| Grant number: | 08/04268-0 |
| Support Opportunities: | Regular Research Grants |
| Start date: | August 01, 2008 |
| End date: | August 31, 2010 |
| Field of knowledge: | Engineering - Materials and Metallurgical Engineering - Transformation Metallurgy |
| Principal Investigator: | Vinicius André Rodrigues Henriques |
| Grantee: | Vinicius André Rodrigues Henriques |
| Host Institution: | Instituto de Aeronáutica e Espaço (IAE). Departamento de Ciência e Tecnologia Aeroespacial (DCTA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil |
Abstract
The titanium and its alloys are used in applications that demand high performance. Its main applications occur in the aerospace, chemical, naval industries and more recently, in sportive equipment and orthopedic implants. The titanium alloys production by powder metallurgy is an advantageous alternative for allowing the parts production with complex geometries to a relatively low cost. Despite that, is verified that the introduction of interstitial elements (oxygen, nitrogen and carbon) during the processing of these alloys, though can provide an increase in hardness and mechanical resistance, frequently is related to the reduction of ductility and fragility. The objective of the present project is to investigate the influence of the interstitial elements in the titanium alloys production by powder metallurgy (P/M), using techniques of characterization and experimental planning, aiming the process optimization. This study is based on the obtainment of Ti-6Al-4V e Ti-13Nb-13Zr alloys, with the effective control of the interstitial elements contents, investigating its influence in each stage of processing and in the behavior and final properties of the alloys. A priority in any process of titanium alloys production, that difficult the advance of the research in this area, is the acquisition of an equipment capable to carry effectives analyses of these contents by means of infra-red ray absorption and thermal conductivity techniques Thus, this study will allow to understand the influence of the interstitial elements in the Ti alloys and to establish limits of these elements until the final stage of processing, aiming the reduction of the costs and the guarantee of the alloys quality. The Metallurgical Process Group (GPM) of the Materials Division (AMR/IAE/CTA) has patents of the process (INPI) and it is pioneer and leader of the Brazilian research in this area, coordinating projects financed by FAPESP. A precise quantification of the interstitial elements also will allow the verification of the conformity of the produced alloys in agreement with the limits specified for norms, for applications in aerospace area and biomaterials. Moreover, the establishment of correlations between interstitial elements contents and the final performance of the alloys will generate knowledge on the effect of these elements in the behavior of the alloys in service. The demand for this type of assay was verified and is considered with high priority for the research development, not only in CTA, as well as in other institutions of the Vale do Paraíba (SP); region that concentrates the most important technological centers and aerospace industries of the country. This way, the development of this work may include the AMR in the laboratorial nets, with implanted system of management, extending the possibility of these assays in so important areas as the aerospace and biomaterials. (AU)
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