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采用重力铸渗法制备了ZTA/高锰钢(Mn17Cr2)基复合材料，利用分离式霍普金森压杆(SHPB)对其在高应变速率(975、1060、1581、2664和3193 s-1)下进行动态压缩实验，分析了复合材料在不同应变速率下的动态力学行为。结果表明：当应变速率从975 s-1增加到3139 s-1时，复合材料的加工硬化现象越明显，屈服强度与抗压强度都增加了约2倍，加工硬化率增加了2.7倍以上，显微硬度也从318.3 HV0.1增加到了505.4 HV0.1;随着应变速率的增大，基体和ZTA颗粒的局部结合处在很短时间内积聚了大量热量导致温度升高，这会使基体出现因热软化而导致的熔化现象。
Abstract：ZTA/high manganese steel(Mn17Cr2) based composites were prepared by gravity casting method, and dynamic compression experiments were carried out for the composites using a split Hopkinson pressure bar(SHPB) at high strain rates(975 s-1, 1060 s-1, 1581 s-1, 2664 s-1, and 3193 s-1). The dynamic mechanical behavior of the composites at different strain rates was analyzed. The results show that as the strain rate increases from 975 s-1 to 3139 s-1, the work hardening phenomenon of the composites becomes more pronounced, the yield strength and compressive strength increase by about 2 times, the work hardening rate increases by more than 2.7 times, and the microhardness increases from 318.3 HV0.1 to 505.4 HV0.1. As the strain rate increases, the local bonding between the matrix and ZTA particles accumulates a large amount of heat in a short period of time, leading to a temperature increase and the subsequent matrix melting due to thermal softening.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2024-0270
中图分类号:TB333
引用信息:
[1]杨剑,周谟金,王志杰等.高应变速率下ZTA/Mn17Cr2复合材料的动态压缩性能[J].材料热处理学报,2025,46(04):32-40.DOI:10.13289/j.issn.1009-6264.2024-0270.
基金信息:
云南省基础研究计划(202401AT070320)