Friction-based riveting technique for AZ31 magnesium alloy

Wang, Tianhao; Whalen, Scott; Ma, Xiaolong; Silverstein, Joshua; Das, Hrishikesh; Pallaka, Madhusudhan R.; Ortiz, Ángel L.; Roosendaal, Timothy J.; Upadhyay, Piyush; Kappagantula, Keerti

doi:10.1016/j.jma.2021.06.004

Cited by 3 publications

(1 citation statement)

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“…To produce magnesium-matrix composites reinforced with ceramic particles, several techniques have been frequently used, such as spray deposition, powder metallurgy, squeeze casting, and stir casting. The latter has always been an attractive process due to its simplicity, flexibility, and capability of large quantities production 8 , 22 , 23 . Samples with low porosity are achieved in the stir casting method, which is desirable for thermal sink materials 24 – 28 .…”

Section: Introductionmentioning

confidence: 99%

Thermal cycles behavior and microstructure of AZ31/SiC composite prepared by stir casting

Mousavi

Sharifi

Tayebi

et al. 2022

Sci Rep

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In the present work, the effect of thermal cycles on the physical and thermal properties of AZ31 alloy and AZ31/5wt%SiC and AZ31/10wt%SiC composites was investigated. Samples were prepared using the stir casting method and then subjected to precipitation hardening. Thermal cycles were done for as-cast and aged samples with V-shaped notch under 300, 600, and 900 heating and cooling cycles at 150 and 350 °C. The crack length (CL) was evaluated using optical microscope (OM), scanning electron microscope (SEM), and energy-dispersive scanning electron (EDS) analysis. Also, density, porosity, thermal expansion coefficient of the samples were evaluated. X-ray diffraction (XRD) analysis was employed to assess the phases present in the material. The results demonstrated that by increasing the number of thermal cycles up to 600 at 150 °C and 350 °C, the porosity and density of the as-cast and aged AZ31 alloy decreased and increased, respectively; however, the density and open porosity were remained constant for the composite samples. The crack's length enlarged with increasing the thermal cycles from 300 to 600 µm at 150 °C and 300 to 900 µm at 350 °C. It was found that the reinforcement and precipitates prevented the rapid growth of the crack in the magnesium matrix. All in All, composite and the aged samples demonstrated better thermal fatigue resistance compared with that of the unreinforced alloy and as-cast samples, respectively.

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