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

Mousavi, Seyed FereidonUniv Shahrekord, Fac Engn, Dept Mat Sci, Shahrekord, Iran. (författare)

QC 20220926
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 degrees 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 degrees C and 350 degrees 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 mu m at 150 degrees C and 300 to 900 mu m at 350 degrees 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.

Sharifi, HassanUniv Shahrekord, Fac Engn, Dept Mat Sci, Shahrekord, Iran. (författare)
Tayebi, MortezaIslamic Azad Univ, Sci & Res Branch, Young Researchers & Elites Club, Tehran, Iran. (författare)
Hamawandi, Bejan,PhDKTH,Biomedicinsk fysik och röntgenfysik(Swepub:kth)u1g24thw (författare)
Behnamian, YasharUniv Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2V4, Canada. (författare)
Univ Shahrekord, Fac Engn, Dept Mat Sci, Shahrekord, Iran.Islamic Azad Univ, Sci & Res Branch, Young Researchers & Elites Club, Tehran, Iran. (creator_code:org_t)

Av författaren/redakt...: Mousavi, Seyed F ...; Sharifi, Hassan; Tayebi, Morteza; Hamawandi, Bejan ...; Behnamian, Yasha ...

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