{"title":"选择性激光熔化过程中光束整形效应的建模","authors":"C.E. Protasov, A.V. Gusarov","doi":"10.1016/j.piutam.2017.06.015","DOIUrl":null,"url":null,"abstract":"<div><p>The influence of the laser-beam radial distribution of the energy flux density is theoretically studied for the Gaussian distribution (mode TEM<sub>00</sub>), and doughnut distribution of TEM<sub>01*</sub> mode for the values of the Peclet number from 0 to 3. The model of linear thermal conduction in the target indicates that profile TEM<sub>00</sub> is the best for thermo-activated treatment processes that can be accomplished in a wide temperature range and profile TEM<sub>01*</sub> can be advantageous for a narrow range of the permissible processing temperature. If the phase transitions of melting/solidification and evaporation are included into the model, the estimate of the width of the laser-treated band is reduced but the tendencies predicted by the linear model are not changed.</p></div>","PeriodicalId":74499,"journal":{"name":"Procedia IUTAM","volume":"23 ","pages":"Pages 147-154"},"PeriodicalIF":0.0000,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.piutam.2017.06.015","citationCount":"0","resultStr":"{\"title\":\"Modeling the Effect of Beam Shaping at Selective Laser Melting\",\"authors\":\"C.E. Protasov, A.V. Gusarov\",\"doi\":\"10.1016/j.piutam.2017.06.015\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The influence of the laser-beam radial distribution of the energy flux density is theoretically studied for the Gaussian distribution (mode TEM<sub>00</sub>), and doughnut distribution of TEM<sub>01*</sub> mode for the values of the Peclet number from 0 to 3. The model of linear thermal conduction in the target indicates that profile TEM<sub>00</sub> is the best for thermo-activated treatment processes that can be accomplished in a wide temperature range and profile TEM<sub>01*</sub> can be advantageous for a narrow range of the permissible processing temperature. If the phase transitions of melting/solidification and evaporation are included into the model, the estimate of the width of the laser-treated band is reduced but the tendencies predicted by the linear model are not changed.</p></div>\",\"PeriodicalId\":74499,\"journal\":{\"name\":\"Procedia IUTAM\",\"volume\":\"23 \",\"pages\":\"Pages 147-154\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.piutam.2017.06.015\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Procedia IUTAM\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2210983817300809\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Procedia IUTAM","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2210983817300809","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Modeling the Effect of Beam Shaping at Selective Laser Melting
The influence of the laser-beam radial distribution of the energy flux density is theoretically studied for the Gaussian distribution (mode TEM00), and doughnut distribution of TEM01* mode for the values of the Peclet number from 0 to 3. The model of linear thermal conduction in the target indicates that profile TEM00 is the best for thermo-activated treatment processes that can be accomplished in a wide temperature range and profile TEM01* can be advantageous for a narrow range of the permissible processing temperature. If the phase transitions of melting/solidification and evaporation are included into the model, the estimate of the width of the laser-treated band is reduced but the tendencies predicted by the linear model are not changed.
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