Cyclic deformation and near surface microstructures of shot peened or deep rolled austenitic stainless steel AISI 304

Altenberger, I.; Scholtes, Berthold; Martin, Ulrich; Oettel, H.

doi:10.1016/s0921-5093(98)01121-6

Cited by 256 publications

(120 citation statements)

References 21 publications

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“…Authors in [9] shows X-ray difractogram after a deep rolling of 304L steel, which according to α'(110)/ γ( 111) ratio can be classified in group (iv), and estimated the martensitic volume fraction on 27,5%. Similar results are obtained from Altenberger and all [10] after deep rolling.…”

Section: Resultssupporting

confidence: 86%

Experimental research on the effect of the ball burnishing process, using new kinematical scheme on hardness and phase composition of surface layer of AISI 304L stainless steel

2017

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Abstract. In this paper, experimental results about hardness and phase composition of surface layer of AISI 304L SS, machined by using ball burnishing process, conducted under a new kinematic scheme, are presented. The effect of different combinations of the process regime parameters on the amount of strain induced martensitic phase, is discussed. The amounts of austenitic and strain induced martensitic phases are identified by x-ray diffractometer. Micro hardness along the depth of the hardened layer is measured. Conclusions about the influence of the ball burnishing process on strain induced martensitic phase are given.

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Section: Resultssupporting

confidence: 86%

Experimental research on the effect of the ball burnishing process, using new kinematical scheme on hardness and phase composition of surface layer of AISI 304L stainless steel

2017

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“…The beneficial effect of shot peening is a result of coupling of the residual stresses and strain hardening [7] although the relative beneficial contributions of each are still controversial [13]. It has been reported that the beneficial effect of strain hardening is in increasing the initiation life since high dislocation densities in the cold worked region result in higher yield stresses [7,14] and thus lower plastic strain amplitudes under stress controlled cycling [15];…”

Section: Introductionmentioning

confidence: 99%

The effect of shot peening on notched low cycle fatigue

Soady

Mellor

Shackleton

et al. 2011

Materials Science and Engineering: A

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The improvement in low cycle fatigue life created by shot peening ferritic heat resistant steel was investigated in components of varying geometries based on those found in conventional power station steam turbine blades. It was found that the shape of the component did not affect the efficacy of the shot peening process, which was found to be beneficial even under the high stress amplitude three point bend loads applied. Furthermore, by varying the shot peening process parameters and considering fatigue life it has been shown that the three surface effects of shot peening; roughening, strain hardening and the generation of a compressive residual stress field must be included in remnant life models as physically separate entities. The compressive residual stress field during plane bending low cycle fatigue has been experimentally determined using X-ray diffraction at varying life fractions and found to be retained in a direction parallel to that of loading and to only relax to 80% of its original magnitude in a direction orthogonal to loading. This result, which contributes to the retention of fatigue life improvement in low cycle fatigue conditions, has been discussed in light of the specific stress distribution applied to the components. The ultimate aim of the research is to apply these results in a life assessment methodology which can be used to justify a reduction in the length of scheduled plant overhauls. This will result in significant cost savings for the generating utility. KeywordsLow cycle fatigue, stress concentration, shot peening, residual stresses, ferritic heat resisting

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“…The ε martensite is hcp and paramagnetic while α' is bcc and ferromagnetic. The transformation sequence γ → ε → α' was proposed by some authors 1,3 for AISI 304 and 316 deformed by tension and rolling. On the other hand the direct transformation γ → α' through dislocation reactions was found to be possible 3 .…”

Section: Introductionmentioning

confidence: 99%

“…The transformation sequence γ → ε → α' was proposed by some authors 1,3 for AISI 304 and 316 deformed by tension and rolling. On the other hand the direct transformation γ → α' through dislocation reactions was found to be possible 3 . The amount of ε and α' martensite depends on processing parameters such as stress state, temperature and rate of deformation 4 .…”

Section: Introductionmentioning

confidence: 99%

Deformation induced martensite in an AISI 301LN stainless steel: characterization and influence on pitting corrosion resistance

et al. 2007

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In austenitic stainless steels, plastic deformation can induce martensite formation. The induced martensite is related to the austenite (γ) instability at temperatures close or below room temperature. The metastability of austenite stainless steels increases with the decreasing of stacking fault energy (SFE). In this work, the deformation induced martensite was analyzed by X ray diffraction, electron back scatter diffraction (EBSD), magnetic methods and atomic force microscope (AFM) in samples of a low SFE austenitic stainless steel, AISI 301LN and compared with a medium SFE stainless steel, AISI 316L. Both techniques, X ray diffraction and EBSD, presented similar quantities for the α'-martensite. Texture results indicate that the crystallographic orientation of the formed α'-martensite is {001}<110> and {103}<110>. The morphology of α'-martensite was analyzed by AFM. Corrosion tests showed that deformation reduces pitting corrosion and generalized corrosion resistance in both steels.

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Cyclic deformation and near surface microstructures of shot peened or deep rolled austenitic stainless steel AISI 304

Cited by 256 publications

References 21 publications

Experimental research on the effect of the ball burnishing process, using new kinematical scheme on hardness and phase composition of surface layer of AISI 304L stainless steel

Experimental research on the effect of the ball burnishing process, using new kinematical scheme on hardness and phase composition of surface layer of AISI 304L stainless steel

The effect of shot peening on notched low cycle fatigue

Deformation induced martensite in an AISI 301LN stainless steel: characterization and influence on pitting corrosion resistance

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