Dynamic mechanical behavior and energy releasing characteristics of Al-Ni-W reactive materials

摘要：

　　In this paper, dynamic mechanical behavior of Al-Ni-W reactive material was investigated by split Hopkinson pressure bar.The results show that Al-Ni-W reactive material has no effect of strain hardening and strain rate hardening under dynamic compression.Fracture cracks initially occur at the interface of Al/Ni and Al/W.The energy release characteristics of Al-Ni-W reactive material were analyzed by measuring the quasi-static pressure generated by the impact reaction at different speeds of Al-Ni-W reactive material.The experimental results show that speed threshold of the reaction caused by the reactive fragment impacting on the steel anvil is not more than 713m/s.And chemical energy and quasi-static pressure generated by reaction of the reactive material have a linear relationship with the impact velocity.When reactive fragment impacts steel anvil at the speed of 1176m/s, the energy released by reaction reaches 2.23kJ/g, which is higher than energy released from the intermetallic reaction, indicating that oxidation reactions of metals take place with oxygen.

关键词： Al-Ni-W,Reactive material Dynamic mechanical behavior Energy releasing characteristics

作者: Zhao-xun CAO Jun WANG Xiu-rong ZHU

作者单位: Ningbo Branch of China Ordnance Academy, Ningbo 315103, Zhejiang, China

会议类型: 国际会议

会议名称: 2018 International Conference on Defence Technology (2018国际防务技术会议)

会议地点: 北京

会议语种:英文

页码: 403-407

在线出版日期: 2018-10-21（万方平台首次上网日期，不代表论文的发表时间）