The process of laser-based powder bed fusion of metals (PBF-LB/M) is one of the most promising technologies in the field of additive manufacturing. The high freedom of design enables the integration of functionality and production of customized parts. Main drawbacks of this technology are related to relatively low build rates and reliability. The reliability of parts can be derogated due to various process instabilities leading to process-induced defects and process errors, where the latter can even lead to an interruption of the process. Due to limited build rates, a continuation of the process would be highly desirable, however, data reporting on the structural integrity of such interruptedly built parts are hardly available in literature so far. To tackle this research gap, the current study investigates the influence of process interruptions on the properties of AlSi12 processed by PBF-LB/M. The influence of the interruption on microstructure evolution is examined by electron backscatter diffraction. Mechanical properties of these specimens under monotonic and cyclic loading ranging from low-cycle fatigue up to very high-cycle fatigue regimes are investigated and compared to data obtained from counterparts built without interruption.

基于激光的金属粉末床熔融工艺（PBF-LB/M）是增材制造领域最有前途的技术之一。高度的设计自由度使功能性和定制零件的生产成为可能。该技术的主要缺点与相对较低的构建率和可靠性有关。由于各种工艺不稳定性导致工艺缺陷和工艺错误，零件的可靠性可能会降低，后者甚至可能导致工艺中断。由于建造速度有限，非常需要继续该过程，但是，迄今为止，文献中几乎没有关于此类间断建造部件的结构完整性的数据报告。为了解决这一研究空白，目前的研究调查了工艺中断对 PBF-LB/M 加工的 AlSi12 性能的影响。通过电子背散射衍射检查中断对微观结构演化的影响。研究了这些试样在从低周疲劳到非常高周疲劳状态的单调和循环载荷下的机械性能，并与从不间断构建的对应物获得的数据进行了比较。