1 昆明理工大学机电工程学院,昆明 650500; 2 Department of Mechanical Engineering, Blekinge Tekniska Högskola, Karlskrona 37179;
Mechanical Performance and Fretting Behavior of Self-piercing Riveted Joint of TA1 Titanium Alloy
ZHAO Lun1,2, HE Xiaocong1, ZHANG Xianlian1, DING Yanfang1, LIU Yang1, DENG Cong1
1 Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500; 2 Department of Mechanical Engineering, Blekinge Tekniska Högskola, Karlskrona 37179;
Abstract: The present work mainly focused on the self-piercing riveted (SPR) joint of TA1 titanium alloy. The tensile-shear test and fatigue test were conducted to analyze the mechanical performance of the joints, and the tensile-shear failure mechanism, fatigue failure mechanism and fretting behavior of the joints were investigated at a microscopic level by scanning electron microscope. The results exhibited that the tensile-shear failure mode assumed rivet shank pull-out from the bottom sheet and some degree of fracture located at the rivet neck, while the main fatigue failure mode was fracture of the upper sheet whose fatigue limit was approximately 1.18 kN. Fatigue cracks initiated at pierced sheet surface’s contact site with rivet head, and were propagated along the sheet thickness direction and sheet width direction under continuous fretting wear and fatigue cyclic stress, and finally resulted in joint break. The severity of fretting wear could influence fatigue failure mode of the joints. Fretting wear of the upper sheet initiated from W direction of sheet width, and spread gradually to L direction of sheet length with fretting wear process.
1 Zhang X, He X, Xing B, et al. Influence of heat treatment on fatigue performances for self-piercing riveting similar and dissimilar titanium, aluminium and copper alloys [J]. Materials & Design,2016,97:108. 2 Chung C, Kim H. Fatigue strength of self-piercing riveted joint in lap-shear specimens of aluminium and steel sheets [J]. Fatigue and Fracture of Engineering Materials and Structures,2016,39:1105. 3 Zhang X, He X, Cheng Q, et al. Investigation on the static strength of self-piercing riveted joints in dissimilar sheets about 1420 aluminum-lithium alloy [J]. Materials Review B: Research Papers,2015,29(12):76(in Chinese). 张先炼,何晓聪,程强,等.1420铝锂合金自冲铆异质组合接头静力学性能研究[J].材料导报:研究篇,2015,29(12):76. 4 Kang S, Kim H. Fatigue strength evaluation of self-piercing riveted Al-5052 joints under different specimen configurations [J]. International Journal of Fatigue,2015,80:58. 5 Huang L, Shi Y, Guo H, et al. Fatigue behavior and life prediction of self-piercing riveted joint [J]. International Journal of Fatigue,2016,88:96. 6 Gay A, Fabien L, Sebastien B, et al. Fatigue performance of a self-piercing rivet joint between aluminium and glass fiber reinforced thermoplastic composite [J]. International Journal of Fatigue,2016,83:127. 7 Zhao L, He X, Xing B, et al. Influence of sheet thickness on the fatigue behavior and fretting of self-piercing riveted joints in aluminum alloy 5052 [J]. Materials & Design,2015,87:1010. 8 Han L, Chrysanthou A, Young K, et al. Characterization of fretting fatigue in self-piercing riveted aluminium alloy sheets [J]. Fatigue and Fracture of Engineering Materials and Structures,2006,29:646. 9 Chen Y, Han L, Chrysanthou A, et al. Fretting wear in self-pier-cing riveted aluminium alloy sheet[J]. Wear,2003,255(7-12):1463. 10 Han L, Chrysanthou A, O’Sullivan J, et al. Fretting behaviour of self-piercing riveted aluminium alloy joints under different interfiacial conditions [J]. Materials & Design,2006,27(3):200. 11 He X, Wang Y, Lu Y, et al. Self-piercing riveting of similar and dissimilar titanium sheet materials [J]. The International Journal of Advanced Manufacturing Technology,2015,80(9):2105. 12 Xing B, He X, Zeng K, et al. Mechanical properties of self-piercing riveted joints in aluminium alloy 5052 [J]. The International Journal of Advanced Manufacturing Technology,2014,75(1):351. 13 He X, Zhao L, Deng C, et al. Self-piercing riveting of similar and dissimilar metal sheets of aluminium alloy and copper alloy [J]. Materials & Design,2015,65:923. 14 Dahlberg T, Ekberg A. Failure fracture fatigue: An introduction [M]. Lund: Studentlitteratur AB,2002.
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2018, Vol. 32 
