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Materials (Basel). 2018 Sep 6;11(9). pii: E1639. doi: 10.3390/ma11091639.

Effects of Pore Size on Fatigue Deformation Mechanism of Open-Cell Copper Foam at Low Stress Amplitude.

Chen J1,2, Dai S3,4, Li C5,6,7, Li W8,9, Ren Y10,11.

Author information

1
School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410014, China. chenjian513@csust.edu.cn.
2
Key Laboratory of Energy Efficiency and Clean Utilization, Education Department of Hunan Province, Changsha University of Science & Technology, Changsha 410014, China. chenjian513@csust.edu.cn.
3
School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410014, China. shuoweidai@126.com.
4
Key Laboratory of Energy Efficiency and Clean Utilization, Education Department of Hunan Province, Changsha University of Science & Technology, Changsha 410014, China. shuoweidai@126.com.
5
School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410014, China. liconghntu@csust.edu.cn.
6
Key Laboratory of Energy Efficiency and Clean Utilization, Education Department of Hunan Province, Changsha University of Science & Technology, Changsha 410014, China. liconghntu@csust.edu.cn.
7
Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi University, Nanning 530004, China. liconghntu@csust.edu.cn.
8
School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410014, China. lwzzgjajie@126.com.
9
Key Laboratory of Energy Efficiency and Clean Utilization, Education Department of Hunan Province, Changsha University of Science & Technology, Changsha 410014, China. lwzzgjajie@126.com.
10
School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410014, China. yjren@csust.edu.cn.
11
Key Laboratory of Energy Efficiency and Clean Utilization, Education Department of Hunan Province, Changsha University of Science & Technology, Changsha 410014, China. yjren@csust.edu.cn.

Abstract

Axial compression-compression fatigue experiments on open-cell copper foams with different pore size were investigated in this paper. The effects of the strain amplitude on the fatigue properties were studied and found that there is an exponential relationship between the fatigue life and strain amplitude. The experimental results indicate that a smaller pore size is related to a lower fatigue life. The microstructures of failed copper foam tested at low stress amplitude were observed by optical microscope and scanning electron microscopy (SEM), suggests that different pore size related to different fatigue behavior. The fatigue failure mechanism of the open-cell copper foams were compared by experimental research.

KEYWORDS:

failure mechanism; open-cell copper foam; pore size

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