TY - JOUR
T1 - Phase decomposition in a mechanically alloyed Cu-44.5 at% Ni-22.5 at% Fe alloy during isothermal aging
AU - Lopez-Hirata, Victor M.
AU - Saucedo-Muñoz, Maribel L.
AU - Diaz-Barriga-Arceo, Lucia G.
PY - 2006/5
Y1 - 2006/5
N2 - A supersaturated solid solution of Cu-44.5 at%Ni-22.5 at%Fe alloy was produced by ball milling of a pure chemical elemental mixture for 1080ks. An fee supersaturated solid solution with a grain size of about 20 nm was obtained after milling. This alloy was subsequently aged at 803, 898 and 1003 K for different times. The growth kinetics of the modulation wavelength was determined from the X-ray diffraction results and followed the Lifshitz-Slyozov-Wagner theory for a diffusion-controlled coarsening in the MA alloy after aging. The growth kinetics of composition modulation wavelength for the MA alloy was faster at 803 and 898 K than that for the same alloy composition obtained by a conventional processing and then aged at the same temperatures. The activation energy for the decomposed phase coarsening process in the MA alloy was lower man that corresponding to me conventionally-processed alloy.
AB - A supersaturated solid solution of Cu-44.5 at%Ni-22.5 at%Fe alloy was produced by ball milling of a pure chemical elemental mixture for 1080ks. An fee supersaturated solid solution with a grain size of about 20 nm was obtained after milling. This alloy was subsequently aged at 803, 898 and 1003 K for different times. The growth kinetics of the modulation wavelength was determined from the X-ray diffraction results and followed the Lifshitz-Slyozov-Wagner theory for a diffusion-controlled coarsening in the MA alloy after aging. The growth kinetics of composition modulation wavelength for the MA alloy was faster at 803 and 898 K than that for the same alloy composition obtained by a conventional processing and then aged at the same temperatures. The activation energy for the decomposed phase coarsening process in the MA alloy was lower man that corresponding to me conventionally-processed alloy.
KW - Aging treatment
KW - Copper-nickel-iron alloys
KW - Kinetics
KW - Mechanical alloying
KW - Phase decomposition
UR - http://www.scopus.com/inward/record.url?scp=33745784823&partnerID=8YFLogxK
U2 - 10.2320/matertrans.47.1317
DO - 10.2320/matertrans.47.1317
M3 - Artículo
SN - 1345-9678
VL - 47
SP - 1317
EP - 1321
JO - Materials Transactions
JF - Materials Transactions
IS - 5
ER -