Abstract
This paper presents a laser-based system for a local transformation of the magnetic properties in austenitic stainless steel. The process is applied to linear actuators with an integrated, in-axis position measurement where durability and high precision are needed. The developed system consists of a 400-W, single-mode fiber laser, the focusing optics, and a three-axis actuation system. An important feature is the optical feedback for the adaptive, high-speed (40 kHz) laser power regulation. The experimental results show that the optical feedback effectively compensates for the external disturbances, like an increased roughness and a gradual heat accumulation. The regulation decreases the dispersion of the magnetic signal’s response by more than 100% and shortens the transient time at the beginning of the inscription process from 100 to 15 ms.
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References
Dolsak G (2014) Magnetic encoder apparatus. US Patent 8,878,526, November 4
Kogej P, Jezersek M, Mozina J, Babnik A (2015) Apparatus and method for writing a pattern in a substrate. EU Patent 2,714,414, October 7
Nagy E, Mertinger V, Tranta F, Sólyom J (2004) Deformation induced martensitic transformation in stainless steels. Mater Sci Eng A 378:308–313
Mumtaz K, Takahashi S, Echigoya J et al (2004) Magnetic measurements of the reverse martensite to austenite transformation in a rolled austenitic stainless steel. J Mater Sci 39:1997–2010
Leskovšek V, Godec M, Kogej P (2014) Strengthening via the formation of strain-induced martensite and the effects of laser marking on the microstructure of austenitic stainless steel. Metall Mater Trans A 45:2819–2826
Steen WM, Mazumder J (2010) Laser material processing. Springer London, London
Kannatey-Asibu E (2009) Principles of laser materials processing. John Willey & Sons, Inc
Farshidianfar MH, Khajepour A, Gerlich A (2015) Real-time control of microstructure in laser additive manufacturing. Int J Adv Manuf Technol 82:1173–1186
Mrňa L, Šarbort M, Řeřucha Š, Jedlička P (2012) Feedback control of laser welding based on frequency analysis of light emissions and adaptive beam shaping. Phys Procedia 39:784–791
Hofman JT, Pathiraj B, van Dijk J et al (2012) A camera based feedback control strategy for the laser cladding process. J Mater Process Technol 212:2455–2462
Ziegler JG, Nichols NB (1942) Optimum settings for automatic controllers. Trans ASME:759–768
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Pogačar, M., Kogej, P., Možina, J. et al. Adaptive laser-based local transformations of the magnetic properties in austenitic stainless steel using optical feedback. Int J Adv Manuf Technol 91, 3225–3231 (2017). https://doi.org/10.1007/s00170-017-9997-6
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DOI: https://doi.org/10.1007/s00170-017-9997-6