Acoustic emission study of Mg–Al–Sr alloy reinforced with short Saffil® fibers deformed in compression

Máthis, Kristián; Farkas, Gergely; Janeček, Miloš; Choe, Heeman

doi:10.1016/j.msea.2013.03.045

Cited by 9 publications

(7 citation statements)

References 23 publications

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“…The combination of more intensive twinning and a longer mean free path of dislocations could result in a higher intensity of AE in the P eO case. • The AE signals in the terminal stage of the deformation in composites -the observed increase of the AE activity at higher strains is related to the fibers failure [16]. As it is obvious from Fig.…”

Section: Acoustic Emissionmentioning

confidence: 73%

“…• Lower AE activity in composites -this effect is caused mainly by the presence of the fibers, which act as obstacles for dislocation motion, and reduce the mean free path of dislocations. Further, the twin nucleation is suppressed owing to high internal stresses [16]. It is noteworthy that there is a higher intensity of the AE signal in the early stage of deformation for perpendicular fibers orientation.…”

Section: Acoustic Emissionmentioning

confidence: 96%

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Deformation Behavior of Mg-alloy-based Composites at Different Temperatures Studied by Neutron Diffraction

et al. 2018

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Deformation mechanisms in a Mg-Al-Ca alloy reinforced with short alumina fibres were studied by acoustic emission and neutron diffraction method (ND). The microstructure after deformation was observed by electron microscope (SEM). The fibres plane orientation with respect to the loading axis was found to be a key parameter, which influences the active deformation processes, such as twinning and dislocation slip. In-situ neutron diffraction tests were performed at room temperature (RT) and 100 • C. The relative twin volume in the matrix as a function of the applied compressive load were evaluated from the ND tests. Acoustic emission results indicate a larger twinning activity and more frequent fibre cracking in sample with perpendicular fibre plane orientation. Both of these mechanisms increase in magnitude at 100 • C.

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Section: Acoustic Emissionmentioning

confidence: 73%

Section: Acoustic Emissionmentioning

confidence: 96%

Deformation Behavior of Mg-alloy-based Composites at Different Temperatures Studied by Neutron Diffraction

et al. 2018

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“…The increase in hybrid composite hardness was because of the increased hardness of reinforcement particles of B 4 C, uniform distribution of B 4 C particles and the higher density. [8,17,30], [40].…”

Section: Resultsmentioning

confidence: 99%

Characterization, corrosion and failure strength analysis of Al7075 influenced with B₄C and Nano-Al₂O₃ composite using online acoustic emission

Prema¹,

Suresh²,

Ramanan

et al. 2020

Mater. Res. Express

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This paper aims to establish the mechanical, corrosion and failure analysis using online acoustic emission of Al7075 alloy, Al7075-B 4 C composite and Al7075-B 4 C-Al 2 O 3 hybrid composite with different Boron Carbide (B 4 C) content of 5, 10, 15 & 20% and Nano Aluminium Oxide (Al 2 O 3 ) content of 2% on a weight basis with the high energy stir casting method. The casted samples have been characterized by x-ray Diffraction (XRD), Thermo gravimetric analysis (TGA/DSC), Energy Dispersive Spectrum (EDS), and Scanning Electron Microscope (SEM). In case of hybrid composite, the hardness and the tensile strength decrease when the content of Al 2 O 3 increases. However, in the present research, the addition of B 4 C with nano Al 2 O 3 particles in certain proportions has increased the hardness and tensile strength. In addition, the tensile fractographs of the specimens were analysed using SEM. Acoustic Emission (AE) method was used for monitoring the acoustic energy that are released at the time of deformation process and early crack detection. The influence of the volume fraction of the B 4 C particulates on the microstructural and corrosion characteristics of Al7075-B 4 C with nano Al 2 O 3 metal matrix composites (MMCs) was also studied. It has been observed from the literature that the direct strengthening of composites occurs due to the presence of hard ceramic phase, while the indirect strengthening arises from the thermal mismatch between the matrix alloy and reinforcing phase during solidification. Based on the database for material properties, the application area of HAMCs has been proposed in the present review. The effects of nanomaterial dispersion in the metal matrix and the formation of interfacial precipitates on these properties are also addressed. Particular attention is paid to the fundamentals and the structure-property relationships of such novel Nano composites.

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“…The objective of the present study is to reveal the influence of short fibers on the mechanical behavior of a magnesium alloy. Recently, we presented the use of the acoustic emission (AE) method for investigating a magnesium-based MMC [10]. In the present study, neutron diffraction (ND), another in situ method, was used to complement the AE measurements.…”

Section: In Situ Investigation Of Deformation Mechanisms In Mg-based MMCmentioning

confidence: 99%

“…Second, in compression, a rapid growth of nucleated twins takes place, which is undetectable by the AE technique [11]. In the terminal stage of deformation, the signals that originate from fiber cracking also contribute to the AE response [10].…”

Section: Acoustic Emission and Ebsdmentioning

confidence: 99%

In situ investigation of deformation mechanisms in magnesium-based metal matrix composites

et al. 2015

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We studied the effect of short fibers on the mechanical properties of a magnesium alloy. In particular, deformation mechanisms in a Mg-Al-Sr alloy reinforced with short alumina fibers were studied in situ using neutron diffraction and acoustic emission methods. The fibers' plane orientation with respect to the loading axis was found to be a key parameter, which influences the acting deformation processes, such as twinning or dislocation slip. Furthermore, the twinning activity was much more significant in samples with parallel fiber plane orientation, which was confirmed by both acoustic emission and electron backscattering diffraction results. Neutron diffraction was also used to assist in analyzing the acoustic emission and electron backscattering diffraction results. The simultaneous application of the two in situ methods, neutron diffraction and acoustic emission, was found to be beneficial for obtaining complementary datasets about the twinning and dislocation slip in the magnesium alloys and composites used in this study.

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Acoustic emission study of Mg–Al–Sr alloy reinforced with short Saffil® fibers deformed in compression

Cited by 9 publications

References 23 publications

Deformation Behavior of Mg-alloy-based Composites at Different Temperatures Studied by Neutron Diffraction

Deformation Behavior of Mg-alloy-based Composites at Different Temperatures Studied by Neutron Diffraction

Characterization, corrosion and failure strength analysis of Al7075 influenced with B₄C and Nano-Al₂O₃ composite using online acoustic emission

In situ investigation of deformation mechanisms in magnesium-based metal matrix composites

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Acoustic emission study of Mg–Al–Sr alloy reinforced with short Saffil® fibers deformed in compression

Cited by 9 publications

References 23 publications

Deformation Behavior of Mg-alloy-based Composites at Different Temperatures Studied by Neutron Diffraction

Deformation Behavior of Mg-alloy-based Composites at Different Temperatures Studied by Neutron Diffraction

Characterization, corrosion and failure strength analysis of Al7075 influenced with B4C and Nano-Al2O3 composite using online acoustic emission

In situ investigation of deformation mechanisms in magnesium-based metal matrix composites

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Product

Resources

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Characterization, corrosion and failure strength analysis of Al7075 influenced with B₄C and Nano-Al₂O₃ composite using online acoustic emission