Dynamic mechanical behavior and microstructure response characteristics of impact-resistant steel with high strength, high toughness and low density
In recent years, people have paid much attention to low density steel, whose density is more than 10% lower than that of traditional steel, and has the characteristics of high strength, high toughness and significant strain hardening.The low density steel has great potential application value in many fields.The dynamic mechanical behavior and microstructure response characteristics of high strength, high toughness and low density steel under high speed impact were studied.The results show that based on the theory of atomic dilution, the density of the low density steel prepared by reasonably adjusting austenite stability is less than 7.0g/cm3.The dynamic yield strength of the steel is more sensitive to the stress rate.When the strain rate is 4000s-1, the dynamic yield strength of the experimental steel reaches above 1800MPa, and dynamic strengthening effect is remarkable.The reclaimed samples from high speed impact experiment were observed with SEM and TEM.It is found that the original austenite structure exhibits obvious transformation induced plasticity (TRIP),twinning induced plasticity (TWIP) and microband induced plasticity (MBIP).This mechanism can improve its ability to resist high speed impact.
Low-density steel Austenite Dynamic mechanical behavior Shock-induced phase transformation
Shi-lian HU Hong-kai ZHOU Yu-jiang TIAN Qun-bo FAN Yang-wei WANG Hang-biao WEI Yi-min CEN Jun HU Bo CAI
China North Material Science and Engineering Technology Group Corporation, Ningbo 315000, China Beijing Institute of Technology, Beijing, 100080,China
国际会议
2018 International Conference on Defence Technology (2018国际防务技术会议)
北京
英文
427-430
2018-10-21（万方平台首次上网日期，不代表论文的发表时间）