Daniel Ahlin Heikkinen Wartacz , Till Höschen , Johann Riesch , Karen Pantleon , Wolfgang Pantleon
{"title":"多纤维钨纤维增强钨复合材料高温退火后的热稳定性及其机械完整性","authors":"Daniel Ahlin Heikkinen Wartacz , Till Höschen , Johann Riesch , Karen Pantleon , Wolfgang Pantleon","doi":"10.1016/j.fusengdes.2025.115438","DOIUrl":null,"url":null,"abstract":"<div><div>Tungsten is the material of choice for plasma-facing components in future fusion reactors due to its high melting point, good thermal conductivity and strength. The brittleness of tungsten at temperatures below its brittle-to-ductile transition, however, is still a challenge. The development of tungsten fiber-reinforced tungsten (W<span><math><msub><mrow></mrow><mrow><mi>f</mi></mrow></msub></math></span>/W) composites aims to mitigate tungsten’s brittleness by achieving pseudo-ductility. Despite advancements, the high heat fluxes in future fusion reactors pose a risk for deteriorating the otherwise improved mechanical properties of W<span><math><msub><mrow></mrow><mrow><mi>f</mi></mrow></msub></math></span>/W composites due to restoration processes in the microstructure occurring at high operation temperatures. This study focuses on assessing the microstructural evolution at 1450 °C and the integrity of the mechanical properties of a W<span><math><msub><mrow></mrow><mrow><mi>f</mi></mrow></msub></math></span>/W composite after annealing for 2 days. Mechanical performance is assessed by three-point bending tests according to ASTM E399-23. The results show degradation of the pseudo-ductile behavior, even if some pseudo-ductility is still preserved. Microstructural investigation by electron backscatter diffraction (ESBD) shows remarkable differences between the microstructure evolution in individual fibers during annealing.</div></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"222 ","pages":"Article 115438"},"PeriodicalIF":2.0000,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Thermal stability of multi-fiber tungsten fiber-reinforced tungsten composites and their mechanical integrity after high temperature annealing\",\"authors\":\"Daniel Ahlin Heikkinen Wartacz , Till Höschen , Johann Riesch , Karen Pantleon , Wolfgang Pantleon\",\"doi\":\"10.1016/j.fusengdes.2025.115438\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Tungsten is the material of choice for plasma-facing components in future fusion reactors due to its high melting point, good thermal conductivity and strength. The brittleness of tungsten at temperatures below its brittle-to-ductile transition, however, is still a challenge. The development of tungsten fiber-reinforced tungsten (W<span><math><msub><mrow></mrow><mrow><mi>f</mi></mrow></msub></math></span>/W) composites aims to mitigate tungsten’s brittleness by achieving pseudo-ductility. Despite advancements, the high heat fluxes in future fusion reactors pose a risk for deteriorating the otherwise improved mechanical properties of W<span><math><msub><mrow></mrow><mrow><mi>f</mi></mrow></msub></math></span>/W composites due to restoration processes in the microstructure occurring at high operation temperatures. This study focuses on assessing the microstructural evolution at 1450 °C and the integrity of the mechanical properties of a W<span><math><msub><mrow></mrow><mrow><mi>f</mi></mrow></msub></math></span>/W composite after annealing for 2 days. Mechanical performance is assessed by three-point bending tests according to ASTM E399-23. The results show degradation of the pseudo-ductile behavior, even if some pseudo-ductility is still preserved. Microstructural investigation by electron backscatter diffraction (ESBD) shows remarkable differences between the microstructure evolution in individual fibers during annealing.</div></div>\",\"PeriodicalId\":55133,\"journal\":{\"name\":\"Fusion Engineering and Design\",\"volume\":\"222 \",\"pages\":\"Article 115438\"},\"PeriodicalIF\":2.0000,\"publicationDate\":\"2025-09-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Fusion Engineering and Design\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0920379625006349\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"NUCLEAR SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fusion Engineering and Design","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0920379625006349","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Thermal stability of multi-fiber tungsten fiber-reinforced tungsten composites and their mechanical integrity after high temperature annealing
Tungsten is the material of choice for plasma-facing components in future fusion reactors due to its high melting point, good thermal conductivity and strength. The brittleness of tungsten at temperatures below its brittle-to-ductile transition, however, is still a challenge. The development of tungsten fiber-reinforced tungsten (W/W) composites aims to mitigate tungsten’s brittleness by achieving pseudo-ductility. Despite advancements, the high heat fluxes in future fusion reactors pose a risk for deteriorating the otherwise improved mechanical properties of W/W composites due to restoration processes in the microstructure occurring at high operation temperatures. This study focuses on assessing the microstructural evolution at 1450 °C and the integrity of the mechanical properties of a W/W composite after annealing for 2 days. Mechanical performance is assessed by three-point bending tests according to ASTM E399-23. The results show degradation of the pseudo-ductile behavior, even if some pseudo-ductility is still preserved. Microstructural investigation by electron backscatter diffraction (ESBD) shows remarkable differences between the microstructure evolution in individual fibers during annealing.
期刊介绍:
The journal accepts papers about experiments (both plasma and technology), theory, models, methods, and designs in areas relating to technology, engineering, and applied science aspects of magnetic and inertial fusion energy. Specific areas of interest include: MFE and IFE design studies for experiments and reactors; fusion nuclear technologies and materials, including blankets and shields; analysis of reactor plasmas; plasma heating, fuelling, and vacuum systems; drivers, targets, and special technologies for IFE, controls and diagnostics; fuel cycle analysis and tritium reprocessing and handling; operations and remote maintenance of reactors; safety, decommissioning, and waste management; economic and environmental analysis of components and systems.