Application of neutron powder diffraction to the characterization of impulse atomized Al-Cu-Sc droplets
The development of aluminium alloys with increased strength and ductility is an ongoing challenge for automotive and aerospace applications. The addition of Scandium (Sc) has yielded improved grain refinenent in binary aluminium alloys, as well as in complex alloys. Although Sc is an expensive alloying element when compared to industrially established Ti/B grain refiners, its combination with rapid solidification holds promise to capture the benefits of Sc grain refining with minimal additions. The aim of this proposal is to obtain experimental information on the solidification path of Impulse Atomized (IA) droplets of Al-Cu and Al-Cu-Sc alloys. It has been shown that high resolution neutron powder diffraction is a method of choice to determine the solidification of rapidly solidified droplets and perform relevant comparison with numerical models. The advanced characterization of IA droplets of aluminium alloys with and without addition of Sc can thus provide precise benchmark data to be used in numerical simulations, enlightening the effect of Sc on the solidification conditions.
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REINHART Guillaume; Thomas C. Hansen; NGUYEN THI Henri; SALLOUM ABOU JAOUDE Georges and SARKIS Carole. (2013). Application of neutron powder diffraction to the characterization of impulse atomized Al-Cu-Sc droplets. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-01-130
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