摘要
采用平面弯曲疲劳试验,测定了C1100P14H纯铜和C2801P14H黄铜的SN曲线。结果表明,实验铜合金没有疲劳极限。随外加交变应力增大,疲劳寿命缩短。在相同外加应力条件下,轧制态合金的疲劳寿命高于退火态合金的疲劳寿命。利用MansonCoffin法则和塑性应变幅与疲劳循环次数的理论关系,通过计算得到了铜合金的理论SN关系曲线,与实验结果吻合较好,表明该理论SN关系曲线可用来预测铜合金的疲劳寿命。
The S-N curves of pure copper C1100P-1/4H and brass C2801P-1/4H were obtained by plain bending fatigue test. The experimental results show that there is no fatigue limits for all the alloys, and the fatigue life of the alloys decreases as the applied stress increases. The fatigue life of the rolled alloys is longer than that of the annealed alloys in the case of the same applied stress. Based on Manson-Coffin's rule and the relationship between plastic strain range and number of stress cycle, the theoretical S-N curves of the alloys are calculated and compared with experiment data. It is showed that the theory S-N curves are agreement with the experiments data, so it can be concluded that the theoretical S-N curves can be used to predict the fatigue life of the Cu alloys.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2005年第5期76-79,共4页
Transactions of Materials and Heat Treatment
关键词
铜合金
疲劳
S-N曲线
寿命预测
Failure (mechanical)
Fatigue of materials
Fatigue testing
Forecasting
Fracture
