TY - JOUR
T1 - Precipitation behavior of a novel cobalt-based superalloy subjected to prior plastic deformations
AU - Bian, Huakang
AU - Li, Yunping
AU - Wei, Daixiu
AU - Cui, Yujie
AU - Wang, Fenglin
AU - Sun, Shihai
AU - Yamanaka, Kenta
AU - Koizumi, Yuichiro
AU - Chiba, Akihiko
N1 - Funding Information:
The authors gratefully acknowledge the financial support from project of The Science Fund for Distinguished Young Scholars of Hunan Province , China ( 2016JJ1016 ), Fund of State Key Lab for Powder Metallurgy, Central South University.
Publisher Copyright:
© 2016
PY - 2016/12/15
Y1 - 2016/12/15
N2 - The precipitation behavior of a novel cobalt-based superalloy subjected to prior plastic deformations was investigated in details by using field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), etc. The precipitation of a μ-phase, which appeared at temperatures of 1073–1373 K, was confirmed, while MC-type carbide was observed at the temperatures > 1173 K. The prior plastic deformations promoted the precipitation of the μ-phase during subsequent aging. Further, the precipitation of the μ-phase at temperatures lower than 1173 K was confirmed to occur predominantly along the {111} slip bands; this was the dominant deformation mechanism of this alloy during plastic deformation. In contrast, there was no evidence that the precipitation of the MC-type carbide was affected by the prior plastic deformations in the case of the specimens exposed at 1273 and 1373 K.
AB - The precipitation behavior of a novel cobalt-based superalloy subjected to prior plastic deformations was investigated in details by using field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), etc. The precipitation of a μ-phase, which appeared at temperatures of 1073–1373 K, was confirmed, while MC-type carbide was observed at the temperatures > 1173 K. The prior plastic deformations promoted the precipitation of the μ-phase during subsequent aging. Further, the precipitation of the μ-phase at temperatures lower than 1173 K was confirmed to occur predominantly along the {111} slip bands; this was the dominant deformation mechanism of this alloy during plastic deformation. In contrast, there was no evidence that the precipitation of the MC-type carbide was affected by the prior plastic deformations in the case of the specimens exposed at 1273 and 1373 K.
KW - Cobalt-based superalloy
KW - Prior plastic deformations
KW - Suzuki segregation
KW - TCP phase
KW - μ-Phase
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U2 - 10.1016/j.matdes.2016.09.004
DO - 10.1016/j.matdes.2016.09.004
M3 - Article
AN - SCOPUS:84987956542
SN - 0264-1275
VL - 112
SP - 1
EP - 10
JO - Materials and Design
JF - Materials and Design
ER -