摘要
采用粉末冶金法制备钨合金棒材,通过锻造变形的方法进一步提高钨合金棒材的力学性能,并采用混合率模型计算不同状态钨合金的强度。与实验结果比较发现,应力传递模型可以很好地反应随着变形量增加钨合金强度增加的变化趋势。通过对变形强化钨合金轴向和径向力学性能、断口特征、金相组织的比较以及钨合金在承载过程中的定量力学分析指出,随着钨合金变形量的增加,大面积的基体相韧窝断裂被基体撕裂棱状断裂和钨颗粒的穿晶解理断裂所取代,这也是导致合金强度提高的原因。
The tungsten alloy bar was prepared using the powder metallurgy method, and the mechanical properties of tungsten alloy were strengthened by forging. The mixing rule model was applied to calculate the strength of tungsten alloy. Compared with experimental results, it is found that the strength of tungsten alloy increases with the amount of deformation, which can be fully revealed by the stress transfer model. The fracture mechanism changes obviously with the increase of tungsten alloy deformation, which can be proved by the results of mechanical properties and metallographic structure.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2017年第5期19-22,共4页
Ordnance Material Science and Engineering
关键词
钨合金
变形强化
机理
强度估算
tungsten alloy
deformation strengthening
mechanism
strength calculation
