Fatigue properties and fracture behavior of shot peened 55Si2MnMoV spring steel

doi:10.13251/j.issn.0254-6051.2024.12.038

Abstract

Abstract: Shot peening and shot peening-polishing treatments were applied to the 55Si2MnMoV spring steel. The surface roughness, hardness, and residual stress were characterized by using laser confocal microscopy, microhardness tester and X-ray residual stress analyzer. Fatigue tests were conducted to plot S-N curves and observe fatigue fracture morphology, thereby investigating the fatigue property of the 55Si2MnMoV spring steel subjected to shot peening. The results indicate that shot peening improves the fatigue property of the spring steel specimens. Compared to the untreated specimen, the fatigue strength of the both shot peened and shot peened-polished specimens is increased by 16.7%. Although the surface roughness of the shot peened-polished specimens is lower than that of the shot peened specimens, their fatigue strength remain the same. Shot peening treatments do not change the fatigue fracture mechanism, as all the specimens exhibit a fracture mode initiated by surface cracks. The residual compressive stress in the hardened layer of the shot peened specimens is the primary factor contributing to the enhanced fatigue strength.

Key words: shot peening, 55Si2MnMoV spring steel, surface roughness, residual stress, fatigue strength

CLC Number:

TG113.25

Jia Jinke, Li Xing, Zhang Jiwang. Fatigue properties and fracture behavior of shot peened 55Si2MnMoV spring steel[J]. Heat Treatment of Metals, 2024, 49(12): 237-242.

