Effect of the Thermal Modulus and Mould Type on the Grain Size of AlSi7Mg Alloy

Lizarralde, Ibon; Niklas, Andrea; Fernández-Calvo, Ana Isabel; Lacaze, Jacques

doi:10.1007/978-3-319-65136-1_57

Cited by 1 publication

(2 citation statements)

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“…All of these are considered in the equation of the grain-size prediction in the thermal cup. The values of the parameters for the standard cups and the corresponding predicted grain size GS Th-Al [11,[12][13][14] for the cylinder castings, wheels, and steering knuckles are listed in Table 3.…”

Section: Thermal Analysis Cup Resultsmentioning

confidence: 99%

“…The quality of the melt preparation in terms of grain refinement has been extensively studied by thermal analysis techniques for standard cups in the AlSi7Mg alloy [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. However, obtaining a proper grain refinement in a standard cup does not assure that the grain refinement is correct in real parts (as was reported in a previous work for sand castings [12]).…”

Section: Introductionmentioning

confidence: 99%

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Grain-Size Prediction Model in Aluminum Castings Manufactured by Low-Pressure Technology

Fernández-Calvo

Lizarralde

Sal

et al. 2018

jcme

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The grain refinement in a real casting manufactured by Low Pressure Die Casting (LPDC) such as wheels and steering knuckles depends on the grain-refinement potential of the metal and the geometry of the part/process parameters. For this study, the effect of the cooling rate on the AlSi7Mg alloy with different metal qualities in terms of grain refinement was tested. The grain size has been metallographically evaluated in cylindrical test pieces and in the real wheels and steering knuckles manufactured at the Mapsa and Fagor Ederlan foundries. The Thermolan®-Al system has been used to evaluate the nucleation potential in terms of grain size on a standard cup. The grain size has been modeled taking into account the effect of the cooling rate measured in the center of the cylindrical test parts and the different grain-size potential. Different grades of refinement have been tested. The grain size measured in a real casting (wheel and steering knuckle) was used to calibrate the model for a real part in LPDC for different grain-size potential.

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Section: Thermal Analysis Cup Resultsmentioning

confidence: 99%