Cyclic deformation and near surface microstructures of normalized shot peened steel SAE 1045

Ullrich, M.; Altenberger, I.; Scholtes, Berthold; Kremmer, K.; Oettel, H.

doi:10.1016/s0921-5093(97)00755-7

Cited by 73 publications

(33 citation statements)

References 6 publications

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“…3 and 5 is a possible relationship between the microhardness profiles and residual stresses generated in the surfaces, which helps to support the hypothesis that the thermal effect contribution was less significant. When plastic deformation inhomogeneity is the only reason for the residual stress, the microhardness profile follows a pattern, similar to those obtained in this work, and verified in other processes, such as shoot peening (Martin et al, 1998). Thus, it is possible to conclude that plastic deformation due to punching tests had little influence of thermal effects.…”

Section: Resultssupporting

confidence: 87%

“…Although Martin et al (1998) pointed out that the microstructural interpretation of the microhardness profile is difficult, a relationship between this kind of measurement and the residual stresses is possible when no phase transformation is present. This statement was confirmed by the Mamalis et al (1988), who studied the residual stresses and microhardness profiles of high-strength steel after electro-discharge machine (EDM) and balldrop forming.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plastic deformation analysis of low-carbon steel due to metal hole punching using coated and uncoated tools

Pintaúde¹,

Beltrão²,

Faria³

2009

J. Braz. Soc. Mech. Sci. & Eng.

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Plastic deformation analysis of low-carbon steel due to metal hole punching using coated and uncoated tools

Pintaúde¹,

Beltrão²,

Faria³

2009

J. Braz. Soc. Mech. Sci. & Eng.

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“…However, this is true as long as the density and size of surface defects induced by shot peening remain not significant. Otherwise the degradation of the fatigue resistance behavior of excessively shot peened components have been clearly observed [17,18,19].…”

Section: Introductionmentioning

confidence: 99%

Effect of shot peening on metastable austenitic stainless steels

Fargas

Roa

Mateo

2015

Materials Science and Engineering: A

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In this work, shot peening was performed in a metastable austenitic stainless steel EN 1.4318 (AISI 301LN) in order to evaluate its effect on austenite to martensite phase transformation and also the influence on the fatigue limit. Two different steel conditions were considered: annealed, i.e., with a fully austenitic microstructure, and cold rolled, consisting of a mixture of austenite and martensite. X-ray diffraction, electron backscattered diffraction and focus ion beam, as well as nanoindentation techniques, were used to elucidate deformation mechanisms activated during shot peening and correlate with fatigue response. Results pointed out that extensive plastic deformation and phase transformation developed in annealed specimens as a consequence of shot peening.However, the increase of roughness and the generation of microcracks led to a limited fatigue limit improvement. In contrast, shot peened cold rolled specimens exhibited enhanced fatigue limit. In the latter case, the main factor that determined the influence on the fatigue response was the distance from the injector, followed successively by the exit speed of the shots and the coverage factor.

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“…At higher stress amplitudes the residual stresses imparted by the peening process are often quickly overcome [21] whilst at lower stress amplitudes the peening can give an order of magnitude improvement in resistance to fatigue life. Figure 5c shows that the improvement in fatigue life is good over the whole spectrum of stress amplitudes tested here.…”

mentioning

confidence: 99%

Effect of shot peening on the fatigue behaviour of cast magnesium A8

Barry

Hainsworth

Fitzpatrick

2009

Materials Science and Engineering: A

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractShot peening is known to improve the fatigue performance of structural metallic materials. The improvement in fatigue life is derived primarily from compressive residual stresses that are introduced into the near-surface of the components and which hinder crack initiation and growth.Magnesium alloys are finding increasing use in automotive applications, but their relatively low strength means that they are highly susceptible to fatigue failures. This is particularly the case for cast alloys which may contain high levels of porosity. Shot peening may be of use, but the beneficial effect of the compressive stress may be offset by the surface damage associated with peening of a soft material.In this study the fatigue life of sand-cast A8 magnesium alloy has been investigated before and after a shot peening treatment to investigate whether shot peening is beneficial for a component with this combination of relatively low strength and relatively poor initial surface finish. Previous studies into the effect of shot peening on magnesium alloys have been limited to wrought alloys and there has been little work on the influence of shot peening on cast magnesium alloys. The residual stress before and after peening was determined by incremental hole drilling which shows that the peening process generated a compressive residual stress in the cast specimens. The fatigue results show that the fatigue life is significantly improved by the shot peening process, and there is also an improvement in the endurance limit. An increase in the surface roughness of the samples was found after peening but this was not found to be detrimental to the fatigue performance.

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Cyclic deformation and near surface microstructures of normalized shot peened steel SAE 1045

Cited by 73 publications

References 6 publications

Plastic deformation analysis of low-carbon steel due to metal hole punching using coated and uncoated tools

Plastic deformation analysis of low-carbon steel due to metal hole punching using coated and uncoated tools

Effect of shot peening on metastable austenitic stainless steels

Effect of shot peening on the fatigue behaviour of cast magnesium A8

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