加载速率、缺口大小对钨合金拉伸性能的影响

Effects of Loading Rate and Gap Size on Tensile Property of Tungsten Alloy

在电脑伺服控制试验机上对钨合金进行了动态拉伸试验,研究了加载速率、缺口大小对钨合金的拉伸性能的影响。从微观上分析了断裂机制及抗拉强度与断口形貌的关系。结果表明,在0.8335~2.08375 mm/min加载速率范围内,随加载速率和缺口的增大,钨合金的抗拉强度和屈服强度都在逐渐增大,由此得出加载速率和缺口大小对钨合金的强度具有强化效应。

The dynamic tensile tests were performed for tungsten alloy. The influences of loading rate and gap size on the tensile properties of tungsten alloy were investigated. The relationship between fracture micro-mechanism ,tensile strength and fracture morphologies were analyzed. The results show that under the loading rate of 0.8335mm/min-2.08375mm/min, the tensile strength and yield strength of the alloy increase constantly with increasing loading rate and gap size, so there is a strengthening effect on the strength of tungsten alloy.