Thixoforming of titanium alloys: application to Ti-Cu, Ti-Fe and Ti-Co systems

• Grant number: 13/24786-3
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): June 01, 2014
• Effective date (End): August 31, 2018
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal researcher: Rubens Caram Junior
• Grantee: Kaio Niitsu Campo
• Home Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated scholarship(s): 17/07040-9 - In situ microstructure observations of semisolid Ti alloys using laser-scanning confocal microscopy, BE.EP.DR

Abstract

The use of titanium and its alloys as structural materials has grown steadily in the last few years, which is due to the interesting combination of mechanical, chemical, physical and biomedical properties of this metal. The most intense increase in the industrial consumption of titanium is strongly limited by its cost, which is related not only to the difficulties of its refining, but mainly to its high processing cost. The processing of titanium in order to obtain specific geometries is a high complexity task, which increases the cost of the final product. A very innovative approach to process titanium alloys is the use of thixoforming techniques. The goal of this research project is to examine the thixoformability of alloys in the Ti-Cu, Ti-Fe and Ti-Co systems. This objective will be achieved through: (a) assessment of the Ti-Cu, Ti-Fe and Ti-Co systems and selection of compositions with potential for thixoforming, (b) production of selected alloys and experimental evaluation of working temperatures, (c) morphological evaluation in semisolid state, (d) evaluation of the viscous behavior and finally (e) evaluation of the mechanical behavior of the thixoformed material. The samples will be produced by arc melting and thixoprocessed in an equipment comprising a stainless steel chamber which operates under inert atmosphere. Inside this chamber, samples will be heated by using electromagnetic induction. The characterization of the samples will involve thermal analysis techniques, X-ray diffraction, optical and electron microscopy and mechanical testing. At the end of this research it will be possible to diagnose the feasibility of thixoforming titanium alloys. (AU)

Scientific publications

(4)

(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)

CAMPO, KAIO NIITSU; DE FREITAS, CABO CHAUSSE; MOON, SUK-CHUN; DIPPENAAR, RIAN; CARAM, RUBENS. In-situ microstructural observation of Ti-Cu alloys for semi-solid processing. MATERIALS CHARACTERIZATION, v. 145, p. 10-19, NOV 2018. (13/24786-3, 17/07040-9)

DE FREITAS, CAIO CHAUSSE; CAMPO, KAIO NIITSU; CARAM, RUBENS. Thixoforming of titanium: The microstructure and processability of semisolid Ti-Cu-Fe alloys. VACUUM, v. 180, OCT 2020. (13/24786-3)

CAMPO, K. N.; LOPES, E. S. N.; PARRISH, C. J.; CARAM, R.. Rapid quenching of semisolid Ti-Cu alloys: Insights into globular microstructure formation and coarsening. ACTA MATERIALIA, v. 139, p. 86-95, OCT 15 2017. (13/24786-3)

CAMPO, KAIO NIITSU; DE FREITAS, CAIO CHAUSSE; DE LIMA, DALTON DANIEL; CARAM, RUBENS. Observations on the compression properties of semisolid Ti-Cu alloys. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, v. 9, n. 6, p. 15802-15810, NOV-DEC 2020. (13/24786-3)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CAMPO, Kaio Niitsu. Thixoforming of titanium alloys: application to the Ti-Cu, Ti-Fe and Ti-Co systems. 2018. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Mecânica Campinas, SP.