基于凝固模型的选区激光熔化IN718微观组织研究
TG111.4; IN718 合金在选区激光熔化(selective laser melting,SLM)过程中,不同的工艺参数会对其微观组织产生显著影响.为分析工艺参数和微观组织的相互关系,通过凝固模型建立了一次枝晶间距(primary dendrite arm spacing,PDAS)与工艺参数之间的关系并通过实验验证了模型的准确性.计算结果与实验结果均表明:当激光功率提高时,PDAS随之增加;而扫描速度与扫描间距增加时,PDAS随之减小;从熔池底部至顶部,PDAS呈逐渐增加的趋势,同时熔池顶部对工艺参数的变化较为敏感,而中部与底部相对迟钝.研究结果对IN718 合金的微观组织调控具有一...
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| Published in | 西北工业大学学报 Vol. 42; no. 6; pp. 1063 - 1070 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
苏州匀晶金属科技有限公司,江苏 苏州 215024
01.12.2024
西北工业大学 凝固技术国家重点实验室,陕西 西安 710072%西北工业大学 凝固技术国家重点实验室,陕西 西安 710072 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-2758 |
| DOI | 10.1051/jnwpu/20244261063 |
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| Abstract | TG111.4; IN718 合金在选区激光熔化(selective laser melting,SLM)过程中,不同的工艺参数会对其微观组织产生显著影响.为分析工艺参数和微观组织的相互关系,通过凝固模型建立了一次枝晶间距(primary dendrite arm spacing,PDAS)与工艺参数之间的关系并通过实验验证了模型的准确性.计算结果与实验结果均表明:当激光功率提高时,PDAS随之增加;而扫描速度与扫描间距增加时,PDAS随之减小;从熔池底部至顶部,PDAS呈逐渐增加的趋势,同时熔池顶部对工艺参数的变化较为敏感,而中部与底部相对迟钝.研究结果对IN718 合金的微观组织调控具有一定的指导意义. |
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| AbstractList | TG111.4; IN718 合金在选区激光熔化(selective laser melting,SLM)过程中,不同的工艺参数会对其微观组织产生显著影响.为分析工艺参数和微观组织的相互关系,通过凝固模型建立了一次枝晶间距(primary dendrite arm spacing,PDAS)与工艺参数之间的关系并通过实验验证了模型的准确性.计算结果与实验结果均表明:当激光功率提高时,PDAS随之增加;而扫描速度与扫描间距增加时,PDAS随之减小;从熔池底部至顶部,PDAS呈逐渐增加的趋势,同时熔池顶部对工艺参数的变化较为敏感,而中部与底部相对迟钝.研究结果对IN718 合金的微观组织调控具有一定的指导意义. |
| Abstract_FL | During the selective laser melting(SLM)process of IN718,different process parameters have a signifi-cant impact on its microstructure.To analyze the interrelationship between process parameters and microstructure,in this study,the relationship between primary dendrite arm spacing(PDAS)and process parameters was estab-lished through a solidification model,and the accuracy of the model was verified through experiments.Both the cal-culation results and the experimental results show that when the laser power increases,PDAS increases accordingly;while as the scanning speed and hatch distance increase,PDAS decreases accordingly;and from the bottom to the top of the molten pool,PDAS gradually increases.At the same time,the top of the molten pool is more sensitive to the change of process parameters,while the middle and bottom are relatively insensitive.These re-search results are of certain guiding significance for the microstructure regulation of IN718. |
| Author | 万杰 徐伟 陈豫增 |
| AuthorAffiliation | 西北工业大学 凝固技术国家重点实验室,陕西 西安 710072%西北工业大学 凝固技术国家重点实验室,陕西 西安 710072;苏州匀晶金属科技有限公司,江苏 苏州 215024 |
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| Author_FL | XU Wei WAN Jie CHEN Yuzeng |
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| DocumentTitle_FL | Study on the microstructures of SLM IN718 based on solidification model |
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| Keywords | IN718 工艺参数 PDAS 凝固模型 process parameter solidification model |
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| Snippet | TG111.4; IN718 合金在选区激光熔化(selective laser melting,SLM)过程中,不同的工艺参数会对其微观组织产生显著影响.为分析工艺参数和微观组织的相互关系,通过凝固模型建立了一次枝晶间距(primary dendrite arm... |
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| Title | 基于凝固模型的选区激光熔化IN718微观组织研究 |
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