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Stability of shot p...
Stability of shot peening induced residual stresses and their influence on fatigue lifetime
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- Dalaei, Kamellia, 1975 (author)
- Chalmers University of Technology, Department of Materials and Manufacturing Technology,Chalmers tekniska högskola
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- Karlsson, Birger, 1941 (author)
- Chalmers University of Technology, Department of Materials and Manufacturing Technology,Chalmers tekniska högskola
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- Svensson, L. E. (author)
- Högskolan Väst,Avd för industriell produktion,Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2011
- 2011
- English.
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In: Materials science and engineering A. - : Elsevier BV. - 0921-5093. ; 528:3, s. 1008-1015
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http://dx.doi.org/10...
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Abstract
Subject headings
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- Mechanical surface treatment methods such as shot peening may improve the fatigue strength of materials. In this study, the effect of shot peening on strain controlled constant amplitude fatigue loading of a near pearlitic microalloyed steel was investigated. The stress amplitudes throughout the whole lifetime were followed, in addition to detailed recording of stress-strain hysteresis loops, particularly at small cycle numbers. The detailed relaxation of residual stresses and the changes in full width of half maximum (FWHM) of the X-ray peak at the surface and in depth as function of the number of cycles and plastic strain were recorded. By these techniques, the onset as well as the rate of relaxation of residual stresses could be followed at different strain amplitudes. Pronounced increase in lifetime of the shot peened specimens tested at total strain amplitude smaller than 0.3% (corresponding to 0.034% plastic strain amplitude) was achieved. This coincides with reasonably stable residual stresses at the surface and in depth. © 2010 Elsevier B.V.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Produktionsteknik, arbetsvetenskap och ergonomi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Production Engineering, Human Work Science and Ergonomics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Keyword
- Fatigue
- Micro alloyed steel
- Relaxation
- Residual stress
- Work hardening
- Alloyed steels
- Constant amplitude
- Cycle number
- Fatigue lifetime
- Fatigue loadings
- Full width of half maximum
- Mechanical surface treatment
- Microalloyed Steel
- Number of cycles
- Plastic strain
- Rate of relaxation
- Strain amplitude
- Stress amplitudes
- Stress-strain hysteresis loops
- Total strain amplitude
- X-ray peaks
- Building materials
- Fatigue of materials
- Hysteresis
- Hysteresis loops
- Plastic deformation
- Shot peening
- Strain hardening
- Surface treatment
- Residual stresses
- Manufacturing engineering
- Produktionsteknik
- Manufacturing and materials engineering
- Produktions- och materialteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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