In-situ synthesis of Ti-Fe-based alloys prepared by the combination of mechanical alloying and laser melting deposition: Microstructure and corrosion resistance

• Published in: Journal of alloys and compounds Vol. 768; pp. 697 - 706
• Main Authors: Zhou, Shengfeng, Xu, Yongbo, Liao, Bangquan, Sun, Yajuan, Dai, Xiaoqin, Pan, Hongbo
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 05.11.2018; Elsevier BV
• Subjects: Alloying elements; Copper; Corrosion resistance; Corrosion resistant alloys; Deposition; Ferrous alloys; Intermetallic compounds; Intermetallics; Iron; Iron compounds; Laser beam melting; Laser melting deposition; Mechanical alloying; Microstructure; Solid solutions; Ti-Fe alloys; Titanium alloys; Titanium base alloys; Titanium compounds; Titanium dioxide; Corrosion resistance; Intermetallics; Laser melting deposition; Microstructure; Mechanical alloying; Ti-Fe alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2018.07.276

The Ti-Fe-based alloys were in-situ synthesized by the combination of mechanical alloying and laser melting deposition (LMD). The microstructure evolution and corrosion behaviors of Ti50Fe50 and Ti40Fe50Cu10 alloys were also investigated. The results show that mechanical alloying of Ti and Fe elemental mixtures induces the formation of intermetallic TiFe, Ti-rich amorphous phase and α-Fe(Ti) solid solution and that the addition of Cu can refine the size of nanocrystalline TiFe phase. Although LMD-produced Ti50Fe50 and Ti40Fe50Cu10 alloys are composed of TiO dendrites and α-Fe/TiFe2 (hexagonal MgZn2-type Laves structure) eutectic, the addition of Cu can refine the TiO dendrites, induce the formation of TiO2 particles and dissolve into the TiFe2 phase in the Ti40Fe50Cu10 alloy. As a result, the LMD-produced Ti40Fe50Cu10 alloy exhibits higher corrosion resistance than the LMD-produced Ti50Fe50 alloy. [Display omitted] •TiO/Ti-Fe alloys are synthesized by mechanical alloying and laser melting deposition.•Mechanical alloying of Ti and Fe powders results in nanocrystalline TiFe and α-Fe(Ti).•Addition of Cu can refine the size of nanocrystalline TiFe phase.•LMD-produced Ti50Fe50 and Ti40Fe50Cu10 alloys consist of TiO and α-Fe/TiFe2 eutectic.•Addition of Cu can refine the microstructure and enhance the corrosion resistance.