A new insight into high-strength Ti(62)Nb(12.2)Fe(13.6)Co(6.4)Al(5.8) alloys with bimodal microstructure fabricated by semi-solid sintering

It is well known that semi-solid forming could only obtain coarse-grained microstructure in a few alloy systems with a low melting point, such as aluminum and magnesium alloys. This work presents that semi-solid forming could also produce novel bimodal microstructure composed of nanostructured matri...

Descripción completa

Detalles Bibliográficos
Autores principales: Liu, L. H., Yang, C., Kang, L. M., Qu, S. G., Li, X. Q., Zhang, W. W., Chen, W. P., Li, Y. Y., Li, P. J., Zhang, L. C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4814828/
https://www.ncbi.nlm.nih.gov/pubmed/27029858
http://dx.doi.org/10.1038/srep23467
Descripción
Sumario:It is well known that semi-solid forming could only obtain coarse-grained microstructure in a few alloy systems with a low melting point, such as aluminum and magnesium alloys. This work presents that semi-solid forming could also produce novel bimodal microstructure composed of nanostructured matrix and micro-sized (CoFe)Ti(2) twins in a titanium alloy, Ti(62)Nb(12.2)Fe(13.6)Co(6.4)Al(5.8). The semi-solid sintering induced by eutectic transformation to form a bimodal microstructure in Ti(62)Nb(12.2)Fe(13.6)Co(6.4)Al(5.8) alloy is a fundamentally different approach from other known methods. The fabricated alloy exhibits high yield strength of 1790 MPa and plastic strain of 15.5%. The novel idea provides a new insight into obtaining nano-grain or bimodal microstructure in alloy systems with high melting point by semi-solid forming and into fabricating high-performance metallic alloys in structural applications.

Ejemplares similares