scholarly journals Smart Build-Plate for Metal Additive Manufacturing Processes

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 360 ◽  
Author(s):  
Adam Hehr ◽  
Mark Norfolk ◽  
Dan Kominsky ◽  
Andrew Boulanger ◽  
Matthew Davis ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Fiber Optic ◽  
Defect Formation ◽  
High Definition ◽  
Powder Bed ◽  
Metal Additive Manufacturing ◽  
Ultrasonic Additive Manufacturing ◽  
Fiber Optic Sensing ◽  
Manufacturing Technologies ◽  
Metal Additive

This paper discusses the development, processing steps, and evaluation of a smart build-plate or baseplate tool for metal additive manufacturing technologies. This tool uses an embedded high-definition fiber optic sensing fiber to measure strain states from temperature and residual stress within the build-plate for monitoring purposes. Monitoring entails quality tracking for consistency along with identifying defect formation and growth, i.e., delamination or crack events near the build-plate surface. An aluminum alloy 6061 build-plate was manufactured using ultrasonic additive manufacturing due to the process’ low formation temperature and capability of embedding fiber optic sensing fiber without damage. Laser-powder bed fusion (L-PBF) was then used to print problematic geometries onto the build-plate using AlSi10Mg for evaluation purposes. The tool identified heat generation, delamination onset, and delamination growth of the printed L-PBF parts.

scholarly journals WAAM and Other Unconventional Metal Additive Manufacturing Technologies

2020 ◽  
Vol 45 (2) ◽  
pp. 1-9
Author(s):  
Damjan Klobčar ◽  
Sebastijan Baloš ◽  
Matija Bašić ◽  
Aleksija Djurić ◽  
Maja Lindič ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Processing Parameters ◽  
Functionally Graded ◽  
High Deposition Rate ◽  
Graded Materials ◽  
Metal Additive Manufacturing ◽  
Ultrasonic Additive Manufacturing ◽  
Materials Used ◽  
Manufacturing Technologies ◽  
Metal Additive

The paper presents an overview of metal additive manufacturing technologies. The emphasis is on unconventional emerging technologies with firm background on welding technologies such as Ultrasonic Additive Manufacturing, Friction Additive Manufacturing, Thermal Spray Additive Manufacturing, Resistance Additive Manufacturing and Wire and Arc Additive Manufacturing. The particular processes are explained in detail and their advantages and drawbacks are presented. Attention is made on materials used, possibilities to produce multi-material products and functionally graded materials, and typical applications of currently developed technologies. The state-of-the-art on the Wire and Arc Additive Manufacturing is presented in more detail due to high research interests, it’s potential and widespread. The main differences between different arc additive manufacturing technologies are shown. An influence of processing parameters is discussed with respect to process stability and process control. The challenges related to path planning are shown together with the importance of post-processing. The main advantage of presented technologies is their ability of making larger and multi-material parts, with high deposition rate, which is difficult to achieve using conventional additive technologies.

Measurement of surface morphology of powder bed for metal additive manufacturing

2020 ◽  
Vol 2020 (0) ◽  
pp. S04110
Author(s):  
Kenya YUASA ◽  
Masaharu TAGAMI ◽  
Makiko YONEHARA ◽  
Toshi-Taka IKESHOJI ◽  
Koki TAKESHITA ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Surface Morphology ◽  
Powder Bed ◽  
Metal Additive Manufacturing ◽  
Metal Additive

Melt pool sensing and size analysis in laser powder-bed metal additive manufacturing

2018 ◽  
Vol 32 ◽  
pp. 744-753 ◽  
Author(s):  
Bo Cheng ◽  
James Lydon ◽  
Kenneth Cooper ◽  
Vernon Cole ◽  
Paul Northrop ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Size Analysis ◽  
Powder Bed ◽  
Metal Additive Manufacturing ◽  
Melt Pool ◽  
Metal Additive

scholarly journals Material Reuse in Laser Powder Bed Fusion: Side Effects of the Laser—Metal Powder Interaction

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 341 ◽  
Author(s):  
Eleonora Santecchia ◽  
Stefano Spigarelli ◽  
Marcello Cabibbo
Keyword(s):  
Additive Manufacturing ◽  
Side Effects ◽  
Metal Powder ◽  
Three Dimensional ◽  
High Energy ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Metal Additive Manufacturing ◽  
Metal Additive

Metal additive manufacturing is changing the way in which engineers and designers model the production of three-dimensional (3D) objects, with rapid growth seen in recent years. Laser powder bed fusion (LPBF) is the most used metal additive manufacturing technique, and it is based on the efficient interaction between a high-energy laser and a metal powder feedstock. To make LPBF more cost-efficient and environmentally friendly, it is of paramount importance to recycle (reuse) the unfused powder from a build job. However, since the laser–powder interaction involves complex physics phenomena and generates by-products which might affect the integrity of the feedstock and the final build part, a better understanding of the overall process should be attained. The present review paper is focused on the clarification of the interaction between laser and metal powder, with a strong focus on its side effects.

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