Low-cycle fatigue behavior of hot-extruded Al-5Cu-0.8Mg-0.15Zr-0.2Sc-0.5Ag alloy at T6 state
In order to reveal the low-cycle fatigue deformation and fracture behavior of hot-extruded Al-5Cu-0.8Mg-0.15Zr-0.2Sc-0.5Ag alloy subjected to T6 treatment,the low-cycle fatigue tests were performed at both room temperature and 200℃with this alloy at T6 state.The experimental results show that the relationship between plastic strain amplitude and load reversal cycle follows the Coffin-Manson formula at both room temperature and 200℃,while the relationship between elastic strain amplitude and load reversal cycle follows the Basquin formula.During the low-cycle fatigue deformation at both room temperature and 200℃of the alloy,the deformation mechanism is mainly the planar slip at lower total strain amplitudes,while is mainly the wavy slip at higher total strain amplitudes.At both room temperature and 200℃,the low-cycle fatigue cracks initiate at the free surface of fatigue specimens and propagate in a transgranular mode.
万方数据
维普
