{"title":"痕量 B 对添加剂制造的近β钛合金 Ti55531 显微结构和力学性能的影响","authors":"Hanlin Ding, Lilin Wang, Lukai Yuan, Xin Lin, Weidong Huang","doi":"10.1002/adem.202401241","DOIUrl":null,"url":null,"abstract":"The refinement of β grains is an effective approach to optimize the grain boundary α phase and enhance the mechanical properties for laser‐directed energy deposited (L‐DED) titanium alloys. In this study, the primary β grain size is refined by adding 0.05 and 0.10 wt% boron in Ti55531, respectively. It was found that the addition of trace boron can not only reduce the primary β grain size during molten pool solidification process, but also can suppress the primary β grain coarsening during in‐situ thermal cycling process. The Ti55531 + 0.05B alloy exhibited higher strength and elongation. This is attributed to the enhanced coordinated deformation ability resulting from the refined β grains and little harmful effect resulting from the presence of needle TiB. In contrast, when the boron content increased to 0.10 wt%, the harmful effect of excessive TiB whiskers at the grain boundaries outweighed the favorable effect of the further β grain refinement, which leads to the decrease in plasticity. This study suggests that an appropriate boron content added can refine primary β grain significantly and meanwhile avoid too much TiB precipitation, achieving superior comprehensive mechanical properties for additive manufacturing near β titanium alloy.","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Trace B on Microstructure and Mechanical Properties of Additive Manufactured Near β Titanium Alloy Ti55531\",\"authors\":\"Hanlin Ding, Lilin Wang, Lukai Yuan, Xin Lin, Weidong Huang\",\"doi\":\"10.1002/adem.202401241\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The refinement of β grains is an effective approach to optimize the grain boundary α phase and enhance the mechanical properties for laser‐directed energy deposited (L‐DED) titanium alloys. In this study, the primary β grain size is refined by adding 0.05 and 0.10 wt% boron in Ti55531, respectively. It was found that the addition of trace boron can not only reduce the primary β grain size during molten pool solidification process, but also can suppress the primary β grain coarsening during in‐situ thermal cycling process. The Ti55531 + 0.05B alloy exhibited higher strength and elongation. This is attributed to the enhanced coordinated deformation ability resulting from the refined β grains and little harmful effect resulting from the presence of needle TiB. In contrast, when the boron content increased to 0.10 wt%, the harmful effect of excessive TiB whiskers at the grain boundaries outweighed the favorable effect of the further β grain refinement, which leads to the decrease in plasticity. This study suggests that an appropriate boron content added can refine primary β grain significantly and meanwhile avoid too much TiB precipitation, achieving superior comprehensive mechanical properties for additive manufacturing near β titanium alloy.\",\"PeriodicalId\":7275,\"journal\":{\"name\":\"Advanced Engineering Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2024-08-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Engineering Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/adem.202401241\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Engineering Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/adem.202401241","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Effect of Trace B on Microstructure and Mechanical Properties of Additive Manufactured Near β Titanium Alloy Ti55531
The refinement of β grains is an effective approach to optimize the grain boundary α phase and enhance the mechanical properties for laser‐directed energy deposited (L‐DED) titanium alloys. In this study, the primary β grain size is refined by adding 0.05 and 0.10 wt% boron in Ti55531, respectively. It was found that the addition of trace boron can not only reduce the primary β grain size during molten pool solidification process, but also can suppress the primary β grain coarsening during in‐situ thermal cycling process. The Ti55531 + 0.05B alloy exhibited higher strength and elongation. This is attributed to the enhanced coordinated deformation ability resulting from the refined β grains and little harmful effect resulting from the presence of needle TiB. In contrast, when the boron content increased to 0.10 wt%, the harmful effect of excessive TiB whiskers at the grain boundaries outweighed the favorable effect of the further β grain refinement, which leads to the decrease in plasticity. This study suggests that an appropriate boron content added can refine primary β grain significantly and meanwhile avoid too much TiB precipitation, achieving superior comprehensive mechanical properties for additive manufacturing near β titanium alloy.
期刊介绍:
Advanced Engineering Materials is the membership journal of three leading European Materials Societies
- German Materials Society/DGM,
- French Materials Society/SF2M,
- Swiss Materials Federation/SVMT.