Comparing room and elevated temperature mechanical properties of AlSi۱۰Mg alloy fabricated by the additive manufacturing technology

The influence of temperature on the shear mechanical behavior of additively manufactured AlSi۱۰Mg aluminum alloy was investigated in this study. Samples were fabricated using the laser powder bed fusion (LPBF) technique, with build orientations of ۰°, ۴۵°, and ۹۰°. Shear punch testing (SPT) was conducted at room temperature (۲۵°C) and at an elevated temperature of ۴۷۵°C to evaluate the ultimate shear strength (USS) and deformation characteristics. The results revealed a dramatic temperature-dependent behavior, with USS values decreasing by approximately ۹۰% when temperature increased from ۲۵°C to ۴۷۵°C. At room temperature, the build orientation significantly affected the shear strength, showing approximately ۲۰% difference between ۰° and ۹۰° orientations. However, at the elevated temperature of ۴۷۵°C, this effect became negligible, with less than ۵% variation in shear strength among different build orientations. Microstructural analysis demonstrated that hot deformation led to the breakup and redistribution of the Al-Si eutectic network, resulting in comparable microstructures regardless of the initial build orientation. These findings highlight the critical importance of operating temperature in determining the mechanical performance of additively manufactured AlSi۱۰Mg components.

کلیدواژه ها:

AlSi۱۰Mg alloy ، Additive manufacturing ، Temperature effect ، Shear strength ، Build orientation