Effect of Shot Peening on Fatigue Life Performance of a Home-made Nut

doi:10.11902/1005.4537.2020.094

Journal of Chinese Society for Corrosion and protection

2021, Vol. 41

Issue (3): 395-399 DOI: 10.11902/1005.4537.2020.094

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Effect of Shot Peening on Fatigue Life Performance of a Home-made Nut

ZHAN Yuting¹, WANG Jianhua¹, JIN Kai²(

), CHEN Jianbin³, WANG Hujun³, FANG Jun³, CHEN Weilin³, SUI Lei³

^1.College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China
^2.State-owned Wuhu Machinery Factory, Wuhu 241000, China
^3.Anhui Tianhang Electromechanical Co. , Ltd. , Wuhu 241000, China

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Abstract

The fatigue performance of the home-made nuts of 1Cr11Ni2W2MoV steel before and after shot peening was comparatively studied, while taking the commercial Shen made-nuts as reference, the two kinds of nuts are made corresponding to the same national specifications. The test results verify that the shot peening can improve the fatigue life of the nut. The stress lifting range of the home-made nut after the shot peening treatment is much higher than that of the blank ones. Under an applied larger static load ratio, the fatigue cycle times of the blank home-made nuts is lower. After shot peening, the home-made nut has a fatigue strength increment percent of 24.38% and a fatigue life profit fraction of 26.26%. Under the same shot peening condition, the fatigue resistance of the home-made nut after shot peening is significantly improved compared with the Shen made-nut of the same specification. When the applied maximum stress is 160 MPa, the cycle times of the home-made parts is increased by 87.8% compared with the Shen made-counterparts.

Key words: nut shot peening fatigue test fatigue life residual stress S-N curve

Received: 29 May 2020

ZTFLH:

TG174

Fund: Natural Science Project of Jiangsu Province(BK20170788)

Corresponding Authors: JIN Kai E-mail: jinkai@nuaa.edu.cn

About author: JIN Kai, E-mail: jinkai@nuaa.edu.cn

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	Yuting ZHAN
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	Jianbin CHEN
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	Jun FANG
	Weilin CHEN
	Lei SUI

Cite this article:

ZHAN Yuting, WANG Jianhua, JIN Kai, CHEN Jianbin, WANG Hujun, FANG Jun, CHEN Weilin, SUI Lei. Effect of Shot Peening on Fatigue Life Performance of a Home-made Nut. Journal of Chinese Society for Corrosion and protection, 2021, 41(3): 395-399.

URL:

https://www.jcscp.org/EN/10.11902/1005.4537.2020.094 OR https://www.jcscp.org/EN/Y2021/V41/I3/395

Fig.1 Fatigue test results before and after nut peening

Fig.2 Comparison of stress rise and fall of nut S-N horizontal stage before and after shot peening

Fig.3 Fracture results of unpeened nut (a) and nut after peened (b)

Fig.4 S-N curve diagrams of not shot peened (a) and shot peened (b)

Fig.5 Comparison of S-N curves before and after shot peening

Fig.6 Comparison of fatigue test results of self-made peening strengthened nuts (a) and Shen' nuts (b)

Fig.7 Comparison of fatigue characteristics of different types of nuts

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