掺杂Y2O3钨基复合材料在近韧脆转变温区的静载拉伸特性
Static Tensile Properties near Ductile-Brittle Transition Temperature Region of W-based Composites Doped with Y2O3
摘 要
制备了掺杂质量分数分别为0.5%，2.0% Y2O3的钨基复合材料，研究了其显微组织，通过不同温度（25~800℃）下的拉伸试验分析了其近韧脆转变温区的变形特性。结果表明：2种复合材料均存在由轧制变形导致的大量位错，Y2O3颗粒对位错运动起到钉扎作用；Y2O3掺杂质量分数为2.0%的复合材料的晶粒更细小，发生韧脆转变的温度更低，在300~400℃拉伸时发生半脆性行为，断口区域位错密度在3.8×1015~3.9×1015 m-2，在600~800℃下发生明显塑性变形，位错密度增加至6.2×1015~6.8×1015 m-2。
钨基复合材料
韧脆转变温度
显微组织
Y2O3
W-based composite
ductile-brittle transition temperature
microstructure
Abstract
W-based composites doped with 0.5wt% and 2.0wt% Y2O3 were prepared. The microstructure of the composites was investigated. The deformation characteristics near ductile-brittle transition temperature region of the composites were analyzed by tensile tests at different temperatures (25-800℃). The results show that the two composites had a large number of dislocations formed by rolling deformation, and Y2O3 particles played a pinning role in dislocation motion. The composite containing 2.0wt% Y2O3 had smaller grain size and a lower ductile-brittle transition temperature. The semi-brittle behavior of the composite containing 2.0wt% Y2O3 occurred during tension at 300-400℃, and the dislocation density in the fracture area was between 3.8×1015-3.9×1015 m-2; during tension at 600-800℃, plastic deformation occurred, and the dislocation density increased to 6.2×1015-6.8×1015 m-2.
中图分类号 TG146.4 DOI 10.11973/jxgccl202311004
所属栏目 试验研究
基金项目 国家自然科学基金国际（地区）合作研究与交流项目（52020105014）
收稿日期 2022/6/23
修改稿日期 2023/8/2
网络出版日期
作者单位点击查看
备注黄俊(1983-),女,安徽安庆人,副教授,博士
引用该论文: HUANG Jun,LI Yangyang,YUAN Guohu,ZUO Tong,LUO Laima,XU Guangqing,LYU Jun,TAN Xiaoyue,HONG Yu,ZHU Xiaoyong,WU Yucheng. Static Tensile Properties near Ductile-Brittle Transition Temperature Region of W-based Composites Doped with Y2O3[J]. Materials for mechancial engineering, 2023, 47(11): 18～24
黄俊,李阳阳,袁国虎,左彤,罗来马,徐光青,吕珺,谭晓月,洪雨,朱晓勇,吴玉程. 掺杂Y2O3钨基复合材料在近韧脆转变温区的静载拉伸特性[J]. 机械工程材料, 2023, 47(11): 18～24
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【3】BACHMANN C,AIELLO G,ALBANESE R,et al.Initial DEMO tokamak design configuration studies[J].Fusion Engineering and Design,2015,98/99:1423-1426.
【4】LIBEYRE P,SCHILD T,BRUTON A,et al.From manufacture to assembly of the ITER central solenoid[J].Fusion Engineering and Design,2019,146:437-440.
【5】HILL D N.A review of ELMs in divertor tokamaks[J].Journal of Nuclear Materials,1997,241/242/243:182-198.
【6】BOLT H,BARABASH V,KRAUSS W,et al.Materials for the plasma-facing components of fusion reactors[J].Journal of Nuclear Materials,2004,329/330/331/332/333:66-73.
【7】COENEN J W,ANTUSCH S,AUMANN M,et al.Materials for DEMO and reactor applications:Boundary conditions and new concepts[J].Physica Scripta,2016,T167:014002.
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【10】WANG C J,DONG X N,WEI S Z,et al,Effect of hot-working process on interface structure and ductile-to-brittle transition temperature of tungsten alloy reinforced by Al2O3 particles[J].International Journal of Refractory Metals and Hard Materials,2022,108:105945.
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【24】SCAPIN M,PERONI L,TORREGROSA C,et al.Effect of strain-rate and temperature on mechanical response of pure tungsten[J].Journal of Dynamic Behavior of Materials,2019,5(3):296-308.
【25】YAO G,TAN X Y,FU M Q,et al.Isotropic thermal conductivity in rolled large-sized W-Y2O3 bulk material prepared by powder metallurgy route and rolling deformation technology[J].Fusion Engineering and Design,2018,137:325-330.
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【29】SHEN T L,DAI Y,LEE Y.Microstructure and tensile properties of tungsten at elevated temperatures[J].Journal of Nuclear Materials,2016,468:348-354.
【30】NAGY D,HUMPHRY-BAKER S A.An oxidation mechanism map for tungsten[J].Scripta Materialia,2022,209:114373.
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