Effects of Different Plating Solutions Permeating into Fatigue Crack Tip on Crack Growth Rate of 45 Steel
摘 要
研究了在45钢疲劳裂纹尖端渗注不同镀液对该疲劳裂纹扩展速率的影响,并采用扫描电镜和能谱仪对渗注镀液后裂纹尖端的形貌和成分进行了分析.结果表明:当应力强度因子幅值ΔK一定时,两种镀液渗注后的45钢疲劳裂纹扩展速率均比未渗注的大幅降低;随着时间的延长,渗注镀液后45钢疲劳裂纹扩展速率先降低然后趋于稳定;镀液可有效渗注到疲劳裂纹尖端,且磷化液的止裂效果优于镀镍液的.
Abstract
Effects of different plating solutions permeating into fatigue crack tip on the crack growth rate of the 45 steel were investigated.The morphology and component of the fatigue crack tip after the solution permeating were analyzed by means of SEM and EDS.The results indicate that the crack growth rate of the 45 steel deposited with the two plating solutions was obviously lower than that of the one without deposition when the stress intensity factor amplitude ΔK was invariable.With the prolongation of time,the crack growth rate of the 45 steel after deposition first decreased then tended to be steady.The solution could effectively permeated into the fatigue crack tips.The crack arrest effect of the phosphate plating solution was better than that of the nickel plating solution.
中图分类号 TG115.5
所属栏目 试验研究
基金项目 江苏省高校自然科学基础研究项目(07KJB430036);南京工程学院基金项目(KXJ08003;KXJ08053;KXG08138)
收稿日期 2010/1/15
修改稿日期 2010/9/16
网络出版日期
作者单位点击查看
备注白允强(1979-),男,山东聊城人,讲师,博士.
引用该论文: BAI Yun-qiang,WANG Zhang-zhong,HE Xian-cong,ZHOU Heng-zhi,BA Zhi-xin. Effects of Different Plating Solutions Permeating into Fatigue Crack Tip on Crack Growth Rate of 45 Steel[J]. Materials for mechancial engineering, 2010, 34(12): 22~24
白允强,王章忠,贺显聪,周衡志,巴志新. 45钢疲劳裂纹尖端渗注不同镀液对裂纹扩展速率的影响[J]. 机械工程材料, 2010, 34(12): 22~24
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