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Article

Powder Metallurgy Processing and Mechanical Properties of Controlled Ti-24Nb-4Zr-8Sn Heterogeneous Microstructures

1
Université Sorbonne Paris Nord, Laboratoire de Sciences des Procédés et des Matériaux, CNRS, UPR 3407, 93430 Villetaneuse, France
2
PSL University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005 Paris, France
3
Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
4
Université Paris Est Créteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, 94320 Thiais, France
*
Author to whom correspondence should be addressed.
Metals 2020, 10(12), 1626; https://doi.org/10.3390/met10121626
Submission received: 7 November 2020 / Revised: 27 November 2020 / Accepted: 1 December 2020 / Published: 4 December 2020

Abstract

This paper gives some insights into the fabrication process of a heterogeneous structured β-metastable type Ti-24Nb-4Zr-8Sn alloy, and the associated mechanical properties optimization of this biocompatible and low elastic modulus material. The powder metallurgy processing route includes both low energy mechanical ball milling (BM) of spherical and pre-alloyed powder particles and their densification by Spark Plasma Sintering (SPS). It results in a heterogeneous microstructure which is composed of a homogeneous 3D network of β coarse grain regions called “core” and α/β dual phase ultra-fine grain regions called “shell.” However, it is possible to significantly modify the microstructural features of the alloy—including α phase and shell volume fractions—by playing with the main fabrication parameters. A focus on the role of the ball milling time is first presented and discussed. Then, the mechanical behavior via shear tests performed on selected microstructures is described and discussed in relation to the microstructure and the probable underlying deformation mechanism(s).
Keywords: heterogeneous microstructure; titanium alloy; powder metallurgy; mechanical properties heterogeneous microstructure; titanium alloy; powder metallurgy; mechanical properties

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MDPI and ACS Style

Fer, B.; Tingaud, D.; Hocini, A.; Hao, Y.; Leroy, E.; Prima, F.; Dirras, G. Powder Metallurgy Processing and Mechanical Properties of Controlled Ti-24Nb-4Zr-8Sn Heterogeneous Microstructures. Metals 2020, 10, 1626. https://doi.org/10.3390/met10121626

AMA Style

Fer B, Tingaud D, Hocini A, Hao Y, Leroy E, Prima F, Dirras G. Powder Metallurgy Processing and Mechanical Properties of Controlled Ti-24Nb-4Zr-8Sn Heterogeneous Microstructures. Metals. 2020; 10(12):1626. https://doi.org/10.3390/met10121626

Chicago/Turabian Style

Fer, Benoît, David Tingaud, Azziz Hocini, Yulin Hao, Eric Leroy, Frédéric Prima, and Guy Dirras. 2020. "Powder Metallurgy Processing and Mechanical Properties of Controlled Ti-24Nb-4Zr-8Sn Heterogeneous Microstructures" Metals 10, no. 12: 1626. https://doi.org/10.3390/met10121626

APA Style

Fer, B., Tingaud, D., Hocini, A., Hao, Y., Leroy, E., Prima, F., & Dirras, G. (2020). Powder Metallurgy Processing and Mechanical Properties of Controlled Ti-24Nb-4Zr-8Sn Heterogeneous Microstructures. Metals, 10(12), 1626. https://doi.org/10.3390/met10121626

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