TY - JOUR
T1 - Effects of Re and Ru on the solidification characteristics of nickel-base single-crystal superalloys
AU - Liu, Gang
AU - Liu, Lin
AU - Zhao, Xinbao
AU - Ge, Bingming
AU - Zhang, Jun
AU - Fu, Hengzhi
PY - 2011/9
Y1 - 2011/9
N2 - The solidification characteristics, such as the phase transformation temperature and partition coefficient, were investigated in four Ni-base single-crystal superalloys with varied contents of Re and Ru. Differential scanning calorimetry (DSC) analysis reveals that the liquidus and solidus temperatures decrease with increasing levels of Re additions. However, the Ru only has negligible influences on the liquidus and solidus temperatures. The partition coefficient of constituent elements is investigated by using the directional solidification followed quenching (DSQ) technique. Re is found to reduce the segregation of Re and W, whereas Ru only has negligible effects on the segregation of Re and W. For comparison, the matrix scanning is performed on the representative dendritic structures. With increasing withdrawal rate, Re and Ru additions show the stronger influences on segregation behavior of alloying elements, particularly for Al and Ta.
AB - The solidification characteristics, such as the phase transformation temperature and partition coefficient, were investigated in four Ni-base single-crystal superalloys with varied contents of Re and Ru. Differential scanning calorimetry (DSC) analysis reveals that the liquidus and solidus temperatures decrease with increasing levels of Re additions. However, the Ru only has negligible influences on the liquidus and solidus temperatures. The partition coefficient of constituent elements is investigated by using the directional solidification followed quenching (DSQ) technique. Re is found to reduce the segregation of Re and W, whereas Ru only has negligible effects on the segregation of Re and W. For comparison, the matrix scanning is performed on the representative dendritic structures. With increasing withdrawal rate, Re and Ru additions show the stronger influences on segregation behavior of alloying elements, particularly for Al and Ta.
UR - http://www.scopus.com/inward/record.url?scp=80052639943&partnerID=8YFLogxK
U2 - 10.1007/s11661-011-0673-4
DO - 10.1007/s11661-011-0673-4
M3 - 文章
AN - SCOPUS:80052639943
SN - 1073-5623
VL - 42
SP - 2733
EP - 2741
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 9
ER -