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研究深冷和时效处理对Ti-6Al-4V合金冲击强度和力学性能的影响。对Ti-6Al-4V合金分别进行深冷处理(CT)、时效处理(AT)以及先深冷后时效处理(CAT)。用不同几何形状(半圆形、60°和90°锥角)的冲击头对经热处理和未经热处理Ti-6Al-4V样品进行冲击实验以考察冲击头几何形状对样品损伤特性的影响。结果表明,所有热处理样品吸收能量增加而损伤面积降低。由于吸收能量的增加,CAT样品具有最高的吸收能量和最小的损伤面积,而未经处理的样品出现最大变形。此外,冲击头的几何形状对样品的损伤面积和偏移量产生极大影响。使用60°锥角冲击头进行冲击实验的样品具有最大的偏移量(角)和最小变形面积。样品的变形面积随冲击头锥角的增大而增大。
The effects of cryogenic and aging treatments on the impact strength and mechanical properties of Ti-6Al-4V alloy were studied. Cryogenic treatment (CT), aging treatment (AT) and post-cryogenic aging treatment (CAT) were performed on Ti-6Al-4V alloy respectively. Ti-6Al-4V samples were heat-treated and non-heat-treated with impact heads of different geometries (semicircular, 60 ° and 90 ° cone angle) to investigate the effect of impact head geometry on the damage characteristics of the sample. The results show that all heat-treated samples absorb more energy and damage area decreases. Due to the increase of absorbed energy, CAT sample has the highest absorption energy and the smallest damage area, while the untreated sample shows the maximum deformation. In addition, the geometry of the impact head has a significant impact on the damage area and offset of the specimen. Samples subjected to impact experiments using a 60 ° cone impact head had the largest offset (angle) and the smallest deformation area. The deformation area of the sample increases with the increase of impact head cone angle.