2006
DOI: 10.1007/s11661-006-0048-4
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Effects of rapid heating on solutionizing characteristics of Al-Si-Mg alloys using a fluidized bed

Abstract: Effects of rapid heat transfer using a fluidized bed on the heat-treating response of Al-Si-Mg alloys (both unmodified and Sr modified) were investigated. The heating rate in the fluidized bed is greater than in conventional air convective furnaces. Particle size analyses of eutectic Si showed that the high heating rate during fluidized bed solution heat treatment causes faster fragmentation and spherodization of Si particles compared to conventional air convective furnaces. The mechanism of Si fragmentation t… Show more

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Cited by 39 publications
(25 citation statements)
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“…Figures 10(a) and (b) show typical TEM micrographs of A356 cast alloy in (a) a specimen heated to 813 K (540°C) in a FB at 132 K/min and in (b) a specimen isothermally held at 813 K (540°C) in FB for 30 minutes. In a previous study, [8] it was noted that it takes 4 minutes to heat the sample to 813 K (540°C) in an FB. The TEM foils were machined from the periphery of the dendrite (including a part of Si).…”
Section: Sem Analysismentioning
confidence: 99%
See 1 more Smart Citation
“…Figures 10(a) and (b) show typical TEM micrographs of A356 cast alloy in (a) a specimen heated to 813 K (540°C) in a FB at 132 K/min and in (b) a specimen isothermally held at 813 K (540°C) in FB for 30 minutes. In a previous study, [8] it was noted that it takes 4 minutes to heat the sample to 813 K (540°C) in an FB. The TEM foils were machined from the periphery of the dendrite (including a part of Si).…”
Section: Sem Analysismentioning
confidence: 99%
“…[4][5][6][7] In our previous studies, we reported the effect of heating rate on solutionizing and artificial aging characteristics of cast Al alloys. [8][9][10] The heating rate plays an important role in altering the phase transformation mechanism and kinetics during various heat-treatment stages. Several reports have been published on the effect of heating rate on phase transformation(s) during heat treatment of wrought Al alloys; [11][12][13] however, not much has been reported on the effect of heating rate in cast Al alloys.…”
Section: Introductionmentioning
confidence: 99%
“…The high heating rate of the FB results in faster fragmentation and spheroidization of the Si particles, as well as the distribution and dissolution of microconstituents in the matrix, thereby increasing the ductility. 136 The highest values of elongation were obtained with the air quenching/T6-aging cycles of group C using a CF, which is to be expected due to the lowest strength values exhibited by these alloy samples.…”
Section: Tensile Propertiesmentioning
confidence: 72%
“…136 In the case of 354 alloys, the optimum solution heat-treatment time using the fluidized bed technique is 45 min at 527°C, for the complete dissolution of Mg2Si 58 and Q-Al5Cu2MggSi6 phases. 137 There have been some reported cases of incomplete dissolution for other formed phases such as A^Cu and Fe-rich intermetallics after solution heat treatment using FB and CF techniques.…”
mentioning
confidence: 99%
“…Among the industrial methods of aluminum metal matrix composites (MMCs) production, as much as a 10% share belongs to the mechanical stirring method [4]. In other hand continuing miniaturization of electronic devices has led to a significant increase in power density, resulting in an exponential growth of the heat flux on computer chips in the current decade.…”
Section: Introductionmentioning
confidence: 99%