Effect of High Temperature Air Exposure on Tensile Properties of Ni-base Superalloy Single Crystal CMSX-10(Strength & Fracture)

概要

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Tensile test was carried out in air at RT and 900℃ of as-received and air-exposed tensile specimen of CMSX-10 ([001] tensile loading direction). Cross section and gauge length of the specimen is 2mm wide × 2mm thick and 10mm long, respectively. Air-exposure was done at 1100℃ for 24 h, 240 h and 1000 h. At RT, yield strength decreased with increasing exposure time, while ultimate tensile strength was almost same. At 900℃, with exposure time, both yield strength and ultimate tensile strength decreased. Work hardening was recorded in the as-received, while no work hardening in the 240 h and 1000 h exposed specimens. Fracture surface was observed by a scanning electron microscope. Shear fracture takes place at RT, while flat fracture at 900℃. The difference of the fracture surface between RT and 900℃ is discussed.
一般社団法人日本機械学会の論文
2001-10-20