In this study, the effects of 0.14 wt-% Sn on accelerating the precipitation kinetics during heat treatment are quantified. By calculating the activation energy of θ′ phase, it was found that the combined additions of Cu and Sn can reduce the energy barrier and increase the number density of the θ′ phase in the peak aged state, and thus improving yield strength and ultimate tensile strength from 239 and 318 to 445 and 457 MPa, respectively. Based on the quantitative analysis of the θ′ phase, it was found that with the combined additions of Cu and Sn, the average length of the θ′ phase increased from 18.11 to 25.82 nm, and the number density increased from 2.17 × 10²¹ to 4.62 × 10²¹ m⁻³.

在本研究中，量化了 0.14 wt-% Sn 对加速热处理过程中沉淀动力学的影响。通过计算θ ′相的活化能，发现Cu和Sn的联合添加可以降低峰值时效状态下θ ′相的能量势垒，增加数密度，从而提高屈服强度和极限拉伸。强度分别从 239 和 318 到 445 和 457 MPa。基于对θ ′相的定量分析发现，随着Cu和Sn的联合添加，θ ′相的平均长度从18.11增加到25.82 nm，数密度从2.17×10 ²¹增加到4.62 × 10 ²¹ 米^-3。