摘要 : Nanostructured Al-Zn-Mg-Cu alloy and boron carbide/Al-Zn-Mg-Cu composite powders are fabricated through cryomilling. eta'-MgZn2 precipitation in each material is characterized through differential scanning calorimetry. The activat... 展开 Nanostructured Al-Zn-Mg-Cu alloy and boron carbide/Al-Zn-Mg-Cu composite powders are fabricated through cryomilling. eta'-MgZn2 precipitation in each material is characterized through differential scanning calorimetry. The activation energy of eta' precipitation is derived through Kissinger analysis. The addition of boron carbide to nanostructured Al-Zn-Mg-Cu powder increases the onset and peak temperatures of ' precipitation, but do not significantly affect the activation energy. Further analysis of uncertainties in measurement indicates that weighted least squares linear regression is a more reliable method that supplements the use of differential scanning calorimetry as a method for rapid characterization of precipitation in materials. 收起