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Article

Evolution of the Microstructure and Mechanical Properties of a Ti35Nb2Sn Alloy Post-Processed by Hot Isostatic Pressing for Biomedical Applications

DIMM ETSII, Universitat Politècnica de València, Camino de Vera s/n, 5E Building, 46022 Valencia, Spain
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Academic Editor: Maciej Motyka
Metals 2021, 11(7), 1027; https://doi.org/10.3390/met11071027
Received: 8 June 2021 / Revised: 21 June 2021 / Accepted: 23 June 2021 / Published: 25 June 2021
(This article belongs to the Special Issue Titanium Alloys and Titanium-Based Matrix Composites)
The HIP post-processing step is required for developing next generation of advanced powder metallurgy titanium alloys for orthopedic and dental applications. The influence of the hot isostatic pressing (HIP) post-processing step on structural and phase changes, porosity healing, and mechanical strength in a powder metallurgy Ti35Nb2Sn alloy was studied. Powders were pressed at room temperature at 750 MPa, and then sintered at 1350 °C in a vacuum for 3 h. The standard HIP process at 1200 °C and 150 MPa for 3 h was performed to study its effect on a Ti35Nb2Sn powder metallurgy alloy. The influence of the HIP process and cold rate on the density, microstructure, quantity of interstitial elements, mechanical strength, and Young’s modulus was investigated. HIP post-processing for 2 h at 1200 °C and 150 MPa led to greater porosity reduction and a marked retention of the β phase at room temperature. The slow cooling rate during the HIP process affected phase stability, with a large amount of α”-phase precipitate, which decreased the titanium alloy’s yield strength. View Full-Text
Keywords: hot isostatic pressing; β-Type titanium alloy; biomaterial; phase transformation; powder metallurgy hot isostatic pressing; β-Type titanium alloy; biomaterial; phase transformation; powder metallurgy
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MDPI and ACS Style

Lario, J.; Vicente, Á.; Amigó, V. Evolution of the Microstructure and Mechanical Properties of a Ti35Nb2Sn Alloy Post-Processed by Hot Isostatic Pressing for Biomedical Applications. Metals 2021, 11, 1027. https://doi.org/10.3390/met11071027

AMA Style

Lario J, Vicente Á, Amigó V. Evolution of the Microstructure and Mechanical Properties of a Ti35Nb2Sn Alloy Post-Processed by Hot Isostatic Pressing for Biomedical Applications. Metals. 2021; 11(7):1027. https://doi.org/10.3390/met11071027

Chicago/Turabian Style

Lario, Joan, Ángel Vicente, and Vicente Amigó. 2021. "Evolution of the Microstructure and Mechanical Properties of a Ti35Nb2Sn Alloy Post-Processed by Hot Isostatic Pressing for Biomedical Applications" Metals 11, no. 7: 1027. https://doi.org/10.3390/met11071027

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