Low-cycle fatigue behavior of hot-extruded Al-5Cu-0.8Mg-0.15Zr-0.2Sc-0.5Ag alloy at T6 state
WANG Ying
CHEN Lijia
ZHOU Ge
ZHANG Haoyu
ZHANG Siqian
Abstract：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.
Keywords：Al-Cu-Mg-Ag alloyT6 treatmentlow-cycle fatiguecyclic hardeningcyclic stabilityfatigue lifedeformation mechanismfatigue fracture
Publication Date：2024-01-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 77-81 )