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其他变量固定时,有无应变时效处理两情况下,低碳钢之应力应变曲线之差给出时效应力增量曲线,它是以强化效应表现出的应变时效的本身,在开始时有一尖峰。在有包兴格效应的情况下,有无时效处理的两应力应变曲线都是圆滑连续的,都没有峰性屈服点,但它们间的时效应力增量曲线仍在开始处有一尖峰。本文由柯垂耳气团理论及所涉能阻关系说明此一尖峰对应于有包兴格效应时的位错突围,也是用应力增量表示出的时效屈服点。它在静力实验中,由于包兴格效应而不能显示出峰性屈服点,但在冲击实验中,出现为相应的峰性屈服点。除开峰性特点而外,时效应力增量之存在还为现代断裂力学的严格理论提供了实验佐证。
Other variables fixed, with or without strain aging treatment of two cases, the difference between stress and strain curves of low carbon steel gives the increment curve of aging stress, which is the hardening effect of the strain aging itself, with a sharp peak at the beginning. In the case of Baixingge effect, both stress and strain curves with or without aging treatment are smooth and continuous, and have no peak yield point, but the increment curve of aging stress between them still has a sharp peak at the beginning. In this paper, Kezai ear air mass theory and the relationship between the resistance involved illustrate that this peak corresponds to the presence of the Baixingge dislocation breakup effect, but also the stress yield point of the aging yield point. In the static experiment, it can not show the peak yield point due to the Baoxingge effect, but in the impact experiment, the corresponding peak yield point appears. In addition to the peculiarities of peaks, the existence of the increment of aging stress also provides experimental evidence for the strict theory of modern fracture mechanics.