Investigating the Tribological Behavior of Aluminum Alloys Produced by a Novel Method: Gas-Induced Semi-Solid (GISS) Casting Technology

Tezgel, Yilmaz; Tunc, Ipek; Kaya, Oguzhan; Yesilcubuk, A.; Mutlu, Muammer; Keleş, Özgül

doi:10.1007/s40962-021-00619-2

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…Recently, the semi-solid casting has been applied to hypereutectic Al-Si alloys, and obtaining a satisfactory semi-solid slurry has become the key to this process. 18 Shehata et al 19,20 reported that the sizes of primary Si in A390 alloy prepared by semi-solid casting using the cooling slope plate method are 20.2 lm and 36 lm in case of the sand and metallic mold, respectively. In our previous work, 21,22 the combined process of a water-cooled copper serpentine pouring channel (SPC) and Sr-modifier was proposed for preparing the semi-solid slurry of A390 hypereutectic Al-Si alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of Antimony on the Microstructure Evolution and Mechanical Properties of Hypereutectic Al–Si Rheological High Pressure Die Casting Alloy

et al. 2021

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In order to refine both primary and eutectic Si in the A390 aluminum alloy to improve the mechanical properties, a combined process of the serpentine pouring channel (SPC) and Sb-modifier was developed to prepare a semi-solid slurry for the rheological high pressure die casting (Rheo-HPDC). The results indicate that the refinement of primary Si particles (PSPs) is attributed to the chilling and selfstirring induced by the SPC. Antimony has a negligible effect on the size of the PSPs and plays an important role in the refinement of eutectic Si. The Sb-rich intermetallic compounds (i.e., AlSb and Mg 3 Sb 2 ) cannot act as a heterogeneous nucleation site for the PSPs. The AlSb phase enclosed in the PSPs becomes the crack initiation of the PSPs. The refinement of primary and eutectic Si as well as the preparation temperature of semi-solid slurry (T PS ) are the crucial reasons for improving the mechanical properties of Rheo-HPDC A390-xSb alloy. The optimal ultimate tensile strength (UTS) and elongation (El) are 257 ± 6 MPa and 0.52 ± 0.04%, respectively, for the Rheo-HPDC A390-0.3 wt.% Sb at T PS of 680 °C.

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