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Research Papers

A Numerical and Experimental Study of Distribution of the Residual Stress on the Shot Peened Low Alloy Steel

[+] Author and Article Information
Pham Quang Trung

School of Mechanical and Aerospace
Engineering,
Nanyang Technological University,
50 Nanyang Avenue,
Singapore 639798;
Ho Chi Minh City University of Technology,
Block B11,
268 Ly Thuong Kiet Street,
Ward 14, District 10,
Ho Chi Minh City 700000, Vietnam
e-mail: quangtrung@hcmut.edu.vn

David Lee Butler

Department of Design Manufacture and
Engineering Management,
The University of Strathclyde,
Glasgow G1 1XJ, UK
e-mail: david.butler@strath.ac.uk

Sridhar Idapalapati

School of Mechanical and Aerospace
Engineering,
Nanyang Technological University,
50 Nanyang Avenue,
Singapore 639798
e-mail: msridhar@ntu.edu.sg

1Corresponding author.

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received October 3, 2017; final manuscript received April 8, 2018; published online May 24, 2018. Assoc. Editor: Antonios Kontsos.

J. Eng. Mater. Technol 140(4), 041006 (May 24, 2018) (8 pages) Paper No: MATS-17-1288; doi: 10.1115/1.4040004 History: Received October 03, 2017; Revised April 08, 2018

Shot peening is a cold working process, which is used to enhance the properties of materials, especially the fatigue life as it induces large compressive residual stresses in the subsurface of materials. In this paper, the effect of the shot peening process on the topography of the shot peened surface and the distribution of the residual stresses in the subsurface of the material was systematically investigated. A technique to estimate the shot peening coverage was employed using a finite element model which was further developed using experimental results for increased accuracy. The comparison between the numerical and experimental studies gives a good agreement of the distribution of the residual stresses in the subsurface of the shot peened material. The shot peening pressure and media size are two main factors affecting on the presence of compressive residual stresses in the subsurface of the material.

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References

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Bathias, C. , and Pineau, A. , 2010, Fatigue of Materials and Structures: Fundamentals, Wiley, Hoboken, NJ.
Trung, P. Q. , Khun, N. W. , and Butler, D. L. , 2016, “ Effects of Shot Peening Pressure, Media Type and Double Shot Peening on the Microstructure, Mechanical and Tribological Properties of Low-Alloy Steel,” Surf. Topogr. Metrol. Prop., 4(4), p. 045001. [CrossRef]
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ISO, 2012, “ Geometrical Product Specifications (GPS)—Surface Texture: Areal—Part 2: Terms, Definitions and Surface Texture Parameters,” International Organization for Standardization, Geneva, Switzerland, Standard No. ISO 25178-2:2012. https://www.iso.org/standard/42785.html
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Figures

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Fig. 8

Residual stress distribution of the S230 shot peened samples on plane y = 0 under various shot peening pressures: (a) S230-10, (b) S230-30, and (c) S230-50

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Fig. 9

Residual stress distribution of the S110 shot peened samples on plane y = 0 under various shot peening pressures: (a) S110-10, (b) S110-30, and (c) S110-50

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Fig. 1

(a) The velocity of shot and dynamic energy of each S230 and S110 steel shot measured under different shot peening pressures and the scanning electron microscope micrograph showing overviews of media, (b) S230, and (c) S110

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Fig. 2

Coordinates of impact shots employed to obtain full coverage (>98%): (a) S230 media and (b) S110 media

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Fig. 7

Areal surface roughness parameter Sa of the shot peened AISI 4340 steel samples as a function of shot peening pressure

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Fig. 3

Finite element model of multiple-shot impacts: (a) S230 media, (b) S110 media, and (c) double peening process

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Fig. 4

Surface topographies of shot peened AISI 4340 steel sample shot peened by S230 media (Top: numerical study and Bottom: experimental result): (a) S230-10, (b) S230-30, and (c) S230-50

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Fig. 5

Surface topographies of shot peened AISI 4340 steel sample shot peened by S110 media (Top: numerical study and Bottom: experimental result): (a) S110-10, (b) S110-30, and (c) S110-50

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Fig. 6

Surface topographies of shot peened AISI 4340 steel sample shot peened by double shot peening process (Top: numerical study and Bottom: experimental result): (a) DP-10-20, (b) DP-30-20, and (c) DP-50-20

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Fig. 12

Average longitudinal residual stress distribution under various shot peening pressures in the experimental study: (a) S230 shot peened samples, (b) S110 shot peened samples, and (c) comparison between S230 shot peened samples and double shot peened samples

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Fig. 10

Residual stress distribution of the double shot peened samples on plane y = 0 under various shot peening pressures: (a) DP-10-20, (b) DP-30-20, and (c) DP-50-20

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Fig. 11

Average longitudinal residual stress distribution under various shot peening pressures in the numerical study: (a) S230 shot peened samples, (b) S110 shot peened samples, and (c) double shot peened samples

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