A promising new class of irradiation tolerant materials:Ti2ZrHfV0.5Mo0.2 high-entropy alloy
来源期刊:JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第3期
论文作者:Yiping Lu Hefei Huang Xuzhou Gao Cuilan Ren Jie Gao Huanzhi Zhang Shijian Zheng Qianqian Jin Yonghao Zhao Chenyang Lu Tongmin Wang Tingju Li
文章页码:369 - 373
摘 要:Recently, high-entropy alloys(HEAs) or multi-principal-element alloys with unprecedented physical,chemical, and mechanical properties, have been considered as candidate materials used in advanced reactors due to their promising irradiation resistant behavior. Here, we report a new single-phase bodycentered cubic(BCC) structured Ti2 ZrHfV0.5Mo0.2 HEA possessing excellent irradiation resistance, i.e.,scarcely irradiation hardening and abnormal lattice constant reduction after helium-ion irradiation,which is completely different from conventional alloys. This is the first time to report the abnormal XRD phenomenon of metallic alloys and almost no hardening after irradiation. These excellent properties make it to be a potential candidate material used as core components in next-generation nuclear reactors. The particular irradiation tolerance derives from high density lattice vacancies/defects.
Yiping Lu1,Hefei Huang2,Xuzhou Gao3,Cuilan Ren2,Jie Gao2,Huanzhi Zhang1,Shijian Zheng4,Qianqian Jin4,Yonghao Zhao3,Chenyang Lu5,Tongmin Wang1,Tingju Li1
1. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS)3. School of Materials Science and Engineering, Nanjing University of Science and Technology4. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences5. Department of Nuclear Engineering and Radiological Sciences, University of Michigan
摘 要:Recently, high-entropy alloys(HEAs) or multi-principal-element alloys with unprecedented physical,chemical, and mechanical properties, have been considered as candidate materials used in advanced reactors due to their promising irradiation resistant behavior. Here, we report a new single-phase bodycentered cubic(BCC) structured Ti2 ZrHfV0.5Mo0.2 HEA possessing excellent irradiation resistance, i.e.,scarcely irradiation hardening and abnormal lattice constant reduction after helium-ion irradiation,which is completely different from conventional alloys. This is the first time to report the abnormal XRD phenomenon of metallic alloys and almost no hardening after irradiation. These excellent properties make it to be a potential candidate material used as core components in next-generation nuclear reactors. The particular irradiation tolerance derives from high density lattice vacancies/defects.
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