Texture evolution, phase transformation and mechanical properties of selective laser melted Ti-13Nb-13Zr

Journal Article · Thu Nov 15 04:00:00 EST 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2018.08.053· OSTI ID:22805859

Zhou, Libo; Yuan, Tiechui ^[1]; Tang, Jianzhong ^[2]; Li, Lanbo; Mei, Fangsheng; Li, Ruidi ^[1]

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1. Science and Technology on High Strength Structural Materials Laboratory, State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083 (China)
2. Zhuzhou Printing Additive Manufacturing Co. LTD, Zhuzhou 412000 (China)

Highlights: • The crystallographic texture orientation of Ti-13Nb-13Zr alloy was tailored. • The evolution of the volume fraction of α′ phase was investigated. • The phase transformation was discussed using TEM/HRTEM observations. • The elastic moduli of α′ and β phases have been calculated. - Abstract: The crystallographic texture and phase composition associated with the performance of materials have been well documented, but there are very few studies on their controlling strategies. In this work, the crystallographic texture orientation and phase transformation of Ti-13Nb-13Zr alloy were tailored for the first time by selective laser melting with different scanning strategies. <011> crystal orientation along the building direction is preferred in sample A (unidirectional scanning along one axis), while <001> is preferred in sample B (unidirectional scanning with a 90° rotation in each layer). The evolution of the volume fraction of α′ phase was investigated using X-ray photoelectron spectroscopy. The results indicated that sample B has the highest content of α′ phasein sample B. The hardness and wear resistance have been studied through nanoindentation and the results turn out that all samples show higher hardness and better wear resistance (hin sample B. The hardness and wear resistance have been studied through nanoindentation and the results turn out that all samples show higher hardness and better wear resistance (higher H{sub d}/E{sub r} and H{sub d}{sup 3}/E{sub r}{sup 2} ratios) than widely used CP Ti. A simple micromechanical model was used to calculate the elastic moduli of α′ and β phases, which were determined to be 151 GPa and 64 GPa, respectively.

• OSTI ID: 22805859
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 145; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTALLOGRAPHY
HARDNESS
LASER RADIATION
LAYERS
MELTING
NIOBIUM COMPOUNDS
PRESSURE RANGE GIGA PA
TEXTURE
TITANIUM ALLOYS
TITANIUM COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
WEAR RESISTANCE
X-RAY PHOTOELECTRON SPECTROSCOPY
ZIRCONIUM COMPOUNDS