The present work was undertaken with the aim of studying the microstructural changes and intermetallic phases in Al-Si base 413.0 alloys as well as variations in tensile properties, including ultimate stress, yield strength and elongation at rupture, resulting from the addition of alloyed elements: strontium (Sr), magnesium (Mg), copper (Cu), silver (Ag), zinc (Zn) and nickel (Ni), to the base alloy 413.0, under different conditions of heat treatments, i.e., solutionizing and artificial aging (in the temperature range of 155 °C–240 °C). The results obtained in relation to microstructural observations and tensile tests reveal that the addition of alloying elements, in particular Mg, Cu, Ag, Ni, Zn and Sr, leads to an increase in the ultimate stress and yield strength values with a decrease in the strain levels of the base alloy 413.0, following hardening during artificial aging. Both Ag and Zn do not form specific phases during solidification at a slow rate of ~ 0.8 °C/s but only segregate to the α-aluminum cell boundaries. Addition of 0.73% Ag improves the values of yield strength at all aging temperatures. Also, it enhances the alloy resistance to softening during aging in the temperature range 200–240 °C. Similar behavior was exhibited by the addition of 2.5% Zn.

进行本工作的目的是研究Al-Si基413.0合金的微观结构变化和金属间相以及由于添加合金元素而导致的拉伸性能变化，包括极限应力，屈服强度和断裂伸长率：锶（Sr），镁（Mg），铜（Cu），银（Ag），锌（Zn）和镍（Ni）在不同的热处理条件下（固溶和人工时效（在155°C–240°C的温度范围内）。与显微组织观察和拉伸试验有关的结果表明，添加合金元素，特别是Mg，Cu，Ag，Ni，Zn和Sr，会导致极限应力和屈服强度值的增加，而降低。基体合金413.0的应变水平，在人工时效过程中硬化。在凝固过程中，Ag和Zn都不会以〜0.8°C / s的慢速形成特定的相，而只会分离到α-铝的细胞边界。添加0.73％Ag可改善所有时效温度下的屈服强度值。此外，它还增强了合金在200–240°C的温度范围内的时效处理过程中抗软化的能力。通过添加2.5％的Zn表现出相似的行为。