Fabrication of Ti–Cu–Ni–Al amorphous alloys by mechanical alloying and mechanical milling

Kishimura, Hiroaki; Matsumoto, Hitoshi

doi:10.1016/j.jallcom.2010.12.181

Cited by 19 publications

(8 citation statements)

References 28 publications

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“…Figure 8 shows a SEM image and a composition map of the end product of the 25 h ball milled powders obtained using an EDS spectrometer attached to an SEM system. It is shown that the distributions of Al, Cu and Ti are homogenous and that none of them are localised, 18 confirming the compositional homogeneity of the alloys.…”

Section: Resultsmentioning

confidence: 54%

Alloying evolution and stability of Al₆₅Cu₂₀Ti₁₅during process of amorphisation by high energy ball milling

et al. 2012

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Mechanical alloying of Al 65 Cu 20 Ti 15 powder blend has been carried out by high energy vibrating ball mill. The process of amorphisation in the mechanically alloyed Al 65 Cu 20 Ti 15 powder and the stability of the amorphous phase during ball milling were investigated. Almost completely amorphous powder was achieved after 25 h ball milling. Examination of the microstructural constituents using X-ray diffraction and transmission electron microscopy shows that the amorphisation process was controlled by the transformation of both Al based solid solution and intermetallic compounds (Al 2 Cu, Cu 9 Al 4 and AlCu 2 Ti). However, that prolonging the ball milling time to 30 h led to the appearance of Cu 9 Al 4 , the Al 65 Cu 20 Ti 15 composite comprising nanocrystalline and amorphous phases could be stable after 50 h ball milling.

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Section: Resultsmentioning

confidence: 54%

Alloying evolution and stability of Al₆₅Cu₂₀Ti₁₅during process of amorphisation by high energy ball milling

et al. 2012

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“…High energy ball-milling, one of the non-equilibrium processing techniques, has been often used for preparing a wide range of metastable materials such as amorphous and nanocrystalline materials [10][11]. The most important event is a ball-powder collision, which ensures repeated severe plastic deformations [12] and fracture processes leading to the increase of lattice defects, crystallite refinement, and reaching nanosized or amorphous structures and phase transformations [13][14][15]. Due to repeated fracturing, cold welding, and re-fracturing of particles, new chemically active surfaces are developed and solid-state interdiffusion, supersaturation beyond the equilibrium limit can take place [16,17].…”

Section: Introductionmentioning

confidence: 99%

Effects of milling temperature and time on phase evolution of Ti-based alloy

Kristály

Svéda

Sycheva

et al. 2022

J min metall B Metall

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Ti50Cu25Ni20Sn5 (at.%) powder was subjected to high-energy ball milling at room temperature and -78?C. As a function of the milling time, evaluation of phases, morphology and the refinement of grain size were investigated by scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD), differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and laser-diffraction particle size analysis (PSA). The transformation of the crystalline structure into an amorphous structure and then the transformation into a nanocrystalline structure during further milling was detected. The stress-induced martensitic transformation has taken place after 30 min milling time at both temperatures, the cubic Cu(Ni,Cu)Ti2 phase transforms into the orthogonal structure. The hardness value of powders after 150 min milling time increases from 506 to 780 HV0.01. The milling temperature does not significantly influence the amount of amorphous fraction (33-36 wt.%) but the composition of amorphous content is more influenced by temperature. The interval of crystallite size was between 1.2 and 11.7 nm after 180 min of milling. The amount and the cell parameters of the Sn-containing phases are different between the two milling experiments, owing to the diffusion coefficients of the Sn atom differ to a large extent.

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“…The transformation of crystalline phases is usually not investigated in detail, with studies mainly focusing on the level of amorphous phase generation and disappearance of crystalline components [19,20]. Although the development of new crystalline phases by MA is frequently examined (by XRD or High-resolution transmission electron microscopy (HRTEM)), the transformations by MM have mostly been disregarded.…”

Section: Introductionmentioning

confidence: 99%

Phase Transformation and Morphology Evolution of Ti50Cu25Ni20Sn5 during Mechanical Milling

et al. 2018

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Nanocrystalline/amorphous powder was produced by ball milling of Ti50Cu25Ni20Sn5 (at.%) master alloy. Both laser diffraction particle size analyzer and scanning electron microscope (SEM) were used to monitor the changes in the particle size as well as in the shape of particles as a function of milling time. During ball milling, the average particle size decreased with milling time from >320 µm to ~38 µm after 180 min of milling. The deformation-induced hardening and phase transformation caused the hardness value to increase from 506 to 779 HV. X-ray diffraction (XRD) analysis was used to observe the changes in the phases/amorphous content as a function of milling time. The amount of amorphous fraction increased continuously until 120 min milling (36 wt % amorphous content). The interval of crystallite size was between 1 and 10 nm after 180 min of milling with 25 wt % amorphous fractions. Cubic Cu(Ni,Cu)Ti2 structure was transformed into the orthorhombic structure owing to the shear/stress, dislocations, and Cu substitution during the milling process.

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Fabrication of Ti–Cu–Ni–Al amorphous alloys by mechanical alloying and mechanical milling

Cited by 19 publications

References 28 publications

Alloying evolution and stability of Al₆₅Cu₂₀Ti₁₅during process of amorphisation by high energy ball milling

Alloying evolution and stability of Al₆₅Cu₂₀Ti₁₅during process of amorphisation by high energy ball milling

Effects of milling temperature and time on phase evolution of Ti-based alloy

Phase Transformation and Morphology Evolution of Ti50Cu25Ni20Sn5 during Mechanical Milling

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Fabrication of Ti–Cu–Ni–Al amorphous alloys by mechanical alloying and mechanical milling

Cited by 19 publications

References 28 publications

Alloying evolution and stability of Al65Cu20Ti15during process of amorphisation by high energy ball milling

Alloying evolution and stability of Al65Cu20Ti15during process of amorphisation by high energy ball milling

Effects of milling temperature and time on phase evolution of Ti-based alloy

Phase Transformation and Morphology Evolution of Ti50Cu25Ni20Sn5 during Mechanical Milling

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Alloying evolution and stability of Al₆₅Cu₂₀Ti₁₅during process of amorphisation by high energy ball milling

Alloying evolution and stability of Al₆₅Cu₂₀Ti₁₅during process of amorphisation by high energy ball milling