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以北京理工大学自主研发的新型近β型钛合金Ti684为研究对象,以Ti-6Al-4V为参比,研究了Ti684合金的微观组织、动态力学性能以及其作为装甲材料的抗弹性能。结果表明:经900℃/15 min/WQ处理后的Ti684组织由尺寸为150μm左右的等轴β相大晶粒组成;经应变率为2600s-1的动态压缩测试后,900℃/15 min/WQ处理的Ti684较Tβ以下固溶时效处理的Ti-6Al-4V具有更高的动态强度1870 MPa和断裂失效应变0.20。具有较好动态力学性能的同时,900℃/15 min/WQ处理的Ti684在靶试抗冲击过程中产生了应力诱发马氏体,延缓了绝热剪切带的形成,表现出了比Ti-6Al-4V试样更好的抗弹性能。
Taking Ti684, a new near-Ti alloy developed by Beijing Institute of Technology as the research object, Ti-6Al-4V as reference, the microstructure, dynamic mechanical properties and anti-ballistic performance of Ti684 alloy were studied. The results show that the microstructure of Ti684 treated by 900 ℃ / 15 min / WQ is composed of large equiaxed grains with a size of about 150μm. After the dynamic compression test at a strain rate of 2600s-1, Ti-6Al-4V treated with WQ had a higher dynamic strength of 1870 MPa and a rupture failure strain of 0.20 than that of T-6 Ti-6Al-4V. At the same time, Ti684 treated by 900 ℃ / 15 min / WQ produced stress-induced martensite during the impact resistance test and retarded the formation of adiabatic shear bands. -4V sample better anti-ballistic performance.