Speaker
Dr
Huang Chuanjun
(State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, PR China)
Description
High strength aluminum alloy AA2219 in T87 temper is widely used in fabrication of cryogenic propellant tanks. In the present work, tensile properties, fracture toughness and fatigue crack growth rate (da/dN) of AA2219-T87 sheet at room temperature, 153 and 90 K were investigated. The elastic-plastic J-integral fracture toughness was conducted with a compact tension (CT) specimen by means of unloading compliance method. The fatigue crack growth rate was conducted with a K-increasing test method. Fractographic analyses of fractured surfaces failed at room and low temperatures were performed and cryogenic mechanical properties were discussed.
Authors
Dr
Huang Chuanjun
(State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, PR China)
Mr
Li Shanfeng
(State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, PR China)
Dr
Wu Zhixiong
(State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, PR China)
Prof.
Huang Rongjin
(State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, PR China)
Mr
Wang Wei
(State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, PR China)
Prof.
Li Laifeng
(State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, PR China; University of Chinese Academy of Sciences, Beijing, PR China)