论文部分内容阅读
本文研究了恒塑性应变控制下，egualchannelangularextrusion（ECAE）技术制备的亚微米铜的室温拉压时称循环形变行为，结果表明，亚微米钢在εpl＝5×10(－4)和1×10(－3)下表现出典型的循环软化特征、且直到断裂没有饱和阶段；而在εpl＝1×10(－4)下循环至5000周，应力幅仍没有明显变化，样品表面的光学显微镜及SEM－electronchannelingcontrast（SEM－ECC）技术研究发现：存在着宏观形貌与单晶表面滑移线相类似的‘滑移线’，‘滑移线’在侧面与载荷轴成45°，而在前表面与载荷轴相垂直：微观上‘滑移线’又可分为细而长的‘滑移线’和宽而短的微剪切带，根据晶界协同滑动和晶粒协同变形观点对上述两种形式的形变局部化的形成分别进行了分析
In this paper, we study the cyclic deformation behavior of submicron copper prepared by egualchannelangularextrusion (ECAE) technique under constant plastic strain control. The results show that the submicron steel has better mechanical properties under εpl = 5 × 10 (-4) and 1 × 10 (-4) -3) shows typical cyclic softening characteristics, and until the fracture is not saturated phase; while in the εpl = 1 × 10 (-4) to 5000 weeks, the stress amplitude still no significant changes in the sample surface optical microscopy and SEM Electronchanneling research (SEM-ECC) studies have found that there is a ’slip line’ with a macroscopic topography similar to that of a single crystal surface, with a “slip line” 45 ° to the load axis on the side and a “slip line” And the load axis perpendicular to: microscopic ’slip line’ can be divided into thin and long ’slip line’ and wide and short micro-shear zone, according to the collaborative sliding grain boundaries and grain co-deformation view of these two The form of deformation localized formation were analyzed separately