Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition
Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition
复制标题
双束激光金属沉积过程中基于反射测量的温度场研究
DOI：
10.1117/12.2576112
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Peters
中科院分区：
文献类型：
--
作者：
Gipperich;Peters
激光金属沉积（LMD）是一种高沉积速率的金属增材制造工艺。它的应用基本上是修理、包层和制造。两种最常用的LMD工艺是基于粉末的（LMD-p）和基于线的（LMD-w）。尽管基于线材的LMD材料效率更高，但工艺稳定性是一个主要问题。通过在连续工艺光束中加入调制激光束，观察到熔池几何形状的变化和能量吸收的增加。这种关系显示了提高工艺稳定性的巨大潜力。在这篇文章中，双激光束的使用对LMD-w工艺的积极影响得到了证明。为了解其因果关系，采用光学后向散射反射法（OBR）对工件温度场进行了研究。然后将结果与同时进行的工件上表面红外相机测量相关联。通过对双光束LMD热现象的深入了解，研究可以改善工艺温度控制。这为移动、能源和工程等许多行业的LMD-w制造工艺带来了新的视角。
Laser Metal Deposition (LMD) is a high deposition rate metal Additive Manufacturing process. Its applications are basically repair, cladding and manufacturing. The two most commonly used LMD processes are powder-based (LMD-p) and wire-based (LMD-w). Despite the fact that wire-based LMD is more material efficient, process stability is a major concern. By adding a modulated laser beam to the continuous process beam, a change of the melt pool geometry and increased energy absorption are observed. This relation shows great potential to increase process stability. In this contribution, the positive effect of the dual laser-beam use on LMD-w processes is demonstrated. To understand the cause-effect relation, the workpiece temperature field was investigated by optical backscatter reflectometry (OBR). The results were then correlated to simultaneously performed IR camera measurements of the workpiece’s upper surface. By better understanding the thermal phenomena in dual-beam LMD, research can improve process temperature control. This leads to a new perspective for the LMD-w manufacturing process in many industry sectors such as mobility, energy and engineering.
脉冲激光对双束激光金属沉积过程中温度分布的影响
影响因子：
2.9
作者：
Gipperich
通讯作者：
Gipperich
激光沉积焊综述：从微观到宏观
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
S. Kaierle;A. Barroi;C. Noelke;J. Hermsdorf;L. Overmeyer;H. Haferkamp
通讯作者：
H. Haferkamp
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
H. Hügel;T. Graf
通讯作者：
T. Graf