Mechanical behaviour of pressed and sintered titanium alloys obtained from prealloyed and blended elemental powders.

Autor: Bolzoni L; Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química Universidad Carlos III de Madrid Avda. de la Universidad, 30, 28911 Leganés (Madrid), Spain. lbolzoni@ing.uc3m.es, Esteban PG, Ruiz-Navas EM, Gordo E
Jazyk: angličtina
Zdroj: Journal of the mechanical behavior of biomedical materials [J Mech Behav Biomed Mater] 2012 Oct; Vol. 14, pp. 29-38. Date of Electronic Publication: 2012 Jun 01.
DOI: 10.1016/j.jmbbm.2012.05.013
Abstrakt: The applicability of irregular prealloyed Ti-6Al-4V powder for the fabrication of titanium products by pressing and sintering and its employment as a master alloy to obtain the Ti-3Al-2.5V alloy was studied. To this end, the starting powders were characterised by dilatometry, differential thermal analysis and XRD. Green samples were obtained by cold uniaxial pressing, and the evolution of the microstructure over the sintering temperature range 900-1400°C was studied. The variation of the final density and mechanical properties with the sintering temperature was considered. Based on the study carried out, it can be stated that more reliable powders are needed to open the titanium market to new applications. A relative density of 95% and diverse microstructural features and mechanical properties equivalent to those of biomedical devices can be obtained by the pressing and sintering route.
(Copyright © 2012 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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