【作者】 庞建超； 李守新； 张哲峰；

【Author】 J.C.Pang,S.X.Li and Z.F.Zhang Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,110016, Shenyang,China

【机构】 中国科学院金属研究所沈阳材料科学国家(联合)实验室；

【摘要】 本文系统研究了拉伸强度水平为500MPa～1300MPa范围的四个不同强度的QBe2铍青铜的高周疲劳行为,试图寻找疲劳性能与其他力学性能的关系,主要讨论了QBe2铍青铜的疲劳性能与显微组织,尤其是与析出物尺寸和晶粒尺度的关系。研究结果表明:疲劳强度与抗拉强度、屈服强度和冲击韧性等力学性能没有很好的相关性;相对于固溶强化和析出强化,细晶强化对疲劳性能提高的贡献更大。在此基础上本文提出了一个新的静态韧度来预测疲劳强度。更多还原

【Abstract】 The high-cycle fatigue behaviors of Cu-Be alloy with tensile strength ranging from 500 to 1300 MPa by different treatments were studied to find the relation between fatigue property and other mechanical properties.The experimental results demonstrate that there is no obvious correlation between fatigue strength and tensile(yield) strength and impact toughness;compared with solution strengthening and precipitation strengthening,it was found that refinement strengthening play a more important role in improving the fatigue strength.The relations between fatigue properties and microstructure,especial the sizes of grain and precipitate were mainly discussed.Based on the results above,a new tensile toughness was proposed to predict the fatigue property.更多还原