Effective Stresses and Microstructure in Cyclically Deformed 316l Austenitic Stainless Steel: Effect of Temperature and Nitrogen Content

Vogt, Jean‐Bernard; Magnin, T.; Foct, J.

doi:10.1111/j.1460-2695.1993.tb00766.x

Cited by 66 publications

(26 citation statements)

References 18 publications

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“…Austenitic steels of type 316L (stacking-fault energy Ϸ 0.023 Jm Ϫ2 [7] ) are found to form spatial dislocation structures such as loop patches, PSBs, and cell structures after cycling at room temperature. [6,7,9,12] In this study of SDSS, only planar dislocation structures are observed in the austenite grains in the low-amplitude regime. Initialization of cross slip only occurs when the plastic-strain amplitude applied is high enough.…”

Section: The Csscmentioning

confidence: 91%

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Fatigue deformation-induced response in a superduplex stainless steel

Goh

Tick-Hon

2002

Metall Mater Trans A

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The cyclic deformation behavior of SAF 2507 superduplex stainless steel (SDSS) was studied under constant plastic-strain amplitudes. The cyclic hardening/softening curves show initial hardening, followed by softening and, finally, saturation behavior. Two regimes can be differentiated in the cyclic stress-strain curve (CSSC) of SDSS. The transition point at which the cyclic strain-hardening rate changes is identified to be p /2 ϭ 7 ϫ 10 Ϫ3 . Transmission electron microscopy (TEM) results on dislocation structures suggested that there is a close relationship between the CSSC, hardening/ softening curves, and the dislocation substructure evolution. In the low-plastic-strain-amplitude regime of the CSSC, the dislocation activity in the austenite grains is found to be higher than that in the ferrite grains. At higher plastic strain amplitudes, low-energy dislocation structures are found in the ferrite grains, while clusters and bundles of dislocations can be observed in the austenite grains. Strain localization due to formation of these structures resulted in a decrease in the cyclic strain-hardening rate within the high-plastic-strain-amplitude regime. Dislocation substructure evolution is also used to explain the shape of the hardening/softening curve.

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Section: The Csscmentioning

confidence: 91%

“…The CSSCs of DSS were mainly ritic, and duplex stainless steels (DSS) has been discussed obtained at plastic-strain amplitudes lower than 10 Ϫ2 . in quite a few articles, [1][2][3][4][5]7,9,12,22,23] …”

Section: Introductionmentioning

confidence: 99%

Fatigue deformation-induced response in a superduplex stainless steel

Goh

Tick-Hon

2002

Metall Mater Trans A

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“…Further examples of austenitic stainless steel microstructures formed at various deformation temperatures may be found in [10][11][12][13][14][15][16]. Figure 4 summarizes the temperature dependence of deformation-induced microstructural changes in austenitic steels.…”

Section: Relationship Between the Stacking Fault Energy (Sfe) And Defmentioning

confidence: 99%

Considerations in the Design of Formable Austenitic Stainless Steels Based on Deformation-Induced Processes

Mola

2017

Austenitic Stainless Steels - New Aspects

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The temperature dependence of tensile elongation in austenitic steels is discussed in view of the relationship between the stacking fault energy and deformation-induced processes. It is shown that the maximum tensile elongation is achieved in the vicinity of M d γ → α′ temperature. The influence of alloying elements on the temperature dependence of tensile elongation can therefore be analyzed with regard to their influence on the M d γ → α′ temperature. In this regard, majority of alloying elements including C and N decrease the temperature associated with highest tensile elongation. Due to the high efficiency of C and N in increasing the stability of austenite, approaches toward the development of high-interstitial austenitic stainless steels containing minimal amounts of substitutional alloying elements are discussed. Finally, some of the challenges associated with the processing of high-interstitial austenitic stainless steels are reviewed.

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“…Metastable austenitic stainless steels can be considered as TRIP (Transformation Induced Plasticity) steels because plastic deformation, either during forming or under service conditions, can lead to a strain-induced transformation from austenite to martensite [1]. Two types of martensite may form in austenitic stainless steels: ε and α'.…”

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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Effective Stresses and Microstructure in Cyclically Deformed 316l Austenitic Stainless Steel: Effect of Temperature and Nitrogen Content

Cited by 66 publications

References 18 publications

Fatigue deformation-induced response in a superduplex stainless steel

Fatigue deformation-induced response in a superduplex stainless steel

Considerations in the Design of Formable Austenitic Stainless Steels Based on Deformation-Induced Processes

Effect of shot peening on metastable austenitic stainless steels

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