Optimization of processing parameters of cooling slope process for semi-solid casting of ADC 12 Al alloy

Abstract

In the present work, the effect of processing parameters of cooling slope techniques (pouring temperature, slope angle and slope length) of ADC 12 Al alloy on its microstructural evolution has been studied in detail. A series of cooling slope casting experiments were conducted by varying the pouring temperature (580, 585 and 590°C), slope length (400, 500 and 600 mm) and slope angle (30°, 45°and 60°). The effect of processing parameters on the response factors, viz. degree of sphericity and particle size, has been investigated by applying analysis of variance (ANOVA), interaction graphs obtained using response surface methodology. The obtained results infer that optimum values of the degree of sphericity (0.865) and particle size (49.30) are observed for the following set of processing parameters, namely 585°C pouring temperature, 500 mm slope length and 45°slope angle. ANOVA results show that the pouring temperature is the most significant input variables that influence degree of sphericity and particle size followed by slope length and slope angle. The values of output variables obtained from confirmation experiment, performed at 95% confidence level, ensure that they are well within the permissible limits.

The Effects of Nb Addition on the Microstructure and Mechanical Properties of Melt Spun Al-7075 Alloy

“…In order to further improve the mechanical properties of aluminum alloys, researchers make microstructure modifications by means of various additive elements such as Co, Ni, V, Sc, Ti, B and / or use new generation production techniques [7][8][9]. Methods such as precipitation hardening [10][11][12], deformation hardening [13,14], semi-solid casting [15,16] and/or various rapid solidification [2,5,[17][18][19] are applied to aluminum alloys whose strength cannot be increased by quenching. Many alloying elements are added to the aluminum alloy to refine the grain size by operating the heterogeneous nucleation mechanism.…”

Jaya Algorithm for Optimization of Cooling Slope Casting Process Parameters

“…Comparing process parameters and objective function values between the Jaya algorithm results and other experimental data also carried out. Proven that the Jaya algorithm gave a better optimal solution for a maximum degree of sphericity and minimum particle size than experimental data [7]. The Jaya algorithm in engineering and…”

“…The cooling slope experimental process conducted by Gautham [7] referred to in this study. The process parameters performed by varying the pouring temperature, pouring distance, and slanting angle.…”

“…The proper selection of process parameters and their boundary range affected the accuracy of modelling and optimization of the cooling slope process. The process of the selection input variable, the limit of the boundary, and operating range based on the literature have done by Gautham [7] are presented in Table 1.…”

The key attributes of processing parameters on semi-solid metal casting: An Overview

“…In microstructure shape factor and circular diameter reduces as pouring temperature lower down. Some other Al alloys were investigated for different temperature ranges and observations stated in Table-4 [59][60][61][62][63][64][65][66]. Decreased pouring temperature leads to the formation of globular primary α-Al grains but with lost sphericity and decreased particle size.…”