TY - JOUR
T1 - Analysis of β'(Cu4Ti) precipitation during isothermal aging of a Cu-4wt.%Ti alloy
AU - Lopez-Hirata, Victor Manuel
AU - Hernandez-Santiago, Felipe
AU - Saucedo-Muñoz, Maribel Leticia
AU - Dorantes-Rosales, Hector Javier
AU - Paniagua-Mercado, Ana Maria
N1 - Publisher Copyright:
© 2018 Universidade Federal de Sao Carlos. All rights reserved.
PY - 2018
Y1 - 2018
N2 - This work analyzed experimental and numerically the growth kinetics of β'precipitation of a Cu-4wt.%Ti alloy after aging at 400, 500 and 600 °C for times from 0.0166 h to 200 h. Results indicated that the precipitation process is almost controlled by nucleation and growth during aging at 400 °C, originating a slow growth kinetics of precipitation. In contrast, the coarsening of precipitates dominates the precipitation process during aging at 500 and 600 °C. The interfacial energy of interface between the a matrix phase and β' precipitates was determined to be about 0.1135, 0.0980 and 0.0725 Jm-2 for aging at 400, 500 and 600 °C, respectively. These values suggest a coherent interface which is in agreement with the flat faces of β' cuboid precipitates. Calculated Time-Temperature-Precipitation diagram for the β' precipitation indicated good agreement with experimental results. Precipitation hardening was higher for the slower growth kinetics of precipitation.
AB - This work analyzed experimental and numerically the growth kinetics of β'precipitation of a Cu-4wt.%Ti alloy after aging at 400, 500 and 600 °C for times from 0.0166 h to 200 h. Results indicated that the precipitation process is almost controlled by nucleation and growth during aging at 400 °C, originating a slow growth kinetics of precipitation. In contrast, the coarsening of precipitates dominates the precipitation process during aging at 500 and 600 °C. The interfacial energy of interface between the a matrix phase and β' precipitates was determined to be about 0.1135, 0.0980 and 0.0725 Jm-2 for aging at 400, 500 and 600 °C, respectively. These values suggest a coherent interface which is in agreement with the flat faces of β' cuboid precipitates. Calculated Time-Temperature-Precipitation diagram for the β' precipitation indicated good agreement with experimental results. Precipitation hardening was higher for the slower growth kinetics of precipitation.
KW - Cu-Ti alloys
KW - Growth kinetics
KW - Numerical simulation
KW - Precipitation
UR - http://www.scopus.com/inward/record.url?scp=85101228197&partnerID=8YFLogxK
U2 - 10.1590/1980-5373-MR-2018-0121
DO - 10.1590/1980-5373-MR-2018-0121
M3 - Artículo
AN - SCOPUS:85101228197
SN - 1516-1439
VL - 21
JO - Materials Research
JF - Materials Research
IS - 5
M1 - e20180121
ER -