Microstructure of Inconel 718 parts with constant mass energy input manufactured with direct energy deposition
Microstructure of Inconel 718 parts with constant mass energy input manufactured with direct energy deposition
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采用直接能量沉积制造的具有恒定质量能量输入的 Inconel 718 零件的微观结构
DOI：
10.1016/j.promfg.2019.08.033
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Rethmeier
中科院分区：
文献类型：
--
作者：
Petrat;Brunner-Schwer;Rethmeier
基于激光的直接能量沉积（DED）作为增材制造技术允许生产近净形部件。工业应用需要稳定的工艺来确保可重现的质量。制造过程中的不稳定性可能导致不符合所需特性的故障组件。DED过程通过各种参数来调节，例如激光功率、速度、粉末质量流量和光斑直径，这些参数彼此相互作用。焊接中经常使用的比较参数是每单位长度的能量，并且由激光焊接中的激光功率和速度计算。还考虑了DED工艺中的每单位长度粉末比较参数，因为该填充材料除了基体材料之外还吸收能量。本文论述了质量能量作为确定增材制造零件性能的比较参数的影响。60 J/mm的每单位长度的相同能量以及7.2 mg/mm的每单位长度的相同粉末可以用不同的参数设置来调节。每单位长度的能量和每单位长度的粉末决定质量能量。在实验中，激光功率在400 W和900 W之间变化。通过调节速度和粉末质量流量，使单位长度的能量和单位长度的粉末保持恒定。使用Inconel 718的例子，进行实验与确定的参数集。在第一步中，通过显微切片产生并分析单个轨迹。轨道的几何形状显示高度和宽度的差异。此外，增加激光功率导致基础材料的更高稀释。为了确定增材制造使用的参数的适用性，单独的轨道用于构建具有20×20 mm²的正方形基底面积的部件。阿基米德原理的研究表明，随着激光功率的降低，孔隙率增加。通过对微截面的进一步分析，在低激光功率下，轨道之间出现连接错误。结果表明，激光功率、速度和粉末质量流量等参数对粉末成形的影响是非常重要的，因为相同的质量能量会导致不同的几何和微观特性。
The laser-based direct energy deposition (DED) as a technology for additive manufacturing allows the production of near net shape components. Industrial applications require a stable process to ensure reproducible quality. Instabilities in the manufacturing process can lead to faulty components which do not meet the required properties. The DED process is adjusted by various parameters such as laser power, velocity, powder mass flow and spot diameter, which interact with each other. A frequently used comparative parameter in welding is the energy per unit length and is calculated from the laser power and the velocity in laser welding. The powder per unit length comparative parameter in the DED process has also be considered, because this filler material absorbs energy in addition to the base material. This paper deals with the influence of mass energy as a comparative parameter for determining the properties of additively manufactured parts. The same energy per unit length of 60 J/mm as well as the same powder per unit length of 7.2 mg/mm can be adjusted with different parameter sets. The energy per unit length and the powder per unit length determine the mass energy. The laser power is varied within the experiments between 400 W and 900 W. Energy per unit length and powder per unit length are kept constant by adjusting velocity and powder mass flow. Using the example of Inconel 718, experiments are carried out with the determined parameter sets. In a first step, individual tracks are produced and analyzed by means of micro section. The geometry of the tracks shows differences in height and width. In addition, the increasing laser power leads to a higher dilution of the base material. To determine the suitability of the parameters for additive manufacturing use, the individual tracks are used to build up parts with a square base area of 20×20 mm². An investigation by Archimedean principle shows a higher porosity with lower laser power. By further analysis of the micro sections, at low laser power, connection errors occur between the tracks. The results show that laser power, velocity and powder mass flow must be considered in particular, because a constant mass energy can lead to different geometric as well as microscopic properties.
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激光熔覆轨道形成的一些方面
DOI：
--
发表时间：
1986
期刊：
Other Conferences
影响因子：
--
作者：
W. Steen;V. Weerasinghe;P. Monson
通讯作者：
P. Monson
激光熔覆 Inconel 718 的微观/宏观结构表征，沉积速率与机械性能相关
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
J. Witzel;Salay Stannard;A. Gasser;I. Kelbassa
通讯作者：
I. Kelbassa
DOI：
10.1016/j.jmatprotec.2012.10.006
发表时间：
2013-03-01
影响因子：
6.3
作者：
Bi, G.;Sun, C. N.;Gasser, A.
通讯作者：
Gasser, A.
影响因子：
4.6
作者：
Lambarri, Jon;Leunda, Josu;Sanz, Carmen
通讯作者：
Sanz, Carmen