论文部分内容阅读
金属及合金在变形时,其强度及硬度通常是随着变形程度的增加而提高,而塑性及韧性则朝着相反的方向变化,这种现象,称为加工硬化。但霍华德(J.Howard)、当摩建和竹内庸等发现,在高纯度铝及某些合金中,存在着加工软化现象。所谓加工软化,就是高纯度铝、Al—Fe、Al—Co 及 Al—Ni 合金在变形速度快时,在初期其强度也是随着变形度的增加而升高,在变形程度大到一定值后,材科开始软化,即其强度随着变形程度的增加而降低。
Metal and alloy in the deformation, the strength and hardness is usually increased as the degree of deformation increases, while the plasticity and toughness in the opposite direction changes, this phenomenon is called work-hardening. However, Howard (J.Howard), when Morgan Stanley and bamboo found that in high-purity aluminum and some alloys, there is the phenomenon of processing softening. The so-called processing and softening, that is, high-purity aluminum, Al-Fe, Al-Co and Al-Ni alloy in the deformation speed, the initial strength is also increased with the increase of deformation, deformation in a large extent to a certain value , Material began to soften, that is, its intensity decreases as the degree of deformation increases.