TY - JOUR
T1 - Assessment of microstructure and property of a service exposed turbine blade made of K417 superalloy
AU - Wang, Bingxue
AU - Wang, Chan
AU - Shi, Duoqi
AU - Yang, Xiaoguang
AU - Li, Zhenlei
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2017/9/19
Y1 - 2017/9/19
N2 - In this paper, a turbine blade made of K417 nickel-based superalloy after service for 600 hours was investigated, the microstructural features were identified through metallographic observation, the size of γ′ precipitates was adopted to quantitatively characterize the coarsening behavior, decomposition of primary carbides was also analyzed. In addition, micro-hardness tests were conducted on the turbine blade. The results indicated that size of γ′ precipitates in the tip region of the blade had a small increase, the decomposition of primary carbides did not occur. Meanwhile, the little reduction in micro-hardness in the tip section was found, which was caused by the coarsening of γ′ precipitates. To sum up, the service induced damage of the turbine blade after service for 600 hours was slight, the degeneration in the tip region was relatively obvious due to high temperature, the result is of great significance to evaluating the service safety of service exposed turbine blades.
AB - In this paper, a turbine blade made of K417 nickel-based superalloy after service for 600 hours was investigated, the microstructural features were identified through metallographic observation, the size of γ′ precipitates was adopted to quantitatively characterize the coarsening behavior, decomposition of primary carbides was also analyzed. In addition, micro-hardness tests were conducted on the turbine blade. The results indicated that size of γ′ precipitates in the tip region of the blade had a small increase, the decomposition of primary carbides did not occur. Meanwhile, the little reduction in micro-hardness in the tip section was found, which was caused by the coarsening of γ′ precipitates. To sum up, the service induced damage of the turbine blade after service for 600 hours was slight, the degeneration in the tip region was relatively obvious due to high temperature, the result is of great significance to evaluating the service safety of service exposed turbine blades.
UR - http://www.scopus.com/inward/record.url?scp=85033665243&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/231/1/012084
DO - 10.1088/1757-899X/231/1/012084
M3 - Conference article
AN - SCOPUS:85033665243
SN - 1757-8981
VL - 231
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012084
T2 - 2017 2nd International Seminar on Advances in Materials Science and Engineering, ISAMSE 2017
Y2 - 28 July 2017 through 30 July 2017
ER -