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Effect of the Metallic Aging on the Microstructure and Mechanical Properties of Titanium Alloy

Published online by Cambridge University Press:  04 September 2017

T.J. Sánchez-Rosas*
Affiliation:
Universidad Autónoma Metropolitana Unidad -Azcapotzalco. Av. San Pablo No. 180. Col. Reynosa Tamaulipas México Distrito Federal, C.P. 02200.
J.D. Muñoz-Andrade
Affiliation:
Universidad Autónoma Metropolitana Unidad -Azcapotzalco. Av. San Pablo No. 180. Col. Reynosa Tamaulipas México Distrito Federal, C.P. 02200.
M. Aguilar-Sánchez
Affiliation:
Universidad Autónoma Metropolitana Unidad -Azcapotzalco. Av. San Pablo No. 180. Col. Reynosa Tamaulipas México Distrito Federal, C.P. 02200.
B. Vargas-Arista
Affiliation:
Instituto Tecnológico de Tlalnepantla. División de Estudios de Posgrado e Investigación. Av. Instituto Tecnológico s/n. Col. La comunidad. Tlalnepantla de Baz Estado de México, C.P. 54070.
E. Garfias-García
Affiliation:
Universidad Autónoma Metropolitana Unidad -Azcapotzalco. Av. San Pablo No. 180. Col. Reynosa Tamaulipas México Distrito Federal, C.P. 02200.
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Abstract

Different aging heat treatments were performed in a Titanium alloy using as aging media metallic baths in comparison to typical furnace aging. As a first step, a Duplex Aging (DA) consisted of solubilization followed by quenching to room temperature after aging heat treatment in different metallic baths (Zn, Sn and Bi). A second procedure was Alternative Aging (AA) which consisted of solubilization and direct aging inside three different aforementioned baths. Microstructural aging variations begins at half hour until 30 h at 550°C inside metallic bath of Zn, Sn or Bi. Both kinds of aging promoted a microstructural variation and so on microhardness values. Microstructural analysis by Optical Microscopy showed a structural refinement after AA treatment. The highest hardness value of 375 HVN was achieved in Alternative Aging with Zn bath, which was found to be dependent on laminar α phase refining. Moreover, after AA treatment for 0.5, 1, 2, 3, 4, 10 and 30 h at 550°C in the metallic bath of Zn and Sn, the results indicated similar hardness values in different times, resulting in the fastest kinetic for Sn metallic bath at 2 h compared to that 4 h in Zn metallic bath. The observed increase in micro-hardness is not very attractive, it is recommended to use large aging times in order to stabilize final spacing of microstructural features in AA treatment.

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Articles
Copyright
Copyright © Materials Research Society 2017 

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