On-line prediction of aluminum–silicon eutectic modification level using thermal analysis

Effect of Phosphorus and Strontium Additions on Formation Temperature and Nucleation Density of Primary Silicon in Al-19 Wt Pct Si Alloy and Their Effect on Eutectic Temperature

“…[27] As shown by Table I, adding 0.2 wt pct Sr reduced the eutectic arrest temperature T 3 by 1.7 K. However, it seems that there is a limit beyond which this reduction in eutectic arrest temperature is replaced by an increase. [28] Figure 8 summarizes the effect of Sr on T 3 for the result of the present work and those of Nogita et al, [19] Kim et al, [21] Ba¨ckerud et al, [28] Faraji and Katgerman, [29] Shabestari and Ghodrat, [30] Djurdjevic et al, [31] and Heusler and Schneider [32] for Al-8.5 to 19 wt pct Si, A356, and 319 alloys. Ba¨ckerud et al [28] showed that, when the optimum modification was reached, eutectic nucleation and growth temperatures were reduced and recalescence disappeared.…”

Evaluation of (Al)-Si Eutectic Reference Temperature of A3xx Alloys

“…A comparison of reference temperatures predicted with equations from the present work, Apelian et al [2], Stuhldreier et al [12] and Djurdjevic [14], with thermal analysis data from literature [2,[14][15][16][17][18][19][20][21][22][23][24][25] is shown in Figure 3a. In addition, comparison with calculations made with Thermo-Calc and the TCAL1 database [26] according to Scheil's model are also shown in Fig.…”

Evaluation of the effect of grain refiners on the solidification characteristics of an Sr-modified ADC12 die-casting alloy by cooling curve thermal analysis

“…The recalescence magnitude for the Sr-modified alloy is 2.1°C, which decreased to 1 and 1.2°C after the addition of Al-3Ti-B and Al-5Ti-B. It has been shown that the depression of the eutectic growth temperature is a largely acceptable criterion for the evaluation of eutectic modification level [3,10,[24][25][26]. The larger magnitude of depression is associated with a higher level of modification.…”

“…It is also well established that the addition of modifier elements causes change in the metallurgical characteristics of eutectic Si, whose structure controls the mechanical properties of Al-Si castings [1]. Among the various modifiers, strontium has been used extensively, as it is easier to handle, more resistant to fading [2,3] and possesses a recovery rate in the melt to the order of 90 %.…”