TY - GEN
T1 - Phase decomposition during aging in an A1-22wt.%Zn alloy
AU - Máximo, Lizbeth Melo
AU - Melo-Máximo, Dulce V.
AU - Lezama-Alvarez, Susana
AU - Avila-Davila, Erika O.
AU - Soriano-Vargas, Orlando
AU - Lopez-Hirata, Victor M.
AU - Gonzalez-Velazquez, Jorge L.
PY - 2010
Y1 - 2010
N2 - This work shows a study of morphology and growth kinetics of the phase decomposition as well as its effect on the hardening behavior during the aging at 100 and 120 °C in an Al-22wt.%Zn alloy. The aging process was analyzed using a solution of the nonlinear Cahn-Hilliard equation by the explicit finite difference method. Besides, the aging process was studied by XRD, TEM and Vickers hardness of the aged Al-22wt.%Zn alloy. The numerical simulation results showed the supersaturated solid solution decomposed spinodally into a mixture of Al- and Zn-rich phases after aging. Simulation and TEM results showed that the morphology of the decomposed phases was irregular and interconnected and it changed to rounded particles as aging progressed. The increase in hardness is related directly to the formation of the decomposed phases during aging of this alloy.
AB - This work shows a study of morphology and growth kinetics of the phase decomposition as well as its effect on the hardening behavior during the aging at 100 and 120 °C in an Al-22wt.%Zn alloy. The aging process was analyzed using a solution of the nonlinear Cahn-Hilliard equation by the explicit finite difference method. Besides, the aging process was studied by XRD, TEM and Vickers hardness of the aged Al-22wt.%Zn alloy. The numerical simulation results showed the supersaturated solid solution decomposed spinodally into a mixture of Al- and Zn-rich phases after aging. Simulation and TEM results showed that the morphology of the decomposed phases was irregular and interconnected and it changed to rounded particles as aging progressed. The increase in hardness is related directly to the formation of the decomposed phases during aging of this alloy.
KW - Al-Zn alloys
KW - Numerical simulation
KW - Spinodal decomposition
UR - http://www.scopus.com/inward/record.url?scp=77952401924&partnerID=8YFLogxK
M3 - Contribución a la conferencia
AN - SCOPUS:77952401924
SN - 9780873397537
T3 - TMS Annual Meeting
SP - 737
EP - 744
BT - TMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
T2 - TMS 2010 - 139th Annual Meeting and Exhibition
Y2 - 14 February 2010 through 18 February 2010
ER -