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薄壁DED加工结构行为的预测：实验-数值方法

Prediction of Behaviour of Thin-Walled DED-Processed Structure: Experimental-Numerical Approach.

作者信息

Urbánek Miroslav, Hodek Josef, Melzer Daniel, Koukolíková Martina, Prantl Antonín, Vavřík Jaroslav, Brázda Michal, Martínek Petr, Rzepa Sylwia, Džugan Jan

机构信息

COMTES FHT a.s., Prumyslova 995, 33441 Dobrany, Czech Republic.

出版信息

Materials (Basel). 2022 Jan 21;15(3):806. doi: 10.3390/ma15030806.

DOI:10.3390/ma15030806
PMID:35160750
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8837159/
Abstract

Additive manufacturing (AM) becomes a more and more standard process in different fields of industry. There is still only limited knowledge of the relationship between measured material data and the overall behaviour of directed energy deposition (DED)-processed complex structures. The understanding of the structural performance, including flow curves and local damage properties of additively manufactured parts by DED, becomes increasingly important. DED can be used for creating functional surfaces, component repairing using multiple powder feeders, and creating a heterogeneous structure with defined chemical composition. For thin parts that are used with the as-deposited surface, this evaluation is even highly crucial. The main goal of the study was to predict the behaviour of thin-walled structures manufactured by the DED process under static loading by finite element analysis (FEA). Moreover, in this study, the mechanical performance of partly machined and fully machined miniaturized samples produced from the structure was compared. The structure studied in this research resembles a honeycomb shape made of austenitic stainless steel AISI 316L, which is characterized by high strength and ductility. The uncoupled damage models based on a hybrid experimental-numerical approach were used. The microstructure and hardness were examined to comprehend the structural behaviour.

摘要

增材制造（AM）在不同工业领域正成为越来越标准的工艺。对于测量的材料数据与定向能量沉积（DED）加工的复杂结构的整体行为之间的关系，目前仍知之甚少。了解通过DED增材制造零件的结构性能，包括流动曲线和局部损伤特性，变得越来越重要。DED可用于创建功能表面、使用多个送粉器进行部件修复以及创建具有特定化学成分的异质结构。对于使用沉积态表面的薄零件，这种评估甚至至关重要。该研究的主要目标是通过有限元分析（FEA）预测由DED工艺制造的薄壁结构在静态载荷下的行为。此外，在本研究中，还比较了由该结构制成的部分加工和完全加工的小型化样品的力学性能。本研究中所研究的结构类似于由奥氏体不锈钢AISI 316L制成的蜂窝形状，其特点是高强度和高延展性。使用了基于混合实验-数值方法的非耦合损伤模型。对微观结构和硬度进行了检查，以了解结构行为。

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