Laser‐induced reversion of
precipitates in an Al‐Li alloy: Study on temperature rise in pulsed laser atom probe |
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| Authors: | Muna Khushaim Ryota Gemma Talaat Al‐Kassab |
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| Affiliation: | 1. Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia;2. Nanofabrication Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia |
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| Abstract: | The influence of tuning the laser pulse energy during the analyses on the resulting microstructure in a specimen utilizing an ultra‐fast laser assisted atom probe was demonstrated by a case study of a binary Al‐Li alloy. The decomposition parameters, such as the size, number density, volume fraction, and composition of  precipitates, were carefully monitored after each analysis. A simple model was employed to estimate the corresponding specimen temperature for each value of the laser energy. The results indicated that the corresponding temperatures for the laser pulse energy in the range of 10 to 80 pJ are located inside the miscibility gap of the binary Al‐Li phase diagram and fall into the metastable equilibrium field. In addition, the corresponding temperature for a laser pulse energy of 100 pJ was in fairly good agreement with reported range of  solvus temperature, suggesting a result of reversion upon heating due to laser pulsing. Microsc. Res. Tech. 79:727–737, 2016. © 2016 Wiley Periodicals, Inc. |
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| Keywords: | Al‐Li alloy precipitates microstructure diffusion laser energy reversion |
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