Effect of Heat Treatment on Thermal Conductivity of Aluminum Die Casting Alloys

Abstract

Thermal conductivity is an important property when high heat dissipation is a requirement during the use of the cast component. This study was carried out to study the effect of heat treatment on thermal conductivity of three common aluminum die casting alloys. Measurement of thermal conductivity was done by the Hot Disk method. A substantial increase in thermal conductivity was measured as a result of heat treatment. Microstructural changes due to heat treatment was examined by optical and scanning electron microscopy.

Thermal Properties of Selectively Laser-Melted AlSi10Mg Products with Different Densities

“…The thermal properties of the SLM-manufactured AlSi10Mg alloy in the as-built samples do not appear to be appreciably different from those measured in this alloy produced by conventional die casting. For example, the thermal conductivity at room temperature of the as-built SLM samples studied in the present work is found to be 115 to 122 W/m•K (see Table 1), which is similar to the values reported for the die cast alloys with a similar chemical composition [10,11]. Interestingly, whereas the TD values recorded for our material in the as-built condition are similar to those reported for AlSi10Mg by Yang et al [15], the the temperature dependences for TD in the heat-treated conditions do not exhibit the same trend.…”

“…While the thermal properties of conventionally produced aluminum alloys have been extensively studied, e.g. [9][10][11][12][13], for SLM products such properties have been investigated only in a small number of papers. In particular, there are very few studies of the effect of porosity on thermal properties and the directional dependence of the thermal diffusivity (TD) and thermal conductivity (TC) in SLM parts.…”

Thermal and electrical conductivity in Al–Si/Cu/Fe/Mg binary and ternary Al alloys

“…Although numerous studies have investigated the thermal conductivities of Al alloys [12][13][14], such studies have typically examined commercial alloys containing complex alloying elements with varying purity levels; furthermore, such examinations have been conducted using various processes. Multicomponent alloy systems typically contain a considerable amount of intermetallic compounds, and this may lead to difficulties in understanding the effects of alloying elements on the thermal conductivity of Al alloys.…”

Investigation on dynamic strain aging behaviour of ferritic-pearlitic ductile cast irons

“…'Hot Disk TPS 2500 S'-thermal constants analyzer, capable of measuring high thermal conductivities of metals like copper and aluminum alloys [53][54][55][56], was used to measure thermal conductivities of test alloys from room temperature up to 400 °C. Transient plane source method relies on mathematical modelling to derive thermal transport properties with a single measurement.…”

“…The heat propagated needs to be confined within the sample boundaries, or be insulated properly and be of known height, and thus in property calculations the material can be assumed as infinite bulk. The method has been shown to be useful for measuring engineering materials with high thermal conductivity [53][54][55][56]. Represented in a simplified manner, thermal properties can be identified from a single transient measurement using the following equations;…”