{"title":"激光能量密度对激光金属沉积制备AlMo0.5NbTa0.5TiZr的密度、表面形貌和微观结构的影响","authors":"Bingbing Sun, Bingqing Chen, Junjie Gao, Feng Zhang, Lingti Kong, Jinfu Li","doi":"10.1007/s00339-025-08923-y","DOIUrl":null,"url":null,"abstract":"<div><p>The low-density refractory high-entropy alloy AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr exhibits excellent high-temperature performance, making it an effective substitute for nickel-based superalloys, with potential applications in high-temperature aerospace components. In this study, bulk AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr refractory high-entropy alloy samples are prepared by laser metal deposition (LMD). The effects of laser energy density on the density, surface morphology, and microstructure of AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr are analyzed, elucidating the LMD formation mechanism of this alloy. The results indicate that optimizing the laser energy density improves the density of the LMD-formed AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr refractory high-entropy alloy. As the laser energy density increased to 102 J/mm², the cellular crystals and columnar dendrites coarsen. Significant changes in the concentrations of Al and Zr elements result in the formation of four typical regions in the LMD-formed AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr: the LP region rich in the Al<sub>3</sub>Zr<sub>4</sub> phase, the DR region rich in Mo-Nb-Ta (BCC-1 phase), and the FR and ID regions rich in Al-Zr-Ti (BCC-2 phase).</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 10","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of laser energy density on the density, surface morphology, and microstructure of AlMo0.5NbTa0.5TiZr fabricated by laser metal deposition\",\"authors\":\"Bingbing Sun, Bingqing Chen, Junjie Gao, Feng Zhang, Lingti Kong, Jinfu Li\",\"doi\":\"10.1007/s00339-025-08923-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The low-density refractory high-entropy alloy AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr exhibits excellent high-temperature performance, making it an effective substitute for nickel-based superalloys, with potential applications in high-temperature aerospace components. In this study, bulk AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr refractory high-entropy alloy samples are prepared by laser metal deposition (LMD). The effects of laser energy density on the density, surface morphology, and microstructure of AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr are analyzed, elucidating the LMD formation mechanism of this alloy. The results indicate that optimizing the laser energy density improves the density of the LMD-formed AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr refractory high-entropy alloy. As the laser energy density increased to 102 J/mm², the cellular crystals and columnar dendrites coarsen. Significant changes in the concentrations of Al and Zr elements result in the formation of four typical regions in the LMD-formed AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr: the LP region rich in the Al<sub>3</sub>Zr<sub>4</sub> phase, the DR region rich in Mo-Nb-Ta (BCC-1 phase), and the FR and ID regions rich in Al-Zr-Ti (BCC-2 phase).</p></div>\",\"PeriodicalId\":473,\"journal\":{\"name\":\"Applied Physics A\",\"volume\":\"131 10\",\"pages\":\"\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2025-09-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Physics A\",\"FirstCategoryId\":\"4\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00339-025-08923-y\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics A","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1007/s00339-025-08923-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
低密度难熔高熵合金AlMo0.5NbTa0.5TiZr具有优异的高温性能，是镍基高温合金的有效替代品，在高温航空航天部件中具有潜在的应用前景。本研究采用激光金属沉积（LMD）法制备了AlMo0.5NbTa0.5TiZr难熔高熵合金块体样品。分析了激光能量密度对AlMo0.5NbTa0.5TiZr合金密度、表面形貌和显微组织的影响，阐明了该合金LMD的形成机理。结果表明，优化激光能量密度可提高lmd成形AlMo0.5NbTa0.5TiZr难熔高熵合金的密度。当激光能量密度增加到102 J/mm²时，细胞晶体和柱状枝晶变粗。Al和Zr元素浓度的显著变化导致lmd形成的AlMo0.5NbTa0.5TiZr中形成了四个典型区域：富含Al3Zr4相的LP区，富含Mo-Nb-Ta （BCC-1相）的DR区，以及富含Al-Zr- ti （BCC-2相）的FR和ID区。
Effects of laser energy density on the density, surface morphology, and microstructure of AlMo0.5NbTa0.5TiZr fabricated by laser metal deposition
The low-density refractory high-entropy alloy AlMo0.5NbTa0.5TiZr exhibits excellent high-temperature performance, making it an effective substitute for nickel-based superalloys, with potential applications in high-temperature aerospace components. In this study, bulk AlMo0.5NbTa0.5TiZr refractory high-entropy alloy samples are prepared by laser metal deposition (LMD). The effects of laser energy density on the density, surface morphology, and microstructure of AlMo0.5NbTa0.5TiZr are analyzed, elucidating the LMD formation mechanism of this alloy. The results indicate that optimizing the laser energy density improves the density of the LMD-formed AlMo0.5NbTa0.5TiZr refractory high-entropy alloy. As the laser energy density increased to 102 J/mm², the cellular crystals and columnar dendrites coarsen. Significant changes in the concentrations of Al and Zr elements result in the formation of four typical regions in the LMD-formed AlMo0.5NbTa0.5TiZr: the LP region rich in the Al3Zr4 phase, the DR region rich in Mo-Nb-Ta (BCC-1 phase), and the FR and ID regions rich in Al-Zr-Ti (BCC-2 phase).
期刊介绍：
Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.
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