28
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Desarrollo de intermetálicos TiAl mediante técnicas pulvimetalúrgicas convencionales y de alta densificación Translated title: TiAl Intermetallic Development by Using Conventional and High Densification Powder Metallurgy Techniques

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Cada día hay más demanda de materiales que ofrezcan altas temperaturas de servicio y bajo peso; pero su fabricación es compleja y costosa, particularmente la de las superaleaciones de base cobalto y la de las aleaciones de titanio; dentro de estas últimas, los intermetálicos TiAl y Ti3Al son ampliamente reconocidos para satisfacer las necesidades actuales; sin embargo, la colada y forja de estos intermetálicos, que tienen una mejor resistencia frente a la oxidación a elevadas temperaturas, resulta muy compleja, y es por lo que, partiendo de polvo prealeado, se busca obtener productos prácticamente acabados con un coste razonable. El presente trabajo analiza la influencia de las variables de procesado de polvos intermetálicos Ti48Al2Cr2Nb, mediante técnicas pulvimetalúrgicas convencionales y Spark Plasma Sintering (SPS), en su microestructura y en sus propiedades mecánicas. Se obtienen muestras a diferentes temperaturas de sinterización a partir de polvos obtenidos por atomización. La influencia en las propiedades mecánicas se observa mediante su microdureza y resistencia a la compresión, realizándose un seguimiento de la microestructura mediante microscopía óptica y electrónica de barrido. Las condiciones de procesado muestran un gran efecto en la microestructura obtenida, fundamentalmente en la formación de la fase a2, que acompaña las propiedades mecánicas finales. Sin embargo, es con el proceso de máxima densificación donde se obtienen las propiedades adecuadas, lo cual hace pensar que es una alternativa clara a los procesos actuales de colada y deformación plástica.

          Translated abstract

          There is a growing demand for materials that offer services at high temperatures and low weight. However, these materials' manufacture is complex and expensive, particularly the cobalt-based superalloys and the titanium alloys. Within the latter, the Ti3Al and the TiAl intermetallics are widely recognized to meet the current needs. However, due that these intermetallic casting and forging process, which have a better oxidation resistance at elevated temperatures, it becomes very complex and therefore starting from a pre-alloyed powder, can be tried to obtain practically some finished products at a reasonable cost. This paper analyzes the Ti48Al2Cr2Nb intermetallic powder processing variables' influence, by the conventional powder metallurgy techniques and the Spark Plasma Sintering, (SPS) in their microstructure and mechanical properties. Some samples are obtained at different sintering temperatures from the powders obtained by atomization. The influence on the mechanical properties is observed by its micro-hardness and compression resistance, and their microstructure is analyzed by an optical and scanning electron microscopy. The processing conditions show a large effect on the obtained microstructure, mainly in the α2 phase formation, which accompanies the final mechanical properties. However, is in the maximum densification process, where the appropriate properties are obtained, which suggests that they are a clear alternative to the casting and plastic deformation's current processes.

          Related collections

          Most cited references27

          • Record: found
          • Abstract: not found
          • Article: not found

          Electron beam melting of Ti–48Al–2Cr–2Nb alloy: Microstructure and mechanical properties investigation

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            High-temperature structural intermetallics

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Effect of spark plasma sintering temperature on microstructure and mechanical properties of an ultrafine grained TiAl intermetallic alloy

                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                rfing
                Revista Facultad de Ingeniería
                Rev. Fac. ing.
                Universidad Pedagógica y Tecnológica de Colombia (Tunja, Boyacá, Colombia )
                0121-1129
                January 2014
                : 23
                : 36
                : 25-38
                Affiliations
                [01] Valencia orgnameUniversidad Politécnica de Valencia España vamigo@ 123456mcm.upv.es
                [02] Valencia orgnameUniversidad Politécnica de Valencia España anamma@ 123456posgrado.upv.es
                [03] Valencia orgnameUniversidad Politécnica de Valencia España monharod@ 123456upvnet.upv.es
                Article
                S0121-11292014000100003
                a691fa62-d910-4580-b43a-00bcaa6ebb47

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 22 December 2013
                : 24 January 2014
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 21, Pages: 14
                Product

                SciELO Colombia

                Categories
                Editorial

                Intermetálico TiAl,Pulvimetalurgia,Técnica SPS,Sinterización,TiAl Intermetallic,Powder Metallurgy,Spark Plasma Sintering,SPS technique,Mechanical properties

                Comments

                Comment on this article