Premium
An experimental study of creep‐ratchetting behavior of rolled AZ31B magnesium alloy at room temperature
Author(s) -
Meng Li,
Chen Wufan,
Feng Miaolin
Publication year - 2020
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13164
Subject(s) - materials science , creep , crystal twinning , slip (aerodynamics) , metallurgy , magnesium alloy , magnesium , ductility (earth science) , alloy , stress (linguistics) , composite material , microstructure , thermodynamics , linguistics , physics , philosophy
To study the interaction effect of creep and ratchetting for rolled AZ31B magnesium alloy at room temperature, a series of stress‐controlled tests were designed. In the tests, four loading types with different mean stresses were considered, and dwell loading was applied to explore the creep effect on the ratchetting. The test results indicated that the sequence of ratchetting and creep loading is crucial for the strain evolution. The amount of twinning/detwinning increased as the mean stress decreased, leading to an exhaustion of nonbasal slip during ratchetting, and then suppressed the creep ductility. However, the creep sequence exerted little influence on the strain shift of ratchetting while large amount of twinning/detwinning was involved.