Advanced search
Start date
Betweenand

Powder metallurgy processing of titanium aluminide alloys

Grant number: 18/04564-0
Support type:Regular Research Grants
Duration: December 01, 2018 - August 31, 2021
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal researcher:Juliano Soyama
Grantee:Juliano Soyama
Home Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Assoc. researchers:João Batista Fogagnolo

Abstract

High temperature materials are present in many common applications from automobiles and airplanes to heavy machinery found in petrochemical power plants and energy production. There is a wide range of materials that can be applied under combined conditions of mechanical loading and high temperatures, which include Ni-based superalloys, high temperature steels, molybdenum, niobium, cobalt and alloys, as well as intermetallics such as titanium aluminides. A great advantage of titanium aluminides over other competing alloys is their low density and thus high specific strength. However, processing of these intermetallics by conventional techniques is very challenging and typically expensive. Therefore alternative fabrication techniques such as powder metallurgy can offer several advantages in regard to processing. Powder metallurgy is able to provide fine and homogeneous microstructures that are segregation free. Additionally, a near-net shape condition can be achieved, which greatly decreases production costs. Nonetheless, powder metallurgy processing of titanium aluminides is not trivial and requires modifications to facilitate consolidation and sintering. One strategy is to add alloying elements that decrease sintering temperatures, e.g. Ni, Co, Fe, Zr, etc. In this case, a compromise between the beneficial effects in the sintering behavior and the formation of deleterious phases must be achieved. Furthermore, considering that quaternary or even more complex compositions are possible, the synergetic effects of alloying elements are difficult to predict without experimental work. Consequently, the investigation of alloying elements and the sintering behavior is mandatory for the development of powder metallurgy processed titanium aluminides. The objective of this research project is thus focused on the investigation of alloying elements that can aid sintering in the Ti-Al-Nb system using both conventional sintering and additive manufacturing technique (selective laser melting). (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
Articles published in other media outlets (0 total):
More itemsLess items
VEICULO: TITULO (DATA)
VEICULO: TITULO (DATA)

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)
SOYAMA, JULIANO; LIMBERG, WOLFGANG; EBEL, THOMAS; PYCZAK, FLORIAN. Sintering and Creep Resistance of Powder-Metallurgy-Processed Ti-(43-47)Al-5Nb-0.2B-0.2C. ADVANCED ENGINEERING MATERIALS, JUN 2020. Web of Science Citations: 0.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.