Mechanical spectroscopy study on the Cu54Zr40Al6 amorphous matrix alloy at low temperature

Marques, Pedro; Chaves, J.M.; Silva, P.S.; Florêncio, Odila; Moreno-Gobbi, Ariel; Aliaga, Luis César Rodríguez; Filho, Walter José Botta

doi:10.1016/j.jallcom.2014.10.001

Cited by 9 publications

(4 citation statements)

References 32 publications

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“…Among the mechanical properties, mechanical spectroscopy measurements have never been extensively studied on SLM products. Mechanical spectroscopy is an energy absorption technique where waves of mechanical stress or strain interact with the structure of the solid (Marques et al , 2015). It is a thermo-mechanical analysis helpful in studying the inelastic response of materials.…”

Section: Introductionmentioning

confidence: 99%

Study of anisotropy through microscopy, internal friction and electrical resistivity measurements of Ti-6Al-4V samples fabricated by selective laser melting

Nespoli

Bennato

Villa

et al. 2022

RPJ

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Purpose This paper aims to investigate the microstructural anisotropy of Ti-6Al-4V samples fabricated by selective laser melting. Design/methodology/approach Specimens are fabricated through a Renishaw AM400 selective laser melting machine. Three microstructures (as-built, 850°C annealed and 1,050°C annealed) and two building orientations, parallel (PA) and perpendicular (PE) to the building platform, are considered. Starting from in-depth microscopic observations and comprehensive electron backscattered diffraction imaging, the study addresses non-conventional techniques such as internal friction and electrical resistivity measurements to assess the anisotropy of the fabricated parts. Findings Microscope observations highlight a fine texture with columnar grains parallel to the building direction in the as-built and 850°C annealed samples. Besides, coarse grains characterized the 1,050°C annealed specimens. Internal friction measurements pointed out the presence of internal stress while storage modulus analyses appear sensitive to texture. Electrical resistivity is resulted to be dependent on grain orientation. Originality/value The work uses some novel characterization techniques to study the anisotropy and internal stresses of Ti-6Al-4V samples processed by selective laser melting. Mechanical spectroscopy results suitable in this kind of study, as it mimics the operating conditions of the material.

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Section: Introductionmentioning

confidence: 99%

Study of anisotropy through microscopy, internal friction and electrical resistivity measurements of Ti-6Al-4V samples fabricated by selective laser melting

Nespoli

Bennato

Villa

et al. 2022

RPJ

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“…Recently, CuZr-based metallic glasses have attracted great attention due to their high strength and high thermal stability against crystallization with lower costs than Zr-based metallic glasses. Cu, Zr and Al have advantageous properties such as good toughness indicated by their high Charpy impact value, good corrosion resistance, and high glass-forming ability (GFA) [1]. Amorphous particles can be produced by mechanical milling or mechanical alloying [2,3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Copper-Based Composites Reinforced by CuZrAlNiTi Amorphous Particles with Enhanced Mechanical Properties

Tomolya

Sycheva

Svéda

et al. 2017

Metals

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Abstract:Novel amorphous/crystalline composites were developed combining the ductile copper matrix with hard CuZr-based amorphous powder. The amorphous powders of two compositions, Cu 39.2 Zr 36 Al l4.8 Ni 10 Ti 10 and Cu 39.2 Zr 35.2 Al 5.6 Ni 10 Ti 10 , produced by ball milling were used for reinforcement of the composites. Different mixing techniques, magnetic mixing, ultrasonic mixing and high-energy ball milling, were applied in order to create a homogenous mixture of the powders. The composites were produced by hot pressing under a purified argon atmosphere. Their microstructure, homogeneity and mechanical properties were investigated. It was observed that before hot pressing, minimal porosity had been obtained for the composite blended for 15 min by the ball-mill with a ball-to-powder ratio of 80:1. Its copper content was 50 wt %, which is the minimum to produce a compact composite. Reinforcing the copper by amorphous powders, the maximal compressive strength was enhanced to 490 MPa and 470 MPa, respectively, for the abovementioned composites. The yield strength of the copper due to reinforcement increased drastically from 150 MPa to 400 MPa and 420 MPa.

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“…However, the poor plasticity accommodated by highly localized shear banding has seriously stymied their application as structural materials. To alleviate the brittleness, synthesizing BMG composites with micron or nano-scale in-situ precipitated crystalline phase during has been rendered as an useful way [4][5][6][7]. Especially, in-situ dendrite-toughened BMG composites have attracted great interest due to their distinguished mechanical properties, which share the high strength of glass matrix as well as the large plasticity of dendrites [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…During deformation, these "soft" second phase with lower shear modulus relative to the glass matrix could effectively homogenize the deformation and stimulate the multiplication of shear bands [11,12]. To extend the application of these materials, their deformation behaviors under some extreme conditions, such as high strain rates [13][14][15][16], low or high temperature [7,17,18], have been concerned in very recent years.…”

Section: Introductionmentioning

confidence: 99%

Strain-rate-dependent deformation behavior in a Ti-based bulk metallic glass composite upon dynamic deformation

Bai

Wang

et al. 2015

Journal of Alloys and Compounds

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The deformation behavior of in-situ Ti 48 Zr 20 Nb 12 Cu 5 Be 15 bulk-metallic-glass (BMG) composites was investigated upon dynamic deformation. The present BMG composite exhibits good dynamic mechanical properties, combining high fracture strength (1850 MPa) with remarkable plasticity (> 10%) at the strain rate of 1.3 × 10 3 s-1. Ductile to brittle transition occurs with the increase of strain rates, which can be ascribed to the deteriorated ability of dendrites to impede the propagation of shear bands at higher strain rates. An obvious positive to negative transition on strain rate dependence of flow stresses can be observed with the increasing strain rates. Detailed analysis reveals that the variation from the dendrite-dominated mechanism associated with dislocation movement to the matrix-dominated fracture related to thermal softening is responsible for the present transition. The constitutive equations based on their deformation mechanisms are established for describing the present transition.

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Mechanical spectroscopy study on the Cu54Zr40Al6 amorphous matrix alloy at low temperature

Cited by 9 publications

References 32 publications

Study of anisotropy through microscopy, internal friction and electrical resistivity measurements of Ti-6Al-4V samples fabricated by selective laser melting

Study of anisotropy through microscopy, internal friction and electrical resistivity measurements of Ti-6Al-4V samples fabricated by selective laser melting

Synthesis and Characterization of Copper-Based Composites Reinforced by CuZrAlNiTi Amorphous Particles with Enhanced Mechanical Properties

Strain-rate-dependent deformation behavior in a Ti-based bulk metallic glass composite upon dynamic deformation

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