| P/M Rene95合金夹杂物微观力学行为观察 |
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| 引用本文： | 张丽娜,张麦仓,李晓,董建新,谢锡善.P/M Rene95合金夹杂物微观力学行为观察[J].北京科技大学学报,2002,24(4):432-435. |
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| 作者姓名： | 张丽娜 张麦仓 李晓 董建新 谢锡善 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金;59871007; |
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| 摘 要： | 以典型粉末高温合金P/M Rene95为研究对象,在扫描电镜原位下观察了其中尺寸不同的陶瓷夹杂物在拉伸载荷下导致裂纹萌生的过程.结果表明,在SEM原位拉伸试验中,随着载荷的增加,裂纹在陶瓷夹杂物处萌生.Al2O3夹杂物的尺寸不同,导致裂纹萌生的方式不同.小尺寸的夹杂物引起的裂纹萌生易于产生在夹杂物内部,即夹杂物本身开裂,产生裂纹是在基体大面积屈服之后;而大夹杂物处的裂纹则是在合金基体未屈服之前萌生,位于夹杂/基体的界面.
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| 关 键 词： | P/M Rene95合金 夹杂物 SEM原位拉伸观察 夹杂物行为 |
| 修稿时间： | 2000年2月12日 |
SEM In-situ Observation on Behavior of Inclusions with Different Size in P/M Rene95 Superalloy |
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| ZHANG Una,ZHANG Maicang,LI Xiao,DONG Jianxin,XIE Xishan Material Science and Engineering School,UST Beijing,Beijing ,China.SEM In-situ Observation on Behavior of Inclusions with Different Size in P/M Rene95 Superalloy[J].Journal of University of Science and Technology Beijing,2002,24(4):432-435. |
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| Authors: | ZHANG Una ZHANG Maicang LI Xiao DONG Jianxin XIE Xishan Material Science and Engineering School UST Beijing Beijing China |
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| Institution: | ZHANG Una,ZHANG Maicang,LI Xiao,DONG Jianxin,XIE Xishan Material Science and Engineering School,UST Beijing,Beijing 100083,China |
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| Abstract: | Special arranged experiments were designed for SEM in-situ observation on inclusion behavior in seeded P/M Rene95 superalloy at tension loading stage. Two different size Al2O3 inclusion's behavior were followed by continuous loading till to fracture. Observed results show that crack can be easily initiated at the interface of larger inclusion and matrix even at the stress level lower than yield. Crack can be also initiated in the inclusion and then propagated to the matrix. Both mechanics show the harmful effect of inclusions in P/M superalloys. |
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| Keywords: | P/M Rene95 inclusion SEM in-situ tension observation behavior of inclusions |
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