| 数字散斑相关法研究镍钴基高温合金中的PLC效应 |
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| 引用本文： | 符师桦,高越,潘华烨,程腾,崔传勇,张青川. 数字散斑相关法研究镍钴基高温合金中的PLC效应[J]. 实验力学, 2012, 27(5): 581-586 |
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| 作者姓名： | 符师桦 高越 潘华烨 程腾 崔传勇 张青川 |
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| 作者单位： | 1. 中国科学技术大学,中国科学院材料力学行为和设计重点实验室,合肥230027
2. 中国科学院金属研究所,沈阳,110016 |
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| 基金项目： | 国家自然科学基金(11102201和51171179)、中国科学院“百人计划”项目资助、中国博士后科学基金(20100480684)以及中央高校基本科研业务费专项资金(WK2090050017)资助的课题。 |
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| 摘 要： | 作为航空发动机涡轮盘用新型材料,镍钴基变形高温合金在300～600℃温度区间内拉伸时会产生Portevin-Le Chatelier (PLC)效应.本文采用数字散斑相关方法,研究了镍钴基变形高温合金在400℃下拉伸变形过程中伴随PLC效应出现的应变局域化现象,即PLC带.实验结果表明,PLC带内的应变比试件平均应变大一个数量级,而带外部分应变接近于零.同时还观察到了带外部分的弹性收缩现象,即出现应变为负的区域.在拉伸全程中,PLC带与拉伸轴方向成约60°的夹角.PLC带的宽度均为4～4.5 mm,远大于试件最小尺寸(厚度),这一点与铝合金中的带宽与试件最小尺寸相近这一现象截然不同.
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| 关 键 词： | Portevin-Le Chatelier效应 动态应变时效 高温合金 数字散斑相关 PLC带 |
Investigation on Portevin-Le Chatelier Effect in a Ni-Co Based Superalloy Base on Digital Speckle Correlation |
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| FU Shi-hu,GAO Yue,PAN Hua-ye,CHENG Teng,CUI Chuan-yong and ZHANG Qing-chuan. Investigation on Portevin-Le Chatelier Effect in a Ni-Co Based Superalloy Base on Digital Speckle Correlation[J]. Journal of Experimental Mechanics, 2012, 27(5): 581-586 |
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| Authors: | FU Shi-hu GAO Yue PAN Hua-ye CHENG Teng CUI Chuan-yong ZHANG Qing-chuan |
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| Affiliation: | CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China;CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China;CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China;CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China;Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China |
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| Abstract: | |
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| Keywords: | Portevin-Le Chatelier (PLC) effect dynamic strain aging superalloy digital speckle correlation PLC band |
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