238
Z. Wang et al.
Among the four different static loads, the material obtains the longest contact
fatigue life and the most stable fatigue performance at 1000 N. Its rated life
(L10), median life (L50) and characteristic life (L63.2) are 6.4, 8.9 and 7.4
times respectively of the corresponding life of the untreated samples.
(4) SURP treatment significantly affects the contact fatigue failure mechanism of
tappet material. Except the untreated sample the main failure mode is delamination, the main failure mode of the other treated samples is spalling. At the
static load of 1000 N, the spalling pit area of the sample is significantly smaller
than that of other samples, and the development of fatigue spalling is also relatively slower, indicating that at this parameter, SURP treatment has the most
significant inhibitory effect on the initiation and development of fatigue cracks
in the tappet material.
References
1. Zhang, G.C.: Dynamic Analysis of Diesel Engine Valve Train and Optimization Design of
Cam Profile. Tianjin University (2009)
2. Titolo, A., Tappet system for internal combustion engines having shafts with variable-profile
cams. US Patent 4693214 (1987)
3. Zhou, X., et al.: Failure analysis of CNG engine cam surface contact fatigue. In: National
Failure Analysis Conference, shanghai (2009)
4. Jiang, Y.B., Duan, Z.H., Wu, R.Z.: Analysis of contact stress between cam and tappet in
automobile engine. Mag. Equip. Mach. 01, 9–13 (2019)
5. Zhang, Y., Qu, S., Lai, F., Qin, H., Huang, L., Li, X.: Effect of quenching temperature on
microstructure and rolling contact fatigue behavior of 17Cr2Ni2MoVNb steel. Metals 8(9),
735 (2018)
6. He, C.G.: Research on Friction Fatigue Damage Mechanism and Microstructure Evolution
Behavior of Wheel Materials. Southwest Jiaotong University. pp. 157 (2018)
7. Cheng, X., Jiang, Z., Wei, D., Hao, L., Wu, H., Xia, W., Zhang, X., Luo, S., Jiang, L.: Effects
of surface preparation on tribological behaviour of a ferritic stainless steel in hot rolling. Wear
376–377, 1804–1813 (2017)
8. Tuo, W.H.: Research on laser welding technology and fatigue damage mechanism of advanced
high-strength steel for vehicles. Shanghai University of Engineering Science. pp. 85 (2016)
9. Wang, Z.: Research on the microstructure and properties of laser selective melting of Ti6Al4 V
alloy and its surface ultrasonic rolling processing. South China University of Technology.
pp. 144 (2019)
10. Li, G., Qu, S., Xie, M., Ren, Z., Li, X.: Effect of multi-pass ultrasonic surface rolling on the
mechanical and fatigue properties of HIP Ti-6Al-4 V alloy. Materials 10(2), 133 (2017)
11. Torres, M.A.S., Voorwald, H.J.C.: An evaluation of shot peening, residual stress and stress
relaxation on the fatigue life of AISI 4340 steel. Int. J. Fatigue 24(8), 877–886 (2002)
12. Zhang, F., Shangguan, X.C.: Effect of surface ultrasonic rolling processing on fatigue properties
of AISI304 austenite stainless steel. Hot Working Technol. 046(16), 136–140 (2017)
13. Hu, J.J.: Effect of Ultrasonic Rolling on Surface Integrity and Fatigue Performance of
60Si2CrVAT Spring Steel. Guizhou University. pp. 73 (2017)
14. Zhang, F., Zhao, Y.C.: Research on the improvement of surface layer properties and fatigue
properties of 45# steel by ultrasonic surface rolling. Surf. Technol. 09, 185–190 (2017). (in
Chinese)
Z. Wang et al.
Among the four different static loads, the material obtains the longest contact
fatigue life and the most stable fatigue performance at 1000 N. Its rated life
(L10), median life (L50) and characteristic life (L63.2) are 6.4, 8.9 and 7.4
times respectively of the corresponding life of the untreated samples.
(4) SURP treatment significantly affects the contact fatigue failure mechanism of
tappet material. Except the untreated sample the main failure mode is delamination, the main failure mode of the other treated samples is spalling. At the
static load of 1000 N, the spalling pit area of the sample is significantly smaller
than that of other samples, and the development of fatigue spalling is also relatively slower, indicating that at this parameter, SURP treatment has the most
significant inhibitory effect on the initiation and development of fatigue cracks
in the tappet material.
References
1. Zhang, G.C.: Dynamic Analysis of Diesel Engine Valve Train and Optimization Design of
Cam Profile. Tianjin University (2009)
2. Titolo, A., Tappet system for internal combustion engines having shafts with variable-profile
cams. US Patent 4693214 (1987)
3. Zhou, X., et al.: Failure analysis of CNG engine cam surface contact fatigue. In: National
Failure Analysis Conference, shanghai (2009)
4. Jiang, Y.B., Duan, Z.H., Wu, R.Z.: Analysis of contact stress between cam and tappet in
automobile engine. Mag. Equip. Mach. 01, 9–13 (2019)
5. Zhang, Y., Qu, S., Lai, F., Qin, H., Huang, L., Li, X.: Effect of quenching temperature on
microstructure and rolling contact fatigue behavior of 17Cr2Ni2MoVNb steel. Metals 8(9),
735 (2018)
6. He, C.G.: Research on Friction Fatigue Damage Mechanism and Microstructure Evolution
Behavior of Wheel Materials. Southwest Jiaotong University. pp. 157 (2018)
7. Cheng, X., Jiang, Z., Wei, D., Hao, L., Wu, H., Xia, W., Zhang, X., Luo, S., Jiang, L.: Effects
of surface preparation on tribological behaviour of a ferritic stainless steel in hot rolling. Wear
376–377, 1804–1813 (2017)
8. Tuo, W.H.: Research on laser welding technology and fatigue damage mechanism of advanced
high-strength steel for vehicles. Shanghai University of Engineering Science. pp. 85 (2016)
9. Wang, Z.: Research on the microstructure and properties of laser selective melting of Ti6Al4 V
alloy and its surface ultrasonic rolling processing. South China University of Technology.
pp. 144 (2019)
10. Li, G., Qu, S., Xie, M., Ren, Z., Li, X.: Effect of multi-pass ultrasonic surface rolling on the
mechanical and fatigue properties of HIP Ti-6Al-4 V alloy. Materials 10(2), 133 (2017)
11. Torres, M.A.S., Voorwald, H.J.C.: An evaluation of shot peening, residual stress and stress
relaxation on the fatigue life of AISI 4340 steel. Int. J. Fatigue 24(8), 877–886 (2002)
12. Zhang, F., Shangguan, X.C.: Effect of surface ultrasonic rolling processing on fatigue properties
of AISI304 austenite stainless steel. Hot Working Technol. 046(16), 136–140 (2017)
13. Hu, J.J.: Effect of Ultrasonic Rolling on Surface Integrity and Fatigue Performance of
60Si2CrVAT Spring Steel. Guizhou University. pp. 73 (2017)
14. Zhang, F., Zhao, Y.C.: Research on the improvement of surface layer properties and fatigue
properties of 45# steel by ultrasonic surface rolling. Surf. Technol. 09, 185–190 (2017). (in
Chinese)