{ "types" : { "Bookmark" : { "pluralLabel" : "Bookmarks" }, "Publication" : { "pluralLabel" : "Publications" }, "GoldStandardPublication" : { "pluralLabel" : "GoldStandardPublications" }, "GoldStandardBookmark" : { "pluralLabel" : "GoldStandardBookmarks" }, "Tag" : { "pluralLabel" : "Tags" }, "User" : { "pluralLabel" : "Users" }, "Group" : { "pluralLabel" : "Groups" }, "Sphere" : { "pluralLabel" : "Spheres" } }, "properties" : { "count" : { "valueType" : "number" }, "date" : { "valueType" : "date" }, "changeDate" : { "valueType" : "date" }, "url" : { "valueType" : "url" }, "id" : { "valueType" : "url" }, "tags" : { "valueType" : "item" }, "user" : { "valueType" : "item" } }, "items" : [ { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2d63f180b4596242147af20fc8c3909ff/jmichel", "tags" : [ "Ablation","AdditiveManufacturing","AlSi10Mg","Heat-dissipatingStructures","Microstructure","PBF-LB/M","Simulation","Solidification","UltrashortPulse","myown" ], "intraHash" : "d63f180b4596242147af20fc8c3909ff", "interHash" : "65b5dae017fa6d9aac205df60afb2244", "label" : "Adjusting the microstructure of additively manufactured parts with tailored temperature fields by the combination of powder bed fusion with cw-laser and ablation with ultrashort laser pulses", "user" : "jmichel", "description" : "", "date" : "2024-05-08 21:09:02", "changeDate" : "2024-05-08 21:09:02", "count" : 4, "pub-type": "presentation", "publisher":"SPIE", "year": "2024", "url": "", "author": [ "Johannes Michel","Nico Ulff","Manuel Henn","Brian Simonds","Peter Hosemann","Frederik Zanger","Christian Hagenlocher","Thomas Graf" ], "authors": [ {"first" : "Johannes", "last" : "Michel"}, {"first" : "Nico", "last" : "Ulff"}, {"first" : "Manuel", "last" : "Henn"}, {"first" : "Brian", "last" : "Simonds"}, {"first" : "Peter", "last" : "Hosemann"}, {"first" : "Frederik", "last" : "Zanger"}, {"first" : "Christian", "last" : "Hagenlocher"}, {"first" : "Thomas", "last" : "Graf"} ], "editor": [ "Bo Gu","Hongqiang Chen" ], "editors": [ {"first" : "Bo", "last" : "Gu"}, {"first" : "Hongqiang", "last" : "Chen"} ], "eventtitle" : "LASE Photonics West", "venue" : "San Francisco, California, United States", "language" : "english", "eventdate" : "31 January", "bibtexKey": "michel2024adjusting" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2d63f180b4596242147af20fc8c3909ff/ifsw", "tags" : [ "Heat-dissipatingStructures","myown","PBF-LB/M","Ablation","Solidification","Simulation","AdditiveManufacturing","AlSi10Mg","UltrashortPulse","Microstructure" ], "intraHash" : "d63f180b4596242147af20fc8c3909ff", "interHash" : "65b5dae017fa6d9aac205df60afb2244", "label" : "Adjusting the microstructure of additively manufactured parts with tailored temperature fields by the combination of powder bed fusion with cw-laser and ablation with ultrashort laser pulses", "user" : "ifsw", "description" : "", "date" : "2024-05-08 21:09:02", "changeDate" : "2024-05-08 21:09:02", "count" : 4, "pub-type": "presentation", "publisher":"SPIE", "year": "2024", "url": "", "author": [ "Johannes Michel","Nico Ulff","Manuel Henn","Brian Simonds","Peter Hosemann","Frederik Zanger","Christian Hagenlocher","Thomas Graf" ], "authors": [ {"first" : "Johannes", "last" : "Michel"}, {"first" : "Nico", "last" : "Ulff"}, {"first" : "Manuel", "last" : "Henn"}, {"first" : "Brian", "last" : "Simonds"}, {"first" : "Peter", "last" : "Hosemann"}, {"first" : "Frederik", "last" : "Zanger"}, {"first" : "Christian", "last" : "Hagenlocher"}, {"first" : "Thomas", "last" : "Graf"} ], "editor": [ "Bo Gu","Hongqiang Chen" ], "editors": [ {"first" : "Bo", "last" : "Gu"}, {"first" : "Hongqiang", "last" : "Chen"} ], "eventtitle" : "LASE Photonics West", "venue" : "San Francisco, California, United States", "language" : "english", "eventdate" : "31 January", "bibtexKey": "michel2024adjusting" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2c47506f57bff71e5a4b18dd91640762f/jmichel", "tags" : [ "Ablation","AdditiveManufacturing","AlSi10Mg","Heat-dissipatingStructures","Microstructure","PBF-LB/M","Simulation","Solidification","UltrashortPulse","myown" ], "intraHash" : "c47506f57bff71e5a4b18dd91640762f", "interHash" : "65b5dae017fa6d9aac205df60afb2244", "label" : "Adjusting the microstructure of additively manufactured parts with tailored temperature fields by the combination of powder bed fusion with cw-laser and ablation with ultrashort laser pulses", "user" : "jmichel", "description" : "", "date" : "2024-05-08 20:35:51", "changeDate" : "2024-05-08 21:04:50", "count" : 4, "pub-type": "inproceedings", "booktitle": "Laser 3D Manufacturing XI","series": "Proc. SPIE","publisher":"SPIE", "year": "2024", "url": "http://dx.doi.org/10.1117/12.3002302", "author": [ "Johannes Michel","Nico Ulff","Manuel Henn","Brian Simonds","Peter Hosemann","Frederik Zanger","Christian Hagenlocher","Thomas Graf" ], "authors": [ {"first" : "Johannes", "last" : "Michel"}, {"first" : "Nico", "last" : "Ulff"}, {"first" : "Manuel", "last" : "Henn"}, {"first" : "Brian", "last" : "Simonds"}, {"first" : "Peter", "last" : "Hosemann"}, {"first" : "Frederik", "last" : "Zanger"}, {"first" : "Christian", "last" : "Hagenlocher"}, {"first" : "Thomas", "last" : "Graf"} ], "editor": [ "Bo Gu","Hongqiang Chen" ], "editors": [ {"first" : "Bo", "last" : "Gu"}, {"first" : "Hongqiang", "last" : "Chen"} ], "volume": "12876","abstract": "In powder bed fusion with laser beams (PBF-LB/M), the component's quality and mechanical properties are limited by \r\nrestricted process parameter combinations and the geometry of the component. Combining PBF-LB/M with ultrashort laser \r\nablation enables additional control of the heat flow to adjust local solidification. On the one hand it is possible to print \r\nheat-dissipating structures, which can be added and removed during the build process. On the other hand, ablated slits in \r\nthe component can serve as a thermal barrier.\r\nTo investigate the effect of slits and heat-dissipation structures on the local temperature field and solidification conditions, \r\na numerical model was developed. Two different ablation strategies were investigated and compared to conventional \r\nPBF-LB. Numerical investigations of an additively manufactured AlSi10Mg component showed a larger melt pool, a lower \r\ntemperature gradient, and a lower cooling rate if there are slits present next to the current PBF-LB track.\r\nThis approach provides the potential to independently adjust microstructure and mechanical properties, exceeding \r\nlimitations imposed by the component's geometry in conventional additive manufacturing.", "venue" : "San Francisco, California, United States", "language" : "english", "eventdate" : "27 January - 1 February 2024", "eventtitle" : "LASE Photonics West", "doi" : "10.1117/12.3002302", "bibtexKey": "Michel_2024" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2c47506f57bff71e5a4b18dd91640762f/ifsw", "tags" : [ "Heat-dissipatingStructures","myown","Heat-dissipatinStructures","PBF-LB/M","Heat-dissipating","Ablation","Solidification","USP","with","Simulation","Additive","AdditiveManufacturing","of","AlSi10Mg","field","structures","UltrashortPulse","manufacturing","Microstructure","temperature" ], "intraHash" : "c47506f57bff71e5a4b18dd91640762f", "interHash" : "65b5dae017fa6d9aac205df60afb2244", "label" : "Adjusting the microstructure of additively manufactured parts with tailored temperature fields by the combination of powder bed fusion with cw-laser and ablation with ultrashort laser pulses", "user" : "ifsw", "description" : "", "date" : "2024-05-08 20:35:51", "changeDate" : "2024-05-08 21:04:50", "count" : 4, "pub-type": "inproceedings", "booktitle": "Laser 3D Manufacturing XI","series": "Proc. SPIE","publisher":"SPIE", "year": "2024", "url": "http://dx.doi.org/10.1117/12.3002302", "author": [ "Johannes Michel","Nico Ulff","Manuel Henn","Brian Simonds","Peter Hosemann","Frederik Zanger","Christian Hagenlocher","Thomas Graf" ], "authors": [ {"first" : "Johannes", "last" : "Michel"}, {"first" : "Nico", "last" : "Ulff"}, {"first" : "Manuel", "last" : "Henn"}, {"first" : "Brian", "last" : "Simonds"}, {"first" : "Peter", "last" : "Hosemann"}, {"first" : "Frederik", "last" : "Zanger"}, {"first" : "Christian", "last" : "Hagenlocher"}, {"first" : "Thomas", "last" : "Graf"} ], "editor": [ "Bo Gu","Hongqiang Chen" ], "editors": [ {"first" : "Bo", "last" : "Gu"}, {"first" : "Hongqiang", "last" : "Chen"} ], "volume": "12876","abstract": "In powder bed fusion with laser beams (PBF-LB/M), the component's quality and mechanical properties are limited by \r\nrestricted process parameter combinations and the geometry of the component. Combining PBF-LB/M with ultrashort laser \r\nablation enables additional control of the heat flow to adjust local solidification. On the one hand it is possible to print \r\nheat-dissipating structures, which can be added and removed during the build process. On the other hand, ablated slits in \r\nthe component can serve as a thermal barrier.\r\nTo investigate the effect of slits and heat-dissipation structures on the local temperature field and solidification conditions, \r\na numerical model was developed. Two different ablation strategies were investigated and compared to conventional \r\nPBF-LB. Numerical investigations of an additively manufactured AlSi10Mg component showed a larger melt pool, a lower \r\ntemperature gradient, and a lower cooling rate if there are slits present next to the current PBF-LB track.\r\nThis approach provides the potential to independently adjust microstructure and mechanical properties, exceeding \r\nlimitations imposed by the component's geometry in conventional additive manufacturing.", "venue" : "San Francisco, California, United States", "language" : "english", "eventdate" : "27 January - 1 February 2024", "eventtitle" : "LASE Photonics West", "doi" : "10.1117/12.3002302", "bibtexKey": "Michel_2024" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/215e5f5d5070bc1bef15af5a9548f8de1/timricken", "tags" : [ "FEM","Multi-scale","Solidification","Theory_of_porous_media","phase-field" ], "intraHash" : "15e5f5d5070bc1bef15af5a9548f8de1", "interHash" : "63eebb01c9c455eeb50c9f032274245b", "label" : "Micro-macro modelling of steel solidification: A continuum mechanical, bi-phasic, two-scale model including thermal driven phase transition", "user" : "timricken", "description" : "", "date" : "2019-11-06 16:19:50", "changeDate" : "2019-11-06 15:19:50", "count" : 2, "pub-type": "article", "journal": "GAMM--Mitteilungen", "year": "2017", "url": "", "author": [ "Lukas Moj","Manuel Foppe","Rüdiger Deike","Tim Ricken" ], "authors": [ {"first" : "Lukas", "last" : "Moj"}, {"first" : "Manuel", "last" : "Foppe"}, {"first" : "Rüdiger", "last" : "Deike"}, {"first" : "Tim", "last" : "Ricken"} ], "volume": "40","number": "2","pages": "125--137","abstract": "This paper addresses a continuum-mechanical, bi-phasic, two-scale numerical model for casting and processing of metallic alloys. The solid and liquid physical states, which represents the solid and molten alloy, are formulated in the framework of the theory of porous media (TPM) including thermal coupling, finite plasticity superimposed by a secondary power creep law and visco-elasticity associated by Darcy's permeability for the solid and the liquid phase, respectively. In view of phase transition during solidification, a two-scale approach considering the phase-field on the micro-scale is proposed, where a double-well potential with two local minima for completely solid and liquid physical states is utilized. The finite element method based on the standard Gallerkin element formulation and the finite difference method was employed for the macro-scale and the micro-scale, respectively. Finally, the performance of the discussed model is demonstrated by the recalculation and validation of a solidification experiment.", "file" : "7a4151c7-99f4-41de-ab7b-4878e66d9e91:C\\:\\\\Users\\\\ac130180\\\\AppData\\Łocal\\\\Swiss Academic Software\\\\Citavi 6\\\\ProjectCache\\\\bkyd3fzxdr3rziq0dosvpq10u8ycyepwckx0sx\\\\Citavi Attachments\\\\7a4151c7-99f4-41de-ab7b-4878e66d9e91.pdf:pdf", "issn" : "1522-2608", "doi" : "10.1002/gamm.201720004", "bibtexKey": "Moj.2017" } ] }