Effects of heat treatment on microstructure and mechanical behaviour of additive manufactured porous Ti6Al4V

Effects of heat treatment on microstructure and mechanical behaviour of additive manufactured porous Ti6Al4V

Ahmadi, S.M. (TU Delft (OLD) MSE-5; TU Delft Biomaterials & Tissue Biomechanics)
Ashok Kumar Jain, R. K.
Zadpoor, A.A. (TU Delft Biomaterials & Tissue Biomechanics)
Ayas, C. (TU Delft Computational Design and Mechanics)
Popovich, V. (TU Delft (OLD) MSE-5)

2018

Titanium and its alloys such as Ti6Al4V play a major role in the medical industry as bone implants. Nowadays, by the aid of additive manufacturing (AM), it is possible to manufacture porous complex structures which mimic human bone. However, AM parts are near net shape and post processing may be needed to improve their mechanical properties. For instance, AM Ti6Al4V samples may be brittle and incapable of withstanding dynamic mechanical loads due to their martensitic microstructure. The aim of this study was to apply two different heat treatment regimes (below and above β-transus) to investigate their effects on the microstructure and mechanical properties of porous Ti6Al4V specimens. After heat treatment, fine acicular ′ martensitic microstructure was transformed to a mixture of and β phases. The ductility of the heat-treated specimens, as well as some mechanical properties such as hardness, plateau stress, and first maximum stress changed while the density and elastic gradient of the porous structure remained unchanged.

http://resolver.tudelft.nl/uuid:efe8e96e-bcd4-4435-8fa2-36f8676a33e2

https://doi.org/10.1088/1757-899X/293/1/012009

1757-8981

IOP Conference Series: Materials Science and Engineering, 293 (1)

Institutional Repository

journal article

© 2018 S.M. Ahmadi, R. K. Ashok Kumar Jain, A.A. Zadpoor, C. Ayas, V. Popovich