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- W2897543941 abstract "Short-pulse laser processing is usually referred to as “cold” due to the very high intensities causing a large fraction of the processed material to evaporate. This minimizes the thermal interaction with the remaining material. However, very often recast layers and rims of molten material are observed in metal processing. In the case of CFRP processing much larger heat affected zones are observed than expected from pure heat conduction. Besides plasma energy redistribution and scattering the so-called heat accumulation is very often made responsible for such thermal effects.An analytical model was used to describe the process of heat accumulation. It allows estimating the amount of energy which does not contribute to the process itself and remains as heat in the material contributing to a time-averaged temperature increase. The model takes 3-D heat flow into account for different pulse repetition rates and beam profiles.Short-pulse laser processing is usually referred to as “cold” due to the very high intensities causing a large fraction of the processed material to evaporate. This minimizes the thermal interaction with the remaining material. However, very often recast layers and rims of molten material are observed in metal processing. In the case of CFRP processing much larger heat affected zones are observed than expected from pure heat conduction. Besides plasma energy redistribution and scattering the so-called heat accumulation is very often made responsible for such thermal effects.An analytical model was used to describe the process of heat accumulation. It allows estimating the amount of energy which does not contribute to the process itself and remains as heat in the material contributing to a time-averaged temperature increase. The model takes 3-D heat flow into account for different pulse repetition rates and beam profiles." @default.
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- W2897543941 date "2012-01-01" @default.
- W2897543941 modified "2023-09-27" @default.
- W2897543941 title "Heat accumulation in short-pulse laser processing of CFRP" @default.
- W2897543941 doi "https://doi.org/10.2351/1.5062379" @default.
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