TY - JOUR
T1 - Behavior of microstructure evolution of ZL205A cast aluminum alloy during semi-solid isothermal annealing process
AU - Yang, Guangyu
AU - Jie, Wanqi
AU - Zhang, Runqiang
AU - Hao, Qitang
AU - Li, Jiehua
PY - 2007/10
Y1 - 2007/10
N2 - The behavior of microstructure evolution of ZL205A aluminum cast alloy during semi-solid heat-treatment process for different holding time was studied. It was found that the relationship between the average diameter of α(Al) grains and the isothermal holding time fit the formula r̄3-r̄03 = k′·t, where the constant k′ varied with the holding temperature, which is equal to 4.288 × 10-10 m3/s and 5.962 × 10-10 m3/s at 622°C and 631°C, respectively. The semi-solid isothermal annealing process of experimental alloy can be divided into three stages, i.e. preparation stage, spheroidization stage and coarsen stage. A higher holding temperature could accelerate spheroidization of α (Al). The microstructure evolution of the alloy is attributed the result of the diffusion of the solutes as well as vacancies, and the grain boundary tension. The diffusion of the solutes plays a leading role in the preparation stage, and the grain boundary tension dominates the late stages, e.g. spheroidization stage and coarsen stage.
AB - The behavior of microstructure evolution of ZL205A aluminum cast alloy during semi-solid heat-treatment process for different holding time was studied. It was found that the relationship between the average diameter of α(Al) grains and the isothermal holding time fit the formula r̄3-r̄03 = k′·t, where the constant k′ varied with the holding temperature, which is equal to 4.288 × 10-10 m3/s and 5.962 × 10-10 m3/s at 622°C and 631°C, respectively. The semi-solid isothermal annealing process of experimental alloy can be divided into three stages, i.e. preparation stage, spheroidization stage and coarsen stage. A higher holding temperature could accelerate spheroidization of α (Al). The microstructure evolution of the alloy is attributed the result of the diffusion of the solutes as well as vacancies, and the grain boundary tension. The diffusion of the solutes plays a leading role in the preparation stage, and the grain boundary tension dominates the late stages, e.g. spheroidization stage and coarsen stage.
KW - Coarsen
KW - Microstructure
KW - Semi-solid isothermal heat-treatment process
KW - ZL205A cast aluminum alloy
UR - http://www.scopus.com/inward/record.url?scp=36549056644&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:36549056644
SN - 1002-185X
VL - 36
SP - 1717
EP - 1721
JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
IS - 10
ER -