{"title":"通过原位合成多相陶瓷颗粒改善具有核壳结构的 TiAl 复合材料的热加工性能","authors":"Siying Li, Yupeng Wang, Tengfei Ma, Xiaohong Wang, Duo Dong, Dongdong Zhu, Hongze Fang, Ruirun Chen","doi":"10.1016/j.jmrt.2024.07.031","DOIUrl":null,"url":null,"abstract":"TiAl composite with core-shell structure was in-situ synthesized incorporating BN nanosheets and graphene oxide into TiAl alloy using SPS, and the hot deformation behaviors were subsequently investigated on a Gleeble-1500D thermal simulation machine. The microstructural evolution and the influence of ceramic particles on hot deformation were revealed using OM, SEM, TEM, and EBSD. The results demonstrated a refined microstructure of TiAl composite induced by ceramic particles providing extra nucleation sites for DRX, contributing to lower flow stress, with peak stresses of 387 and 360 MPa for TiAl alloy and TiAl composite deformed at 1200 °C/1s, respectively. Moreover, dislocation slip was inhibited by ceramic particles leading to dislocation pile-up, facilitating the nucleation and growth of DRX at lamellar colony boundaries and α/γ interfaces. Notably, the “shell” composed of TiB and TiAlN nanoparticles coordinated the deformation of lamellar colonies with different orientations, improving the hot workability of TiAl composite.","PeriodicalId":501120,"journal":{"name":"Journal of Materials Research and Technology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improved hot workability of TiAl composite with core-shell structure via in-situ synthesized multi-phases ceramic particles\",\"authors\":\"Siying Li, Yupeng Wang, Tengfei Ma, Xiaohong Wang, Duo Dong, Dongdong Zhu, Hongze Fang, Ruirun Chen\",\"doi\":\"10.1016/j.jmrt.2024.07.031\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"TiAl composite with core-shell structure was in-situ synthesized incorporating BN nanosheets and graphene oxide into TiAl alloy using SPS, and the hot deformation behaviors were subsequently investigated on a Gleeble-1500D thermal simulation machine. The microstructural evolution and the influence of ceramic particles on hot deformation were revealed using OM, SEM, TEM, and EBSD. The results demonstrated a refined microstructure of TiAl composite induced by ceramic particles providing extra nucleation sites for DRX, contributing to lower flow stress, with peak stresses of 387 and 360 MPa for TiAl alloy and TiAl composite deformed at 1200 °C/1s, respectively. Moreover, dislocation slip was inhibited by ceramic particles leading to dislocation pile-up, facilitating the nucleation and growth of DRX at lamellar colony boundaries and α/γ interfaces. Notably, the “shell” composed of TiB and TiAlN nanoparticles coordinated the deformation of lamellar colonies with different orientations, improving the hot workability of TiAl composite.\",\"PeriodicalId\":501120,\"journal\":{\"name\":\"Journal of Materials Research and Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Research and Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1016/j.jmrt.2024.07.031\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Research and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1016/j.jmrt.2024.07.031","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
利用 SPS 原位合成了具有核壳结构的 TiAl 复合材料,并在 TiAl 合金中加入了 BN 纳米片和氧化石墨烯,随后在 Gleeble-1500D 热模拟机上研究了热变形行为。利用光学显微镜、扫描电镜、电子显微镜和 EBSD 揭示了微观结构的演变以及陶瓷颗粒对热变形的影响。结果表明,由于陶瓷颗粒为 DRX 提供了额外的成核点,TiAl 复合材料的微观结构得到了细化,从而降低了流动应力,在 1200 °C/1s 下变形的 TiAl 合金和 TiAl 复合材料的峰值应力分别为 387 和 360 MPa。此外,陶瓷颗粒抑制了位错滑移,导致位错堆积,促进了 DRX 在片状菌落边界和 α/γ 界面的成核和生长。值得注意的是,由 TiB 和 TiAlN 纳米粒子组成的 "壳 "协调了不同取向的片状菌落的变形,改善了 TiAl 复合材料的热加工性能。
Improved hot workability of TiAl composite with core-shell structure via in-situ synthesized multi-phases ceramic particles
TiAl composite with core-shell structure was in-situ synthesized incorporating BN nanosheets and graphene oxide into TiAl alloy using SPS, and the hot deformation behaviors were subsequently investigated on a Gleeble-1500D thermal simulation machine. The microstructural evolution and the influence of ceramic particles on hot deformation were revealed using OM, SEM, TEM, and EBSD. The results demonstrated a refined microstructure of TiAl composite induced by ceramic particles providing extra nucleation sites for DRX, contributing to lower flow stress, with peak stresses of 387 and 360 MPa for TiAl alloy and TiAl composite deformed at 1200 °C/1s, respectively. Moreover, dislocation slip was inhibited by ceramic particles leading to dislocation pile-up, facilitating the nucleation and growth of DRX at lamellar colony boundaries and α/γ interfaces. Notably, the “shell” composed of TiB and TiAlN nanoparticles coordinated the deformation of lamellar colonies with different orientations, improving the hot workability of TiAl composite.