论文部分内容阅读
本文通过轧制和轧制退火的预处理,使两种铝合金LF6,LYl2、呈规超塑性效应。在最佳变形条件下两种合金轧态的延伸率为最高,其δ值分别为228％和226％,其流动应力分别为:0.25kgf/mm~2和2.19kgf/mm~2。两种轧态的合金都是通过动态再结晶达到晶粒的等轴化。两种合金试样过早断裂的主要原因是由于第二相与基体相界面上发生空洞及其连接所引起的。为挖掘合金的塑性潜力,应对第二相的尺寸及其分布进行控制,为此应进行特殊预处理,使其达到超细状态和弥散分布,有可能进一步提高合金的塑性。
In this paper, the pretreatment of rolling and rolling annealing, so that the two aluminum alloys LF6, LYl2, superplastic effect. Under the optimum deformation conditions, the elongation of the two alloys is the highest, with δ values of 228% and 226%, respectively. The flow stress of the two alloys are 0.25kgf / mm ~ 2 and 2.19kgf / mm ~ 2, respectively. Both types of alloy in the as-rolled state achieve equiaxed grain through dynamic recrystallization. The main reason for the premature rupture of the two alloy samples is due to voids and their connections at the interface between the second phase and the matrix. In order to excavate the plastic potential of the alloy, the size and distribution of the second phase should be controlled. For this reason, special pretreatment should be carried out to achieve ultrafine state and dispersion distribution, which may further increase the plasticity of the alloy.