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J. Zrnik and M.Hazlinger(Faculty of Metallurgy , Technical University , Kosice , Slovakia)M.Zitnansky(Material- Technological Faculty , Trnava , STU Bratislava , Slovakia)Zhongguang WANG(State Key Labratory for Faigue and Fracture of Materials , Institute of Meta
材料科学技术（英文）
The effect of different initial microstructures deftned by γ' precipitate morphology has been investigated at the creep/fatigue conditions of 900℃ and 500 MPa. The wave form of stress as a function of time for cyclic load was of trapezoidal shape with a hold time of 10s at the upper stress level. The TEM was employed to examine the deformation process in strengthened γ' matrix in dependence of γ' precipitate morphology. The fracture lifetime and cycle number up to fracture were the criteria to evaluate the additional cyclic component efFect on the course of deformation
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