Effect of Zr and Mg on microstructure and fracture toughness of Nb-Si based alloys
Effect of Zr and Mg on microstructure and fracture toughness of Nb-Si based alloys
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Zr和Mg对Nb-Si基合金显微组织和断裂韧性的影响
DOI：
10.1007/s12598-011-0296-3
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发表时间：
2011-11
期刊：
影响因子：
--
通讯作者：
韩雅芳
中科院分区：
文献类型：
--
作者：
王玉叶;武美伶;李树索;韩雅芳
采用电弧熔炼技术制备了成分为Nb-16Si-22Ti-3Cr-3Al-2Hf(at.%)和Nb-16Si-22Ti-3Cr -3Al-2Hf(at.%)+1.5at%Zr+0.01 at.%Mg的合金锭。铸锭在氩气氛中于 1450 °C 下热处理 100 小时并炉冷。通过X射线衍射(XRD)对两种合金中的物相进行了研究，结果表明两种合金的主相均为Nbss和Nb5Si3。通过电子探针显微分析仪（EPMA）测定了两种合金的微观结构。结果表明，添加Zr和Mg的合金中大的Nb5Si3块的数量明显少于不含Zr和Mg的合金，并且两种合金中都存在被Nbss基体包围的小Nb5Si3颗粒。断裂韧性测试结果表明，添加1.5 at.%Zr和0.01 at.%Mg的合金的室温断裂韧性比不含Zr和Mg的合金提高了约30%。在本次调查中还研究了裂纹的扩展行为。
The alloy ingots with the compositions of Nb-16Si-22Ti-3Cr-3Al-2Hf (at.%) and Nb-16Si-22Ti-3Cr -3Al-2Hf (at.%)+1.5at%Zr+0.01 at.%Mg were prepared by the electric arc melting technique. The ingots were heat treated in argon atmosphere at 1450 °C for 100 h and with furnace cooling. The phases in the two alloys were investigated by X-ray diffraction (XRD), and the result showed that the main phases in both alloys were Nbss and Nb5Si3. The microstructure of the two alloys was determined by electro probe micro analyzer (EPMA). The results showed that the amount of large Nb5Si3 blocks in the alloy with the addition of Zr and Mg was obviously less than that in the alloy without Zr and Mg, and the small Nb5Si3 particles surrounded by Nbss matrix existed in both alloys. The results of the fracture toughness tests indicated that the room temperature fracture toughness of the alloy with the addition of 1.5 at.%Zr and 0.01 at.%Mg was about 30% higher than that of the alloy without Zr and Mg. The propagation behavior of the cracks was also studied in the present investigation.
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DOI：
10.1016/j.msea.2006.12.023
发表时间：
2007-05
影响因子：
6.4
作者：
K. Chattopadhyay;R. Sinha;R. Mitra;K. Ray
通讯作者：
K. Chattopadhyay;R. Sinha;R. Mitra;K. Ray
影响因子：
4.4
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
J. Guo;Tian Yuzhen;G. Cheng;Limei Zhou;L. He;H. Ye
影响因子：
4.4
作者：
Geng, Jie;Tsakiropoulos, Panos
通讯作者：
Tsakiropoulos, Panos
热挤压多相Nb-10Si-2Fe原位复合材料的断裂韧性
影响因子：
6
作者：
K.F. Zhang;J.L. Yu
通讯作者：
J.L. Yu