| Nb-10Si合金室温断裂韧性研究 |
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| 引用本文： | 李伟,杨海波,单爱党,吴建生.Nb-10Si合金室温断裂韧性研究[J].航空学报,2005,26(1):103-106. |
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| 作者姓名： | 李伟 杨海波 单爱党 吴建生 |
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| 作者单位： | 上海交通大学,材料科学与工程学院,上海,200030 |
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| 基金项目： | 国家自然科学基金(50131030)资助项目 |
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| 摘 要： | 利用真空电弧熔炼制备了处于亚共晶区的Nb-10Si-xMo(x=5,15)复合材料,采用扫描电子显微镜(SEM)和X射线衍射(XRD)分析了在1200℃退火100h后复合材料的微观组织形貌、相组成和断口形貌,并测定了Nb-10Si-Mo复合材料的显微硬度。用单边切口悬臂梁法(SENB)研究了加入合金元素后复合材料室温韧性的变化。深入分析了合金元素对材料韧性相变形行为和复合材料室温断裂韧性的影响。
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| 关 键 词： | Nb/Nb5Si3复合材料 断裂韧性 单边切口悬臂梁(SENB) 维氏硬度 亚稳相 |
| 文章编号： | 1000-6893(2005)01-0103-04 |
| 修稿时间： | 2003年11月27 |
Study on the Fracture Toughness of Nb-10Si Alloys |
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| LI Wei,YANG Hai-bo,SHAN Ai-dang,WU Jian-sheng.Study on the Fracture Toughness of Nb-10Si Alloys[J].Acta Aeronautica et Astronautica Sinica,2005,26(1):103-106. |
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| Authors: | LI Wei YANG Hai-bo SHAN Ai-dang WU Jian-sheng |
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| Institution: | School of Material Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | Nb-10Si and Nb-10Si-xMo(x=5,15) composites at hypoeutectic compositions are prepared by arc-melting, followed by heat treatment at 1200℃ for 100 hours. The microstructures, compositions and the fracture surface of annealed sample are investigated using scanning electron microscopy (SEM) and X-ray energy disperse spectrum (EDS), as well as X-ray diffraction (XRD). The microhardness of Nb-10Si-Mo is determined. Single edge notched bending (SENB) test is used to measure the fracture toughness of Nb-10Si-xMo(x=0,5,15). The effect of Mo addition on the deformability of ductile phase in Nb/Nb5Si3 and the fracture toughness of Nb/Nb5Si3 in situ composites is further studied. |
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| Keywords: | Nb/Nb_5Si_3 composites fracture toughness single edge notched bending (SENB) Vickers hardness metastable phase |
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