Coarsening kinetics of nanoscale Al3Sc precipitates in an Al-Mg-Sc alloy Export

@article{citeulike:311672, abstract = {The effects of Mg alloying on the temporal evolution of Al3Sc (L12 structure) nanoscale precipitates are investigated, focusing on the morphology and coarsening kinetics of Al3Sc precipitates in an Al-2.2 Mg-0.12 Sc at.\% alloy aged between 300 and 400 [deg]C. Approximately spheroidal precipitates are obtained after aging at 300 [deg]C and irregular morphologies are observed at 400 [deg]C. The coarsening behavior is studied using conventional and high-resolution transmission electron microscopies to obtain the temporal evolution of the precipitate radius, and atom-probe tomography is employed to measure the Sc concentration in the [alpha]-matrix. The coarsening kinetics are analyzed using a coarsening model developed by Kuehmann and Voorhees for ternary systems [Kuehmann CJ, Voorhees PW. Metall Mater Trans A 1996;27:937]. Values of the interfacial free energy and diffusion coefficient for Sc diffusion in this Al-Mg-Sc alloy at 300 [deg]C are independently calculated, and are in good agreement with the calculated value of interfacial free energy [Asta M, Ozolins V, Woodward C. JOM 2001;53:16] and the experimental diffusivity obtained for the Al-Sc system [Marquis EA, Seidman DN. Acta Mater 2001;49:1909; Marquis EA. Ph.D. Thesis. Materials Science and Engineering Department, Northwestern University, 2002; Fujikawa SI. Defect Diffusion Forum 1997;143-147:115].}, author = {Marquis, Emmanuelle A. and Seidman, David N.}, citeulike-article-id = {311672}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.actamat.2005.05.025}, citeulike-linkout-1 = {http://www.sciencedirect.com/science/article/B6TW8-4GM46JF-1/2/f2f7f92903a93b71ed0a931b04f09fcd}, doi = {10.1016/j.actamat.2005.05.025}, journal = {Acta Materialia}, keywords = {al-mg-sc-alloys, coarsening}, month = {September}, number = {15}, pages = {4259--4268}, posted-at = {2005-09-05 18:26:36}, priority = {2}, title = {Coarsening kinetics of nanoscale Al3Sc precipitates in an Al-Mg-Sc alloy}, url = {http://dx.doi.org/10.1016/j.actamat.2005.05.025}, volume = {53}, year = {2005} }

TY - JOUR ID - citeulike:311672 L3 - citeulike-article-id:311672 N2 - The effects of Mg alloying on the temporal evolution of Al3Sc (L12 structure) nanoscale precipitates are investigated, focusing on the morphology and coarsening kinetics of Al3Sc precipitates in an Al-2.2 Mg-0.12 Sc at.% alloy aged between 300 and 400 [deg]C. Approximately spheroidal precipitates are obtained after aging at 300 [deg]C and irregular morphologies are observed at 400 [deg]C. The coarsening behavior is studied using conventional and high-resolution transmission electron microscopies to obtain the temporal evolution of the precipitate radius, and atom-probe tomography is employed to measure the Sc concentration in the [alpha]-matrix. The coarsening kinetics are analyzed using a coarsening model developed by Kuehmann and Voorhees for ternary systems [Kuehmann CJ, Voorhees PW. Metall Mater Trans A 1996;27:937]. Values of the interfacial free energy and diffusion coefficient for Sc diffusion in this Al-Mg-Sc alloy at 300 [deg]C are independently calculated, and are in good agreement with the calculated value of interfacial free energy [Asta M, Ozolins V, Woodward C. JOM 2001;53:16] and the experimental diffusivity obtained for the Al-Sc system [Marquis EA, Seidman DN. Acta Mater 2001;49:1909; Marquis EA. Ph.D. Thesis. Materials Science and Engineering Department, Northwestern University, 2002; Fujikawa SI. Defect Diffusion Forum 1997;143-147:115]. IS - 15 JF - Acta Materialia EP - 4268 TI - Coarsening kinetics of nanoscale Al3Sc precipitates in an Al-Mg-Sc alloy VL - 53 SP - 4259 KW - al-mg-sc-alloys KW - coarsening AU - Marquis, Emmanuelle AU - Seidman, David PY - 2005/09// UR - http://dx.doi.org/10.1016/j.actamat.2005.05.025 ER -