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

Effects of Pore Size on Fatigue Deformation Mechanism of Open-Cell Copper Foam at Low Stress Amplitude.
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孔径对低应力幅开孔泡沫铜疲劳变形机制的影响

DOI:
10.3390/ma11091639
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发表时间:
2018-09-06
期刊:
Materials (Basel, Switzerland)
影响因子:
--
通讯作者:
Ren Y
Ren Y
中科院分区:
其他
文献类型:
--
作者:
Chen J;Dai S;Li C;Li W;Ren Y

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对不同孔径开孔泡沫铜进行了轴向压缩-压缩疲劳试验。研究了应变幅对疲劳性能的影响,发现疲劳寿命与应变幅之间存在指数关系。实验结果表明,较小的孔径与较低的疲劳寿命有关。采用光学显微镜和扫描电镜对低应力幅下泡沫铜的微观组织进行了观察,发现不同孔径的泡沫铜具有不同的疲劳行为。通过实验研究,比较了开孔泡沫铜的疲劳破坏机理。
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.
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