v. 29, n. 3, SI, . (17/05619-0, 19/02125-1)
CAMPOS DE BOMFIM, ANNE SHAYENE; CORNELIS VOORWALD, HERMAN JACOBUS; DE CARVALHO BENINI, KELLY CRISTINA COELHO; DE OLIVEIRA, DANIEL MAGALHAES; FERNANDES, MARTIN FERREIRA; HILARIO CIOFFI, MARIA ODILA. Sustainable application of recycled espresso coffee capsules: Natural composite development for a home composter product. JOURNAL OF CLEANER PRODUCTION, v. 297, p. 13-pg., . (19/02607-6, 19/02125-1)
BASTOS, YARA COELHO; FERNANDES, MARTIN FERREIRA; VELLOSO, VERONICA MARA DE OLIVEIRA; MINTO, THIAGO ALEXANDRE; VOORWALD, HERMAN JACOBUS CORNELIS. Plasma immersion ion implantation and shot peening influence on the fatigue strength of AA 7050-T7451 aluminum alloy. ENGINEERING RESEARCH EXPRESS, v. 2, n. 1, p. 9-pg., . (15/00331-2, 19/02125-1)
FERREIRA FERNANDES, MARTIN; DOS SANTOS, JEFFERSON RODRIGO MARCELINO; DE OLIVEIRA VELLOSO, VERONICA MARA; VOORWALD, HERMAN JACOBUS CORNELIS. AISI 4140 Steel Fatigue Performance: Cd Replacement by Electroplated Zn-Ni Alloy Coating. Journal of Materials Engineering and Performance, v. 29, n. 3, p. 12-pg., . (17/05619-0, 19/02125-1)

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