Solidification Analysis of an Al-19 Pct Si Alloy Using In-Situ Neutron Diffraction

Abstract

analysis required for advanced studies of grain refining, eutectic modification, etc. has been illustrated. This study will help to better understand the solidification mechanism of Al-Si alloys used for various casting component applications.

Solidification Analysis of Al‐Si Alloys Modified with Addition of Cu Using In‐Situ Neutron Diffraction

“…It is understood that as-cast microstructure of the material is much dependent on melt processing in casting operations. Molten metal pouring temperature and cooling rate (hence, solidification rate), for example, determines size and distribution of primary Si particles, as well as crystallographic characteristics of the Al-Si eutectic [7][8][9]. All these in many ways determine in-service properties of the cast components.…”

“…Various attempts have also been undertaken to characterize the solidification process using methods other than thermal analysis. Several attempts have been reported on application of neutron diffraction for solidification studies [8][9][10][11][12].…”

“…Most recently, W. Kasprzak, D. Sediako et al, [8,9] demonstrated the applicability of neutron diffraction to solidification analysis of a binary hypereutectic Al-19%Si alloy using step-wise cooling. Beside qualitative analysis, the authors showed the potential to quantify the volume fraction of primary Si and Al as well as Si in the eutectic phase using diffraction signals from liquid and solid phases as they evolved during solidification.…”

“…The particular interest of this analysis is the effect of Cu addition on the non-equilibrium solidification path of the Al-Si-Cu alloy, as compared to results reported earlier on the binary Al-Si system [8,9].…”

In Situ Study of Microstructure Evolution in Solidification of Hypereutectic Al-Si Alloys with Application of Thermal Analysis and Neutron Diffraction

“…[20] Many studies have been performed on the solidification behavior of these alloys and the resulting as-cast microstructure. Most recently, neutron diffraction [21][22][23][24][25] in conjunction with thermal analysis [3][4][5] were used to evaluate the solidification kinetics of hypereutectic Al-Si alloy under non-equilibrium and near-equilibrium conditions. In reports, [21,22] Iqbal et al carried out timedependent neutron diffraction measurements on the microstructure evolution of pure Al and Al-0.3 pct Ti-0.02 pct B alloy for different cooling rates.…”