| 镍基粉末高温合金中夹杂物的微观力学行为研究 |
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| 引用本文： | 谢锡善,张丽娜,张麦仓,董建新. 镍基粉末高温合金中夹杂物的微观力学行为研究[J]. 金属学报, 2002, 38(6): 635-642 |
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| 作者姓名： | 谢锡善 张丽娜 张麦仓 董建新 |
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| 作者单位： | 1. 北京科技大学高温合金研究室,北京,100083
2. 北京科技大学高温合金研究室,北京,100083；清华大学材料科学与工程研究院,北京,100084 |
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| 基金项目： | 国家自然科学基金59871007资助项目 |
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| 摘 要： | 采用扫描电镜原位拉伸和原位疲劳实验,直接跟踪观察人工植入夹杂(Al2O3)的粉末高温合金(P/MRene95)中夹杂物的微观力学行为(特别是裂纹的萌生、扩展以致断裂的过程）。同时，采用ANSYS有限元分析软件，建立含夹杂物的P／MRene95合金的有限元分析模型，计算在受力状态下夹杂物及其周围基体的应力应变场分布，进而从宏观动力学角度分析夹杂物的微观力学行为。
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| 关 键 词： | 粉末高温合金 夹杂物 裂纹萌生 扩展 断裂 |
| 文章编号： | 0412-1961(2002)06-0635-08 |
| 修稿时间： | 2002-04-02 |
MICRO-MECHANICAL BEHAVIOR STUDY OF NON-METALLIC INCLUSIONS IN NICKEL-BASE P/M SUPERALLOY |
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| XIE Xishan ZHANG Lina,ZHANG Maicang,DONG Jianxin) High Temperature Materials Research Laboratories,University of Science and Technology Beijing,Beijing ) School of Materials Science and Engineering,Tsinghua University,Beijing Correspo. MICRO-MECHANICAL BEHAVIOR STUDY OF NON-METALLIC INCLUSIONS IN NICKEL-BASE P/M SUPERALLOY[J]. Acta Metallurgica Sinica, 2002, 38(6): 635-642 |
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| Authors: | XIE Xishan ZHANG Lina ZHANG Maicang DONG Jianxin) High Temperature Materials Research Laboratories University of Science Technology Beijing Beijing ) School of Materials Science Engineering Tsinghua University Beijing Correspo |
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| Affiliation: | XIE Xishan ZHANG Lina,ZHANG Maicang,DONG Jianxin1) High Temperature Materials Research Laboratories,University of Science and Technology Beijing,Beijing 100083 2) School of Materials Science and Engineering,Tsinghua University,Beijing 100084Correspo |
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| Abstract: | Special designed SEM in situ tensile and fatigue tests have been conducted to trace the whole process of crack initiation and propagation till to fracture of Al2O3 seeded P/M Rene 95 Ni-base superalloy. Stress and strain field distribution around inclusions has been calculated by means of elasto-plastic finite element method(FEM)with a commercial software of ANSYS. Further analyses have been conducted in combination with the results of in situ tensile and fatigue tests and FEM simulation. |
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| Keywords: | P/M Ni-base superalloy inclusion crack initiation and propagation fracture |
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