Yating Qiu , Tian Yang , Hankun Zhu , Wei Han , Koji Sugioka , Lingbao Kong
{"title":"石英玻璃 LPBF 中的动态行为和缺陷控制：VOF 模型模拟的启示","authors":"Yating Qiu , Tian Yang , Hankun Zhu , Wei Han , Koji Sugioka , Lingbao Kong","doi":"10.1016/j.powtec.2024.120450","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates laser powder bed fusion (LPBF) applied to quartz glass powder through numerical simulations using the Volume of Fluid (VOF) model. A comprehensive LPBF model was developed to explore dynamic processes and defect formations. The influence of LPBF parameters on solidification quality was quantitatively analyzed, categorizing melting and solidification into four distinct types. Key results include a quantified heat-affected depth of 110 μm and a partial melting depth of 27 μm. The study also identifies keyhole-induced porosity, driven by asymmetry in keyhole geometry, recoil pressure, surface tension, and gravity, and presents two distinct bubble dynamics along with spattering phenomena. Multi-track scanning simulations revealed that preheating from initial tracks improves subsequent track quality by reducing defects. The results highlight the longer duration required to stabilize the molten pool in quartz glass compared to metals, providing valuable insights into parameter optimization for LPBF of quartz glass.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"451 ","pages":"Article 120450"},"PeriodicalIF":4.5000,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dynamic behavior and defect control in LPBF of quartz glass: Insights from VOF model simulations\",\"authors\":\"Yating Qiu , Tian Yang , Hankun Zhu , Wei Han , Koji Sugioka , Lingbao Kong\",\"doi\":\"10.1016/j.powtec.2024.120450\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study investigates laser powder bed fusion (LPBF) applied to quartz glass powder through numerical simulations using the Volume of Fluid (VOF) model. A comprehensive LPBF model was developed to explore dynamic processes and defect formations. The influence of LPBF parameters on solidification quality was quantitatively analyzed, categorizing melting and solidification into four distinct types. Key results include a quantified heat-affected depth of 110 μm and a partial melting depth of 27 μm. The study also identifies keyhole-induced porosity, driven by asymmetry in keyhole geometry, recoil pressure, surface tension, and gravity, and presents two distinct bubble dynamics along with spattering phenomena. Multi-track scanning simulations revealed that preheating from initial tracks improves subsequent track quality by reducing defects. The results highlight the longer duration required to stabilize the molten pool in quartz glass compared to metals, providing valuable insights into parameter optimization for LPBF of quartz glass.</div></div>\",\"PeriodicalId\":407,\"journal\":{\"name\":\"Powder Technology\",\"volume\":\"451 \",\"pages\":\"Article 120450\"},\"PeriodicalIF\":4.5000,\"publicationDate\":\"2024-11-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Powder Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0032591024010945\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591024010945","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Dynamic behavior and defect control in LPBF of quartz glass: Insights from VOF model simulations
This study investigates laser powder bed fusion (LPBF) applied to quartz glass powder through numerical simulations using the Volume of Fluid (VOF) model. A comprehensive LPBF model was developed to explore dynamic processes and defect formations. The influence of LPBF parameters on solidification quality was quantitatively analyzed, categorizing melting and solidification into four distinct types. Key results include a quantified heat-affected depth of 110 μm and a partial melting depth of 27 μm. The study also identifies keyhole-induced porosity, driven by asymmetry in keyhole geometry, recoil pressure, surface tension, and gravity, and presents two distinct bubble dynamics along with spattering phenomena. Multi-track scanning simulations revealed that preheating from initial tracks improves subsequent track quality by reducing defects. The results highlight the longer duration required to stabilize the molten pool in quartz glass compared to metals, providing valuable insights into parameter optimization for LPBF of quartz glass.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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