We have made some initial experiments on Additive Manufacturing of composite materials using an EOS SLM machine and, to start with, standard EOS AlSi10Mg materials. To interpret the microstructural results we see, we would need some information on the temperatures and time-temperature profiles to be expected during passing of the laser over one specific area of material: These seem to be more severe than we would expect.
Naturally, we have parameters like laser power and scanning speed, but we do not have exact figures on energy uptake of the powders etc., and besides I do not have a possibility to measure the T-t-profiles readily at hand (Would anybody have an idea/setup for any such very localised measurement, too?).
For this reason, I'd be interested in publications, datasets etc. that cover similar problems (not necessarily composites, the pure AlSiMg matrix would be fine to start with) and that discuss parameter influences.
Thanks for your help!
Selective laser melting of a stainless steel and hydroxyapatite composite for load-bearing implant development-
Journal of Materials Processing Technology
Volume 209, Issue 17, 19 August 2009, Pages 5793–5801
Selective laser melting of a stainless steel and hydroxyapatite composite for load-bearing implant development
L. Hao, ,
S. Dadbakhsh,
O. Seaman,
M. Felstead
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I used very fine k-type thermocouples and thermal camera for other welding application.
Microstructural and mechanical performance of aluminium to steel high power ultrasonic spot welding
Farid Haddadi, Fadi Abu-Farha
Dear Professores Axinte and Haddadi,
thanks for your kind support, I'll have a closer look at your suggestions. In the case of your measuerments, Professor Haddadi, would you have an overview on this study, maybe a publication on it that I could access?
Best regards,
Dirk Lehmhus
Dear Professor Axinte,
thanks again for your answer, I had a look at the papers you suggest, but it seems to me these only discuss processing parameters like energy input or scanning speed, but not the actual local temperature at the point were laser meets material, and its development in time (heating-up rate, cooling rate, reheating when the same location is passed again during scanning of a second, third, fourth etc. layer on top of the initial one). Are you aware of any publications that address this point?
Best regards,
Dirk Lehmhus
Hi Lehmhus,
I m working on a similar topic. Take a look on this paper!
Dear Marco,
thanks for the information, I'll have a look at it and may come back to you with questions - meanwhile, have a look at the attached file: I guess this could be interesting for you?
Kind regards,
Dirk
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