TY - JOUR
T1 - Hardening behavior in aged Al-4%Cu-0.3%Mg alloys with 0.5 and 2%Ag additions
AU - Palmerin, Joel Moreno
AU - Rosales, Héctor J.Dorantes
AU - Hirata, Victor M.López
AU - Castro, Nicolás Cayetano
AU - Velázquez, Jorge L.González
AU - De J. Morales Ramirez, Angel
PY - 2009/12
Y1 - 2009/12
N2 - The precipitation characterization of Al-4 mass% Cu-0.3 mass% Mg alloy with additions of 0.5 and 2 mass% Ag during aging treatments was carried out by transmission electron microscopy (TEM) and microhardness measurements. TEM observation of aged samples showed that the Ω phase is the dominant phase and it is in coexistence with the θ' phase. Additionally, the Ω phase has the morphology of polygonal prism (almost hexagonal) with flat interfaces and a thin thickness. The variation of the cube of mean radius of precipitates, r 3, followed a linear relationship, as predicted by the Lifshitz, Slyosov and Wagner (LSW) theory for diffusion-controlled coarsening in both alloys. The coarsening process of the Ω phase was slower in the aged Al-4 mass% Cu-0.3 mass% Mg-2 mass% Ag alloy. The decrease in hardness seems to be related to the coarsening of the Ω phase and the loss of coherency.
AB - The precipitation characterization of Al-4 mass% Cu-0.3 mass% Mg alloy with additions of 0.5 and 2 mass% Ag during aging treatments was carried out by transmission electron microscopy (TEM) and microhardness measurements. TEM observation of aged samples showed that the Ω phase is the dominant phase and it is in coexistence with the θ' phase. Additionally, the Ω phase has the morphology of polygonal prism (almost hexagonal) with flat interfaces and a thin thickness. The variation of the cube of mean radius of precipitates, r 3, followed a linear relationship, as predicted by the Lifshitz, Slyosov and Wagner (LSW) theory for diffusion-controlled coarsening in both alloys. The coarsening process of the Ω phase was slower in the aged Al-4 mass% Cu-0.3 mass% Mg-2 mass% Ag alloy. The decrease in hardness seems to be related to the coarsening of the Ω phase and the loss of coherency.
KW - Aluminum-copper-magnesium-silver alloys
KW - Kinetics
KW - Precipitation
UR - http://www.scopus.com/inward/record.url?scp=74549141789&partnerID=8YFLogxK
U2 - 10.2320/matertrans.M2009233
DO - 10.2320/matertrans.M2009233
M3 - Artículo
SN - 1345-9678
VL - 50
SP - 2785
EP - 2789
JO - Materials Transactions
JF - Materials Transactions
IS - 12
ER -