Untitled

Abstract

A data acquisition system and the SAD2 software, that provide characteristic cooling curves, in combination with microstructure analysis were used to study precipitates formation in the AA 380.0 aluminium alloys modified by adding extra magnesium. The samples were solidified with distinct cooling rates caused by carrying out the solidification in shell and permanent molds. The mathematics processing of the cooling curves in agreement with the microstructure analysis have confirmed the remarkable presence of both the Al-Si dendrite network and the Mg 2 Si interdendritic phase in the alloys with the addition of extra magnesium.

Study of the influence of copper and magnesium additions on the microstructure formation of Zn–Al hypoeutectic alloys

“…In order to generate the zero curve, that portion of the cooling curve not affected by phase transformations is used, where only heat transfer by conduction in the metal is assumed. The amount of heat evolved or absorbed during the phase transformation can be determined by the area between the first derivative of the cooling curve and the zero curve, which can be evaluated using numerical methods of integration [12][13][14][15][16].…”

Carbide to Graphite Transition Control by Thermal Analysis in Grey Cast Irons

“…Thermal analysis, based on the recorded cooling curves and their derivatives is one of the most effective technique, with a large industrial application, in control of solidification process in production of all of metallic castings, such as for aluminium alloys [3][4][5][6][7][8][9][10][11][12][13][14][15][16], copper alloys [3,17], zinc alloys [18], steel [19][20][21][22] and cast irons [1,8,[23][24][25][26][27][28][29][30][31][32][33]. Thermal analysis is also applied on solid state evaluation of the structure characteristics of other special metallic materials, as effects of different influencing factors, such as heat treatment and quenching media on the CuAlFeMn quaternary shape memory alloy [34].…”

Effect of cooling rate on microstructural development in alloy ALMG9

“…For this reason, casting alloys with higher strength and outlook are urgent to be developed to produce the high-integrity-shape automotive parts that can be subjected to cyclic stress, such as sub-frame and door frame. Excellent mechanical properties of Al-Mg alloys with Si addition and low production costs have earmarked this alloy for selection as a structural material in the production of most industrial products mainly to produce structural components in automotive industry [7][8][9][10][11][12].…”