Effects of mould temperature on microstructure and tensile properties of thixoforged Mg 2 Si p /AM60B in-situ composites

Zhang, S.Q.; Chen, T.J.; Cheng, Faliang; Li, L.L.

doi:10.1016/j.jallcom.2015.10.189

Cited by 13 publications

(1 citation statement)

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“…To further improve the properties of magnesium, the fabrication of MMCs (metal-matrix composites) is the most common method, of which SiC, TiC, Al 2 O 3 , and Mg 2 Si are the relatively common strengthening particles. Zhang fabricated Mg 2 Si p /AM60B by the thixoforging process, which improves the mechanical properties sharply [5]. Guan et al prepared a SiC p -reinforced magnesium foundation matrix composite by stirring the casting process, and SiC p could be evenly distributed in the matrix and had good interface bonding.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mold Temperature on the Microstructures and Tensile Properties of the Thixoforged Graphite/AZ91D Composite

Geng

Jiang

Zhang

et al. 2023

Metals

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The effects of mold temperatures on the microstructures and mechanical properties of thixoforged Grp (graphite particles)/AZ91D composites have been investigated, followed by partial remelting and thixoforging technology. The results indicate that the best semi-solid microstructure could be obtained after being partially remelted at 600 °C and held for 60 min. Correspondingly, under a mold temperature of 300 °C, the best tensile properties were obtained by thixoforging. The UTS (ultimate tensile strength) and elongation of the thixoforged Grp/AZ91D were up to 304.1 MPa and 13.9%, respectively, which increased 11.3% and 43.1% in comparison with the thixoforged AZ91D, respectively. The variation of the tensile properties responded to the influences of mold temperatures on the amount of eutectic phase, the distribution of Grp, and the grain size of α-Mg. Meanwhile, HRTEM (High Resolution Transmission Electron Microscope) showed good bonding between Grp and AZ91D, and many edge dislocations were found in the inverse FFT (Fast Fourier Transform) image. And the result showed that the increase in tensile properties is attributed to the synergistic effect of load transfer, dislocation strengthening, and Orowan looping mechanisms from the Grp strengthening the matrix.

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Section: Introductionmentioning

confidence: 99%