钛合金自冲铆接头微动磨损机理及疲劳性能
发布时间：2019-06-02 00:28
【摘要】：对钛合金同种TA1-TA1(TT)及异种TA1-Al5052(TA),TA1-H62(TH)自冲铆接头进行疲劳试验,用扫描电子显微镜对断口及微动区进行观测研究其微动磨损机理,并研究下板强度对接头疲劳寿命和失效形式的影响.结果表明,断口裂纹萌生区即为微动磨损区.微动磨损导致微动区亚表面产生微裂纹并逐步扩展为宏观疲劳裂纹导致接头最终失效;微动磨屑在微动磨损过程中主要起减轻磨损作用.总体上TT接头具有最优疲劳性能,疲劳载荷较高时TA接头疲劳性能优异,疲劳载荷较低时TH接头疲劳性能优异.两板强度相当且疲劳载荷较高时失效形式主要为铆钉断裂,疲劳载荷较低时失效形式主要为下板断裂;而下板强度与上板强度相差较大时,疲劳失效形式为下板断裂.
[Abstract]:The fatigue test of titanium alloy TA1-TA1 (TT) and dissimilar TA1-Al5052 (TA), TA1-H62 (TH) self-punching riveting joints was carried out. The fretting wear mechanism of fracture surface and fretting zone was observed and studied by scanning electron microscope (SEM). The effect of lower plate strength on fatigue life and failure form of joint is also studied. The results show that the fracture crack initiation zone is fretting wear zone. Fretting wear leads to microcracks on the subsurface of fretting zone and gradually propagates into macroscopic fatigue cracks, which leads to the final failure of joints, and fretting debris mainly plays an important role in reducing wear in the process of fretting wear. Generally speaking, the TT joint has the optimal fatigue performance. The TA joint has excellent fatigue performance when the fatigue load is high, and the TH joint has excellent fatigue performance when the fatigue load is low. When the strength of the two plates is the same and the fatigue load is high, the failure form is mainly rivet fracture, and when the fatigue load is low, the failure form is mainly the lower plate fracture, while when the lower plate strength is quite different from the upper plate strength, the fatigue failure form is the lower plate fracture.
【作者单位】： 昆明理工大学创新制造技术研究所;
【基金】：国家自然科学基金项目(51565022;51565023) 国家留学基金委(201500090194) 2015年云南省博士研究生学术新人基金
【分类号】：TG146.23;TH131.1
[Abstract]:The fatigue test of titanium alloy TA1-TA1 (TT) and dissimilar TA1-Al5052 (TA), TA1-H62 (TH) self-punching riveting joints was carried out. The fretting wear mechanism of fracture surface and fretting zone was observed and studied by scanning electron microscope (SEM). The effect of lower plate strength on fatigue life and failure form of joint is also studied. The results show that the fracture crack initiation zone is fretting wear zone. Fretting wear leads to microcracks on the subsurface of fretting zone and gradually propagates into macroscopic fatigue cracks, which leads to the final failure of joints, and fretting debris mainly plays an important role in reducing wear in the process of fretting wear. Generally speaking, the TT joint has the optimal fatigue performance. The TA joint has excellent fatigue performance when the fatigue load is high, and the TH joint has excellent fatigue performance when the fatigue load is low. When the strength of the two plates is the same and the fatigue load is high, the failure form is mainly rivet fracture, and when the fatigue load is low, the failure form is mainly the lower plate fracture, while when the lower plate strength is quite different from the upper plate strength, the fatigue failure form is the lower plate fracture.
【作者单位】： 昆明理工大学创新制造技术研究所;
【基金】：国家自然科学基金项目(51565022;51565023) 国家留学基金委(201500090194) 2015年云南省博士研究生学术新人基金
【分类号】：TG146.23;TH131.1
【相似文献】
相关期刊论文 前10条
1 李国权;微动磨损的扩展与预防[J];水泥;2002年07期
2 张德坤,葛世荣;钢丝的微动磨损及其对疲劳断裂行为的影响研究[J];摩擦学学报;2004年04期
3 朱昊,李政,周仲荣;低碳钢的复合微动磨损特性研究[J];材料工程;2004年10期
4 丁红燕;戴振东;徐洮;;钛合金在水介质中的微动磨损特性研究[J];润滑与密封;2005年06期
5 白传航;;添加剂对复合锂基脂微动磨损的影响[J];合成润滑材料;2006年01期
6 屈金山;张晖;周仲荣;;不锈钢焊接区金属微动磨损行为研究[J];润滑与密封;2007年10期
7 沈燕;张德坤;王大刚;许林敏;;接触载荷对钢丝微动磨损行为影响的研究[J];摩擦学学报;2010年04期
8 王文忠;刘启春;王伟东;;微动磨损对机械的危害及预防措施[J];黑龙江冶金;2011年03期
9 i幠拘胖，
本文编号：2490689
本文链接：https://www.wllwen.com/kejilunwen/jixiegongcheng/2490689.html
