摘要
Corrosion fatigue behavior of Alloy 52/52 M dissimilar metal weld(DMW)was investigated in borated and lithiated high-temperature water.The fatigue life of Alloy 52/52 M DMW in high-temperature water decreased in comparison with that in air.The fatigue cracks initiated at Alloy 52 M butt weld or at the interface of Alloy 52 buttering and Alloy 52 M butt weld.The welding residual strain and ductility dip cracking in Alloy 52 M butt weld promoted the initiation and propagation of fatigue cracks.The environmentally assisted fatigue damage in high-temperature water is discussed by taking account of microstructure defects.
基金
This work was jointly supported by the National Science and Technology Major Project(No.2017ZX06002003-004-002)
the Key Programs of the Chinese Academy of Sciences(No.ZDRW-CN-2017-1)
the National Natural Science Foundation of China(Nos.51601201 and 51671201)
the Innovation Fund of Institute of Metal Research,Chinese Academy of Sciences(No.SCJJ-2013-ZD-02).
