Imperial College London
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DrBoLan

Faculty of Engineering, Department of Mechanical Engineering

Non-Destructive Evaluation Research Fellow
 
 
 
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Contact

 

bo.lan

 
 
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Location

 

563City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Gillespie:2021:10.1121/10.0006386,
author = {Gillespie, J and Yeoh, WY and Zhao, C and Parab, ND and Sun, T and Rollett, AD and Lan, B and Kube, CM},
doi = {10.1121/10.0006386},
journal = {Journal of the Acoustical Society of America},
pages = {2409--2420},
title = {In situ characterization of laser-generated melt pools using synchronized ultrasound and high-speed X-ray imaging},
url = {http://dx.doi.org/10.1121/10.0006386},
volume = {150},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Metal additive manufacturing is a fabrication method that forms a part by fusing layers of powder to one another. An energy source, such as a laser, is commonly used to heat the metal powder sufficiently to cause a molten pool to form, which is known as the melt pool. The melt pool can exist in the conduction or the keyhole mode where the material begins to rapidly evaporate. The interaction between the laser and the material is physically complex and difficult to predict or measure. In this article, high-speed X-ray imaging was combined with immersion ultrasound to obtain synchronized measurements of stationary laser-generated melt pools. Furthermore, two-dimensional and three-dimensional finite-element simulations were conducted to help explain the ultrasonic response in the experiments. In particular, the time-of-flight and amplitude in pulse-echo configuration were observed to have a linear relationship to the depth of the melt pool. These results are promising for the use of ultrasound to characterize the melt pool behavior and for finite-element simulations to aid in interpretation.
AU  - Gillespie,J
AU  - Yeoh,WY
AU  - Zhao,C
AU  - Parab,ND
AU  - Sun,T
AU  - Rollett,AD
AU  - Lan,B
AU  - Kube,CM
DO  - 10.1121/10.0006386
EP  - 2420
PY  - 2021///
SN  - 0001-4966
SP  - 2409
TI  - In situ characterization of laser-generated melt pools using synchronized ultrasound and high-speed X-ray imaging
T2  - Journal of the Acoustical Society of America
UR  - http://dx.doi.org/10.1121/10.0006386
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000718308300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://pubs.aip.org/asa/jasa/article/150/4/2409/993683/In-situ-characterization-of-laser-generated-melt
UR  - http://hdl.handle.net/10044/1/108317
VL  - 150
ER  -
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