Rapid manufacturing of rhenium components using EB‐PVD
Abstract
Purpose
The purpose of this paper is to provide insights for understanding the relationship between rapid manufacturing process for rhenium components in jet nozzle fabrication using electron beam‐physical vapor deposition (EB‐PVD). Specifically, to develop a methodology to characterize and improve this new process through motion planning for maintaining uniformity in the deposition thickness.
Design/methodology/approach
This research first identifies several important objectives for the process, and then develops an optimized heuristic method based on a look‐ahead approach to generate motion plans for uniform thickness objective. In this heuristic, the surface of the workpiece is modeled using finite element method and the accumulated thickness of each layer on each element is computed based on its location in the vapor plume using a ray casting algorithm.
Findings
Computational experiments show that the proposed algorithm can potentially provide significant improvements in the uniformity of the layers and cost savings in manufacturing compared to prevailing practice, especially for low‐volume production such as aerospace applications.
Research limitations/implications
In this research, net‐shaped jet nozzle has been fabricated using a graphite mandrel. Therefore, the mandrel‐based approach can be limited to producing hollow components.
Practical implications
The proposed method is very generic and thus can be applied for multi‐material manufacturing process identifying the sweet spot of the intersecting vapor plumes.
Originality/value
This research can help the EB‐PVD process for rapid manufacturing which has been considered as financially expensive to be accepted in real practice by providing a relationship of the process‐to‐product transformation through the developed motion planning methods.
Keywords
Citation
Prabhu, V.V., Fuke, I.V., Cho, S. and Singh, J. (2005), "Rapid manufacturing of rhenium components using EB‐PVD", Rapid Prototyping Journal, Vol. 11 No. 2, pp. 66-73. https://doi.org/10.1108/13552540510589421
Publisher
:Emerald Group Publishing Limited
Copyright © 2005, Emerald Group Publishing Limited