存储精力的大小用两微分扫描热量测定(DSC ) 为对在 0.42 和 5.21 之间的 von 协定紧张滚动寒冷的铜的样品被获得了,并且基于在传播电子显微镜(TEM ) 的微结构参数的大小。在两个盒子中,有紧张的存储精力的线性增加被发现。然而,在二测量价值之间的比率在一个重要范围上变化,显示一些小心在决定在与在一件给定的样品的变丑微观结构异质联系的精力的相对差别被需要。有流动压力的存储精力的比较建议基于 TEM 的大小反映为流动压力负责的脱臼密度内容,但是 DSC 技术另外测量另外的贡献到存储精力,例如平衡内部压力的存在。
Measurements of stored energy have been obtained for samples of copper cold-rolled to von Mises strains between 0.42 and 5.21 using both differential scanning calorimetry (DSC), and based on measurements of microstructural parameters in the transmission electron microscope (TEM). In both cases, a linear increase in stored energy with strain is found. The ratio between the two measured values varies, however, over a significant range, indicating that some caution is needed in determining the relative difference in energy associated with deformation microstructure heterogeneities in a given sample. Comparison of the stored energy with the flow stress suggests that the TEM-based measurements reflect the dislocation density content responsible for the flow stress, but that the DSC technique additionally measures other contributions to the stored energy, such as the presence of balanced internal stresses.