The Deformation Mechanism of Fatigue Behaviour in a N36 Zirconium Alloy

International Conference on Smart Engineering Materials 2018

Wang, Yingzhu^1

Huanggang Middle School, Guangzhou Branch, China^1

关键词: Deformation mechanism;    Electron back scatter diffraction;    Fatigue behaviour;    Front face;    Slip band;    Strain concentration;    The region of interest (ROI);    Three-point bending test;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/362/1/012010/pdf
DOI  :  10.1088/1757-899X/362/1/012010

来源: IOP

【 摘 要 】

Zirconium alloys are widely used as claddings in nuclear reactor. A N36 zirconium alloy has been deformed into a sheet with highly texture according to the result of electron back scatter diffraction test. Then this N36 zirconium alloy sheet has been cut into small beam samples with 12 x 3 x 3 mm3 in size. In this experiment, a three-point bending test was carried out to investigate the fatigue behaviour of N36 zirconium alloy. Cyclic loadings were applied on the top middle of the beam samples. The region of interest (ROI) is located at the middle bottom of the front face of the beam sample where slip band was observed in deformed beam sample due to strain concentration by using scanning electron microscopy. Twinning also plays an important role to accommodate the plastic deformation of N36 zirconium alloy in fatigue, which displays competition with slip.