4.7 Article

Novel heating- and deformation-induced phase transitions and mechanical properties for multicomponent Zr50M50, Zr50(M,Ag)50 and Zr50(M,Pd)50 (M = Fe,Co,Ni,Cu) amorphous alloys

Journal

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 104, Issue -, Pages 109-118

Publisher

JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.06.046

Keywords

Multicomponent; Microstructure; Mechanical properties; Phase transition; Amorphous alloy

Funding

  1. Recruitment Program of Global Experts [WQ20121200052]
  2. National Natural Science Foundation of China [51771131]
  3. Deanship of Scientific Research (DSR) , at King Abdulaziz Uni-versity , Jeddah, Saudi Arabia [FP-101-42]
  4. Ministry of Education and Science of the Russian Federation [K2-2019-002]
  5. European Research Council under the European Union's Horizon 2020 research and innovation program [ERC-2015-AdG-695487]

Ask authors/readers for more resources

Multicomponent alloys of Zr50M50, Zr-50(M,Ag)(50), and Zr-50(M,Pd)(50) can be melt-spun to obtain amorphous ribbons with good bending plasticity and tensile properties. Cold-rolling and tension induce precipitation of different phases.
Multicomponent alloys of Zr50M50, Zr-50(M,Ag)(50) and Zr-50(M,Pd)(50) (M = Fe,Co,Ni,Cu) can be melt-spun to obtain amorphous ribbons. The maximum thickness for fully amorphous ribbons varies with composi-tion in the range 34-53 mu m. In contrast, fully amorphous ribbons are not obtainable for binary Zr50Ni50 or ternary Zr-50(Ni,Cu)(50) alloys. Heating-induced crystallization occurs through: two stages of amorphous [am] -> [am ' + B2] -> [B2 + B33] for Zr50M50; and [am] -> [ am ' + B2] -> [B2 + AgZr] for Zr-50(M,Ag)(50); and a single stage of [am] -> [B2] for Zr-50(M,Pd)(50), while no B2 phase is formed for the binary and ternary Zr(50)Q(50) (Q = Ni or/and Cu) alloys. As-spun amorphous ribbons have good bending plasticity. Remarkably, Zr50M50 ribbons in tension show 0.22-0.28% plastic elongation and work-hardening (the yield stress is similar to 820 MPa, the fracture stress is similar to 1200 MPa). When cold-rolled at room temperature to 30% reduction in thickness, Zr50M50 ribbons show 10% increase in hardness, while retaining good bending plasticity. Cold-rolling induces precipitation of spheroidal B2 and irregular B33 particles, while deforma-tion in tension induces B2, B33 and also plate-like monoclinic precipitates. The B2 and B33 particles form by polymorphic transformation, and include a high density of internal defects. This novel deformation-induced precipitation has not been recognized for any Zr(50)Q(50) binary or ternary alloys. The new multi-component systems are encouraging for future progress as structural amorphous alloys. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

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