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高温处理后泡沫铝的承载性能研究
Bearing Capacity of Aluminum Foam After High Temperature Treatment
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- DOI:
- 作者:
- 张鹏飞，安钰坤，杨思一，邢攸冬，卢世庆，邓百兴，付 慧
ZHANGPengfei, AN Yukun, YANG Siyi, XING Youdong, LU Shiqing, DENG Baixing, FU Hui
- 作者单位:
- 山东理工大学机械工程学院，山东淄博255000
School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China
- 关键词:
- 混合发泡剂；熔体发泡法；塑性变形；平台应力
mixed foaming agent; melt foaming method; plastic deformation; plateau stress
- 摘要:
- 以复合发泡剂替代单一TiH2发泡剂来制备泡沫铝材料，研究300℃和500℃环境下保温2h和4h后泡 沫铝材料的压缩行为和能量吸收性能。结果表明，随着温度的升高，孔壁内表面Al元素的含量逐渐降低，O元素的含量 逐渐升高，尤其是当温度上升到500℃时，O元素含量增加的趋势更加明显；对于第一组样品而言，随温度升高，试样压 缩屈服应力减小；而对于第二组样品随温度升高，试样压缩屈服应力先升高后降低。能量吸收效率随温度的变化也是如 此。 泡沫铝主要的失效机制为孔壁塑性变形和局部胞壁压溃形成断裂带。Aluminum foam materials was prepared by using composite foaming agent instead of single TiH2 foaming agent. The compression behavior and energy absorption performance of aluminum foam materials were studied after holding at 300 ℃ and 500 ℃ for 2 h and 4 h. The results show that the content of Al element on the inner surface of the hole wall gradually decreases with the increase of temperature, while the content of Oxygen element gradually increases, especially when the temperature rises to 500 ℃, the content of Oxygen element increases more obviously. For the first group of samples, the compressive yield stress decreases with the increase of temperature. For the second group of samples, the compressive yield stress first increases and then decrease with the increase of temperature. The change of the energy absorption efficiency with temperature. The main failure mechanisms of foamed aluminum are pore wall plastic deformation and local cell wall collapse forming fault zone.