References

[1]Karr U, Sandaiji Y, Tanegashima R, et al. Inclusion initiated fracture in spring steel under axial and torsion very high cycle fatigue loading at different load ratios[J]. International Journal of Fatigue, 2020, 134: 105525. 1-105525. 11.
[2]徐德祥, 尹钟大. 高强度弹簧钢的发展现状和趋势[J]. 钢铁, 2004, 39(1): 67-71.
Xu Dexiang, Yin Zhongda. The tendency to high strength of spring steels and the effect of alloying elements[J]. Iron and Steel, 2004, 39(1): 67-71.
[3]郝立群, 惠卫军, 项金钟, 等. 两种不同冶金工艺生产的60Si2CrVA弹簧钢的高周疲劳性能[J]. 钢铁, 2009, 44(2): 64-68.
Hao Liqun, Hui Weijun, Xiang Jinzhong, et al. High-cycle fatigue properties of 60Si2CrVA spring steels produced by two different metallurgical processes[J]. Iron and Steel, 2009, 44(2): 64-68.
[4]Tian J, Wang W, Li H, et al. Understanding main factors controlling high cycle fatigue crack initiation and propagation of high strength maraging stainless steels with Ti addition[J]. Materials Science and Engineering A, 2021, 805: 140589.
[5]Kubit A, Bucior M, Zielecki W, et al. The impact of heat treatment and shot peening on the fatigue strength of 51CrV4 steel[J]. Procedia Structural Integrity, 2016, 2: 3330-3336.
[6]Farrahi G H, Lebrijn J L, Couratin D. Effect of shot peening on residual stress and fatigue life of a spring steel[J]. Fatigue and Fracture of Engineering Materials and Structures, 1995, 18(2): 211-220.
[7]Ren C X, Wang D Q Q, Wang Q, et al. Enhanced bending fatigue resistance of a 50CrMnMoVNb spring steel with decarburized layer by surface spinning strengthening[J]. International Journal of Fatigue, 2019, 124: 277-287.
[8]刘建睿, 严宏志, 李算, 等. 离子渗氮工艺参数对4Cr5MoSiV钢表层组织与性能的影响[J]. 表面技术, 2019, 48(8): 199-205.
Liu Jianrui, Yan Hongzhi, Li Suan, et al. Effect of ion nitriding process parameters on surface properties of 4Cr5MoSiV steel[J]. Surface Technology, 2019, 48(8): 199-205.
[9]Hatamleh O, Lyons J, Forman R. Laser peening and shot peening effects on fatigue life and surface roughness of friction stir welded 7075-T7351 aluminum[J]. Fatigue and Fracture of Engineering Materials and Structures, 2010, 30(2): 115-130.
[10]Xia B, Wang B, Zhang P, et al. Improving the high-cycle fatigue life of a high-strength spring steel for automobiles by suitable shot peening and heat treatment[J]. International Journal of Fatigue, 2022,161: 106891.
[11]Scuracchio B G, Lima N B D, Schoen C G. Role of residual stresses induced by double peening on fatigue durability of automotive leaf springs[J]. Materials and Design, 2013, 47: 672-676.
[12]Irizalp S G, Saklakoglu N, Baris F, et al. Effect of shot peening on residual stress distribution and microstructure evolution of artificially defected 50CrV4 steel[J]. Journal of Materials Engineering and Performance, 2020, 29(11): 7607-7616.
[13]Wildeis A, Christ H J, Brandt R. Influence of residual stresses on the crack initiation and short crack propagation in a martensitic spring steel[J]. Metals, 2022, 12(7): 1085.
[14]Fragoudakis R, Saigal A, Savaidis G, et al. Fatigue assessment and failure analysis of shot-peened leaf springs[J]. Fatigue and Fracture of Engineering Materials and Structures, 2013, 36(2): 92-101.
[15]Myung N J, Wang L, Choi N S. High-cycle and very high-cycle bending fatigue strength of shot peened spring steel[J]. Journal of Mechanical Science and Technology, 2021, 35(11): 4963-4973.
[16]Higounenc O. Correlation of shot peening parameters to surface characteristic[C]//ICSP-9: Shot Peening. 2005: 28-35.
[17]李行, 张继旺, 易科尖, 等. 喷丸处理EA4T车轴钢疲劳性能和残余应力松弛行为研究[J]. 表面技术, 2019, 48(10): 244-250, 266.
Li Xing, Zhang Jiwang, Yi Kejian, et al. Fatigue properties and residual stress relaxation behavior of shot peened EA4T axle steel[J]. Surface Technology, 2019, 48(10): 244-250, 266.
[18]Inglis C E, Esq M A. Stresses in a plate due to the presence of cracks and sharp corners[C]//The Spring Meetings of the Fifty-fourth Session. Institution of Naval Architeets. 1913: 219-241.
[19]Xiang Y, Liu Y. Mechanism modelling of shot peening effect on fatigue life prediction[J]. Fatigue and Fracture of Engineering Materials and Structures, 2010, 33(2): 116-125.
[20]王仁智. 金属材料的喷丸强化原理及其强化机理综述[J]. 中国表面工程, 2012, 25(6): 1-9.
Wang Renzhi. Overview on the shot peening principle and its strengthening mechanisms for metallic materials[J]. China Surface Engineering, 2012, 25(6): 1-9.
[21]Kim J C, Cheong S K, Noguchi H. Residual stress relaxation and low- and high-cycle fatigue behavior of shot-peened medium-carbon steel[J]. International Journal of Fatigue, 2013, 56(11): 114-122.
[22]Schijve J. Fatigue of Structures and Materials[M]. 2nd Edition. Netherlands: Springer, 2008.
[23]Song P S, Wen C C. Crack closure and crack growth behaviour in shot peened fatigued specimen[J]. Engineering Fracture Mechanics, 1999, 63(3): 295-304.
[24]Dalaei K, Karlsson B, Svensson L E. Stability of shot peening induced residual stresses and their influence on fatigue lifetime[J]. Materials Science and Engineering A, 2011, 528(3): 1008-1015.
[25]Bagherifard S, Guagliano M. Fatigue behavior of a low-alloy steel with nanostructured surface obtained by severe shot peening[J]. Engineering Fracture Mechanics, 2012, 81: 56-68.
[26]Goodman J. Mechanics Applied to Engineering[M]. London: Longmans Green, 1941.
[27]Kuno T, Wakita M, Hasegawa T, et al. Effect of hardness and shot peening on torsional fatigue strength of high strength spring steel[J]. Transactions of Japan Society of Spring Engineers, 2010, 2010(55): 19-24.