CYCLIC DEFORMATION BEHAVIOUR OF Ni_3(Al,Zr) SINGLE CRYSTAL AT ROOM TEMPERATURE
GU Yuefeng;LIU Yi;LIN Dongliang(T.L.Lin)(Shanghai Jiaotong University;Shanghai 200030);GUO Jianting(Institute of Metal Research;Chinese Academy of Sciences;Shenyang 110015)(Manuscript received 1995-01-13;in revised form 1995-07-03)
Cite this article:
GU Yuefeng;LIU Yi;LIN Dongliang(T.L.Lin)(Shanghai Jiaotong University;Shanghai 200030);GUO Jianting(Institute of Metal Research;Chinese Academy of Sciences;Shenyang 110015)(Manuscript received 1995-01-13;in revised form 1995-07-03). CYCLIC DEFORMATION BEHAVIOUR OF Ni_3(Al,Zr) SINGLE CRYSTAL AT ROOM TEMPERATURE. Acta Metall Sin, 1995, 31(11): 513-518.
Abstract Fully reversed strain-controlled tension-compression tests were performed at room temperature to study cyclic-deformation properties of Ni_3(Al,Zr) single crystal.Both cyclic strain hardening and a tension-compression flow stress asymmetry were recorded,the stress asymmetry becomes more prominent as the strain amplitude becomes larger;the cyclic hardening can divide into initiation and saturation stages.TEM observation showed that there are a profusion superlattic intrinsic stacking faults(SISFs) in fatigued Ni_3(Al,Zr) single crystal samples.The cyclic strain hardening is explained by the dislocation structure.