Microstructure and properties of Ti-Fe-Y alloy fabricated by laser-aided direct metal deposition

Cunshan Wang; Liying Han

doi:10.1117/1.OE.57.4.041410

16 March 2018 Microstructure and properties of Ti-Fe-Y alloy fabricated by laser-aided direct metal deposition

Cunshan Wang, Liying Han

Author Affiliations +

Optical Engineering, Vol. 57, Issue 4, 041410 (March 2018). https://doi.org/10.1117/1.OE.57.4.041410

Abstract

Ti-Fe-Y alloys were designed using a “cluster-plus-glue-atom” model and then were prepared by laser-aided direct metal deposition (LDMD) on a pure titanium substrate. The influence of the Y addition on the microstructure and properties of the alloys were investigated. The results show that the alloys are composed of β-Ti solid solution and FeTi compound. The addition of Y not only suppresses the formation of Ti₄Fe₂O oxide but also increases the supercooling degree of the melt, leading to the grain refinement and the increase in the solid solution of the β-Ti. Meanwhile, the microstructure changes sequentially from eutectic to hypereutectic to hypoeutectic with the increasing of the Y addition. The strengest Ti-Fe-Y alloy has a dispersed eutectic structure and exhibits a good combination of mechanical, tribological, and forming properties, which is superior to that obtained for the binary Ti_70.6Fe_29.4 eutectic alloy. This makes the alloy a promising candidate as a LDMD material.

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Cunshan Wang and Liying Han "Microstructure and properties of Ti-Fe-Y alloy fabricated by laser-aided direct metal deposition," Optical Engineering 57(4), 041410 (16 March 2018). https://doi.org/10.1117/1.OE.57.4.041410

Received: 29 September 2017; Accepted: 22 February 2018; Published: 16 March 2018

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