Load Partitioning Between Mg17Al12 Precipitates and Mg Phase in the AZ91 Alloy Using In-Situ Synchrotron Radiation Diffraction Experiments

Garcés, G.; Medina, J.; Chávez, Bryan W.; Pérez, P.; Barea, Rafael; Stark, Andreas; Schell, Norbert; Adeva, P.

doi:10.1007/s11661-021-06258-w

Cited by 2 publications

(4 citation statements)

References 44 publications

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“…Figures 3-5 show that basal slip occurred on the {00.2}, {10.1}, {10.2}, and {10.3} planes at well below the proof stress in all samples. This phenomenon is commonly observed in diffraction investigation of compression of Mg alloys [6,27,28,32,[40][41][42][43]. The shallower gradient of the prismatic {10.0} and {11.0}, planes seen after the onset of microyielding shows that these planes bore increased strain as they were poorly oriented for basal slip.…”

Section: Discussionmentioning

confidence: 63%

“…AZ91 alloys are typically found to contain the intermetallic β-Mg 17 Al 12 which can precipitate continuously or discontinuously [27,33,37]. Precipitation of various aluminium carbides at the fibre-matrix interface of uncoated and AZ91 has also been observed [20].…”

Section: Discussionmentioning

confidence: 99%

“…However, these same factors lower the UCS of unreinforced T4 AZ91. Successful age-strengthening of AZ91 has been achieved in various studies [27,28,33,40]. Authors have attributed this to a combination of an increase the CRSS of basal slip and extension twinning, inhibition of twin growth, and load sharing between the matrix and precipitates [6,28,39,41].…”

Section: Discussionmentioning

confidence: 99%

“…Neutron diffraction has been used extensively to study deformation in Mg [25,26]. Synchrotron radiation diffraction has been used to study deformation in Mg alloys with special attention to the effect of precipitates [27,28]. Garcés et al [5][6][7] undertook a series of in situ studies using AZ31 and SiC as a reinforcement.…”

Section: Introductionmentioning

confidence: 99%

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In Situ Synchrotron Radiation Diffraction Study of Compression of AZ91 Composites Reinforced with Recycled Carbon Fibres

et al. 2022

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Lightweight structural materials are increasingly sought after in the automotive and aerospace industries for their potential to improve fuel efficiency. Magnesium-based metal-matrix composites are potential candidates for these kinds of applications. The use of recycled carbon fibres offers further energy and cost savings. The recycled carbon fibre composites were manufactured by stir casting with high-dispersion shearing, then were extruded and subsequently heat treated. The compressive deformation mechanisms of the composites compared to AZ91 were investigated using in situ synchrotron radiation diffraction. An increase in ultimate compressive strength was achieved in the composites compared to AZ91. The deformation mechanisms active in the composites were similar to those in AZ91. Magnesium alloys in compression typically show extensive twinning; this was observed in AZ91 and the AZ91 composites. The stress required for twinning onset was increased in the composites, and the twin volume fraction at failure was decreased compared to AZ91.

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Section: Discussionmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In Situ Synchrotron Radiation Diffraction Study of Compression of AZ91 Composites Reinforced with Recycled Carbon Fibres

et al. 2022

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Modification of Microstructure and Mechanical Properties of Extruded AZ91-0.4Ce Magnesium Alloy through Addition of Ca

Ni,

Peng,

Liu

et al. 2024

Materials

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The effect of the addition of alkali earth element Ca on the microstructure and mechanical properties of extruded AZ91-0.4Ce-xCa (x = 0, 0.4, 0.8, 1.2 wt.%) alloys was studied by using scanning electron microscopy, transmission electron microscopy, and tensile tests. The results showed that the addition of Ca could significantly refine the second phase and grain size of the extruded AZ91-0.4Ce alloy. The refinement effect was most obvious when 0.8 wt.% of Ca was added, and the recrystallized grain size was 4.75 μm after extrusion. The addition of Ca resulted in the formation of a spherical Al2Ca phase, which effectively suppressed the precipitation of the β-Mg17Al12 phase, promoted dynamic recrystallization and grain refinement, impeded dislocation motion, and exerted a positive influence on the mechanical properties of the alloy. The yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) of the AZ91-0.4Ce-0.8Ca alloy were 238.7 MPa, 338.3 MPa, and 10.8%, respectively.

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Load Partitioning Between Mg17Al12 Precipitates and Mg Phase in the AZ91 Alloy Using In-Situ Synchrotron Radiation Diffraction Experiments

Cited by 2 publications

References 44 publications

In Situ Synchrotron Radiation Diffraction Study of Compression of AZ91 Composites Reinforced with Recycled Carbon Fibres

In Situ Synchrotron Radiation Diffraction Study of Compression of AZ91 Composites Reinforced with Recycled Carbon Fibres

Modification of Microstructure and Mechanical Properties of Extruded AZ91-0.4Ce Magnesium Alloy through Addition of Ca

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