Quality assurance is one of the largest challenges to the widespread adoption of metal additive manufacturing technology. Printing pattern can significantly impact the temperature distribution during manufacturing process and thus the overall quality and residual stress formation of the manufactured components. In order to explore the intricate relationship, three different deposition patterns in DED-Arc additive manufacturing, the meander pattern, the spiral pattern and the newly developed S pattern, were experimentally and numerically scrutinized in terms of the resulting temperature distribution, grain size, porosity as well as residual stress formation. The study reveals that the variation of the deposition paths results in characteristic temperature fields and gradients with distinct local peak temperatures that determine the deposition quality, and simultaneously offers great degrees of freedom for optimal pattern design. Comparing the results with different deposition patterns, the S pattern leads to a more homogeneous temperature distribution, showing beneficial effects on the microstructure, porosity and residual stress formation in the deposited Al-4046 material, and is thus regarded as a promising alternative for improving additively manufactured parts quality.

质量保证是广泛采用金属增材制造技术的最大挑战之一。印刷图案可以显着影响制造过程中的温度分布，从而影响制造部件的整体质量和残余应力形成。为了探索复杂的关系，DED-Arc 增材制造中的三种不同沉积模式，曲折模式、螺旋模式和新开发的 S 模式，在由此产生的温度分布、晶粒尺寸、孔隙率方面进行了实验和数值研究。以及残余应力的形成。研究表明，沉积路径的变化导致特征温度场和梯度具有决定沉积质量的不同局部峰值温度，同时为优化图案设计提供了很大的自由度。将结果与不同沉积模式进行比较，S 模式导致更均匀的温度分布，显示出对沉积的 Al-4046 材料的微观结构、孔隙率和残余应力形成的有益影响，因此被认为是一种有前途的替代方法，可用于附加改进制造的零件质量。