Development of a novel fcc structure for an amorphous-nanocrystalline Ti-33Nb-4Mn (at.%) ternary alloy

Journal Article · Mon Jan 15 04:00:00 EST 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2017.11.021· OSTI ID:22832946

Garcia-Garrido, C.; Sayagues, M. J. ^[1]; Torres, Y. ^[2]; Amigo, V.; Aguilar, C. ^[3]

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1. Instituto de Ciencia de Materiales de Sevilla (ICMSE-CSIC), Américo Vespucio 49, 41092 Sevilla (Spain)
2. Department of Engineering and Materials Science and Transportation, University of Seville, Av. Camino de los Descubrimientos s/n, 41092 Seville (Spain)
3. Department of Metallurgical Engineering and Materials, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso (Chile)

Highlights: • An amorphized-nanocrystalline TiNbMn alloy was obtained via mechanical alloying. • The obtained TiNbMn ternary alloy evolved with the mechanical alloying time. • At lower milling time, two nanocrystalline phases (bcc and fcc) were developed. • At higher milling time, a stable amorphous-nanocrystalline fcc-alloy was obtained. • The fcc structure has not been previously published for Ti based alloys. - Abstract: In this work, a novel amorphous-nanocrystalline titanium‑niobium‑manganese solid solution ternary alloy with a Ti-33Nb-4Mn (at.%) nominal composition was developed by a High-Energy Mechanical Alloying. Nb and Mn were added to the elemental Ti as a β-phase (bcc) stabilizer and an amorphization promoter, respectively. The system evolved from the elemental Ti, Nb and Mn raw materials to a body centred cubic (bcc) TiNbMn alloy and, finally, to the formation of an original and stable face centred cubic (fcc) nanocrystalline TiNbMn alloy, not reported until now, at short milling time (20 h). This alloy remains invariant until 120 h. In turn, the partial amorphization of the system occurs and increases until at intermediate milling time (80 h). The production of both original fcc and the amorphous TiNbMn alloy may be beneficial for reducing the Young's modulus and improving the mechanical strength pursued for the Ti alloy. The optimal milling time respect to the amorphization, nanocrystalline size and Fe mount from milling media was 60 h and 80 h (TiNbMn60h and TiNbMn80h), with > 50 wt% of an amorphous phase and a crystalline domain size of approximately 5 nm.

• OSTI ID: 22832946
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 135; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
AMORPHOUS STATE
APPROXIMATIONS
BCC LATTICES
FCC LATTICES
MANGANESE COMPOUNDS
NANOSTRUCTURES
NIOBIUM COMPOUNDS
SOLID SOLUTIONS
TERNARY ALLOY SYSTEMS
TITANIUM COMPOUNDS