{"title":"辐照温度对6.4 MeV Fe辐照后W-0.3Cr合金显微组织和硬度的影响","authors":"Jing Wang , Jingxian Sun , Yingying Jia , Yifan Zhang , Yuji Hatano , Diancheng Geng , Katsuya Suzuki , Chang Chen , Laima Luo , Kiyohiro Yabuuchi , Ryuta Kasada","doi":"10.1016/j.matdes.2025.114783","DOIUrl":null,"url":null,"abstract":"<div><div>The W-0.3 at.% Cr alloy samples were irradiated with 6.4 MeV Fe ions at 773, 1073 and 1273 K, and the damage peak was 0.26 dpa. The evolution of the microstructure, defects, and hardness was investigated using grazing-incidence X-ray diffraction (GIXRD), transmission electron microscopy (TEM) and nanoindentation tests. The GIXRD results showed that diffraction peaks shifted towards lower 2θ values, indicating that lattice swelling was caused by irradiation-induced defects after irradiation at elevated temperatures. According to the TEM observations, the size of the dislocation loops remained nearly constant, while their number density decreased with an increase in irradiation temperature. The precipitation of Cr was not observed in the W-0.3Cr alloy after irradiation at 773 K. In contrast, it was significant in the samples irradiated at temperatures of 1073 and 1273 K, showing increases in both the size and number density of the precipitates. Irradiation hardening was observed in all samples, primarily attributed to the presence of dislocation loops. The hardness change was estimated with the dispersion barrier hardening model by taking into account the contributions of dislocation loops and Cr precipitates. The values evaluated with the model were significantly larger than those obtained with the nanoindentation tests. This difference was ascribed to the depletion of solute Cr atoms from the W matrix by precipitation.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114783"},"PeriodicalIF":7.9000,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of irradiation temperature on the microstructure and hardness of W-0.3Cr alloy after irradiation with 6.4 MeV Fe ions\",\"authors\":\"Jing Wang , Jingxian Sun , Yingying Jia , Yifan Zhang , Yuji Hatano , Diancheng Geng , Katsuya Suzuki , Chang Chen , Laima Luo , Kiyohiro Yabuuchi , Ryuta Kasada\",\"doi\":\"10.1016/j.matdes.2025.114783\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The W-0.3 at.% Cr alloy samples were irradiated with 6.4 MeV Fe ions at 773, 1073 and 1273 K, and the damage peak was 0.26 dpa. The evolution of the microstructure, defects, and hardness was investigated using grazing-incidence X-ray diffraction (GIXRD), transmission electron microscopy (TEM) and nanoindentation tests. The GIXRD results showed that diffraction peaks shifted towards lower 2θ values, indicating that lattice swelling was caused by irradiation-induced defects after irradiation at elevated temperatures. According to the TEM observations, the size of the dislocation loops remained nearly constant, while their number density decreased with an increase in irradiation temperature. The precipitation of Cr was not observed in the W-0.3Cr alloy after irradiation at 773 K. In contrast, it was significant in the samples irradiated at temperatures of 1073 and 1273 K, showing increases in both the size and number density of the precipitates. Irradiation hardening was observed in all samples, primarily attributed to the presence of dislocation loops. The hardness change was estimated with the dispersion barrier hardening model by taking into account the contributions of dislocation loops and Cr precipitates. The values evaluated with the model were significantly larger than those obtained with the nanoindentation tests. This difference was ascribed to the depletion of solute Cr atoms from the W matrix by precipitation.</div></div>\",\"PeriodicalId\":383,\"journal\":{\"name\":\"Materials & Design\",\"volume\":\"259 \",\"pages\":\"Article 114783\"},\"PeriodicalIF\":7.9000,\"publicationDate\":\"2025-09-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials & Design\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0264127525012031\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials & Design","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0264127525012031","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Effect of irradiation temperature on the microstructure and hardness of W-0.3Cr alloy after irradiation with 6.4 MeV Fe ions
The W-0.3 at.% Cr alloy samples were irradiated with 6.4 MeV Fe ions at 773, 1073 and 1273 K, and the damage peak was 0.26 dpa. The evolution of the microstructure, defects, and hardness was investigated using grazing-incidence X-ray diffraction (GIXRD), transmission electron microscopy (TEM) and nanoindentation tests. The GIXRD results showed that diffraction peaks shifted towards lower 2θ values, indicating that lattice swelling was caused by irradiation-induced defects after irradiation at elevated temperatures. According to the TEM observations, the size of the dislocation loops remained nearly constant, while their number density decreased with an increase in irradiation temperature. The precipitation of Cr was not observed in the W-0.3Cr alloy after irradiation at 773 K. In contrast, it was significant in the samples irradiated at temperatures of 1073 and 1273 K, showing increases in both the size and number density of the precipitates. Irradiation hardening was observed in all samples, primarily attributed to the presence of dislocation loops. The hardness change was estimated with the dispersion barrier hardening model by taking into account the contributions of dislocation loops and Cr precipitates. The values evaluated with the model were significantly larger than those obtained with the nanoindentation tests. This difference was ascribed to the depletion of solute Cr atoms from the W matrix by precipitation.
期刊介绍:
Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry.
The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.