| 切削速度对单晶锗脆塑转变的影响 |
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| 引用本文： | 杨晓京,刘浩,赵彪,刘宁.切削速度对单晶锗脆塑转变的影响[J].宇航材料工艺,2018,48(4):80-84. |
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| 作者姓名： | 杨晓京 刘浩 赵彪 刘宁 |
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| 作者单位： | 昆明理工大学机电工程学院 |
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| 基金项目： | 国家自然科学基金（51765027） |
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| 摘 要： | 采用纳米压痕仪对单晶锗(100)(110)(111)晶面进行了纳米划痕实验,分析不同划痕速度对单晶锗不同晶面脆塑转变临界状态变化规律的影响,采用原子力显微镜对样品表面进行扫描观测。结果表明:划痕速度增加,单晶锗产生塑性去除的区域增大;但划痕速度过大,就会降低单晶锗产生塑性去除的区域。预测了在超精密切削加工中切削速度对单晶锗发生脆塑转变时的临界状态的影响规律,为实际超精密切削加工单晶锗零件提供数据支持。
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| 关 键 词： | 单晶锗 纳米划痕实验 脆塑转变 划痕速度 临界状态 |
| 收稿时间： | 2018/1/8 0:00:00 |
Effect of Cutting Speed on Brittle Plastic Transition of Single Crystal Germanium |
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| YANG Xiaojing,LIU Hao,ZHAO Biao and LIU Ning.Effect of Cutting Speed on Brittle Plastic Transition of Single Crystal Germanium[J].Aerospace Materials & Technology,2018,48(4):80-84. |
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| Authors: | YANG Xiaojing LIU Hao ZHAO Biao and LIU Ning |
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| Institution: | Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500,Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500,Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500 and Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500 |
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| Abstract: | The influence of different scratching speed of scratches on the critical state of brittle-plastic transition of single crystal germanium was studied based on the nano-scratch experiments, which were carried out on single crystal germanium (100) (110) (111) crystal surface by using a nano indentation instrument. Atomic force microscope was applied to observe the material surface. The results show that the plastic removal region of single crystal germanium will increase with the scratching speed raises. Nevertheless, the plastic removal region of single crystal germanium may decrease if the speed of scratches is too large. Furthermore, the influencing rules of cutting speed on the critical state of brittle to plastic transition of single crystal germanium in the ultra-precision machining process is predicted, which provides the data support for the ultra-precision machining of single-crystal germanium parts. |
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| Keywords: | Single crystal germanium Nano-scratch experiments Brittle-plastic transition Scratching speed Critical state |
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