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http://dx.doi.org/10.4150/KPMI.2022.29.4.325

Effect of Iron Content on Microstructure and Mechanical Properties of Ti-Mo-Fe P/M Alloys  

Hwang, HyoWoon (Department of Materials Science and Metallurgical Engineering, Sunchon National University)
Lee, YongJae (Department of Materials Science and Metallurgical Engineering, Sunchon National University)
Park, JiHwan (Material Technical Innovation Group (MTIG))
Lee, Dong-Geun (Department of Materials Science and Metallurgical Engineering, Sunchon National University)
Publication Information
Journal of Powder Materials / v.29, no.4, 2022 , pp. 325-331 More about this Journal
Abstract
Beta-titanium alloys are used in many industries due to their increased elongation resulting from their BCC structure and low modulus of elasticity. However, there are many limitations to their use due to the high cost of beta-stabilizer elements. In this study, biocompatible Ti-Mo-Fe beta titanium alloys are designed by replacing costly beta-stabilizer elements (e.g., Nb, Zr, or Ta) with inexpensive Mo and Fe elements. Additionally, Ti-Mo-Fe alloys designed with different Fe contents are fabricated using powder metallurgy. Fe is a strong, biocompatible beta-stabilizer element and a low-cost alloying element. The mechanical properties of the Ti-Mo-Fe metastable beta titanium alloys are analyzed in relation to the microstructural changes. When the Fe content increases, the tensile strength and elongation decrease due to brittle fracture despite a decreasing pore fraction. It is confirmed that the hardness and tensile strength of Ti-5Mo-2Fe P/M improve to more than 360 Hv and 900 MPa, respectively.
Keywords
Ti-Mo-Fe alloy; beta titanium; low-cost; high strength;
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