Deformation-induced martensitic characteristics in 304 and 316 stainless steels during room-temperature rolling

Shrinivas, Vijay; Varma, S. K.; Murr, L. E.

doi:10.1007/bf02663916

Cited by 161 publications

(82 citation statements)

References 21 publications

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“…Shirinivas et al 6) investigated the deformation-induced martensitic transformation behavior during cold rolling in type 304 and 316 stainless steels with various grain size. As a result, the volume fraction of deformation-induced martensite increases with decreasing grain size in 304 stainless steel, while the martensite formation was insensitive to the grain size in 316 stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of Grain Size on Thermal and Mechanical Stability of Austenite in Metastable Austenitic Stainless Steel

et al. 2013

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In order to clarify the grain size dependence of mechanical stability of austenite, deformation-induced martensitic transformation behavior was investigated on uniaxial tensile deformation in a metastable austenitic stainless steel (Fe-16%Cr-10%Ni) with the grain size controlled from 1 to 80 μ m. In addition, crystallographic characteristics of deformation-induced martensite were analyzed by means of the EBSD (electron backscattering diffraction) method to discuss the variant selection rule. It was found that mechanical stability of austenite is independent of its grain size, although thermal stability of austenite is remarkably increased by grain refinement. Some special martensite variants tend to be selected in an austenite grain on the deformation-induced martensitic transformation (near single-variant transformation), and this results in the formation of a texture along tensile direction. This suggests that the most advantageous variants are selected in the deformation-induced martensitic transformation to release tensile strain and leads to the grain size independence of mechanical stability of austenite.

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Section: Introductionmentioning

confidence: 99%

Effect of Grain Size on Thermal and Mechanical Stability of Austenite in Metastable Austenitic Stainless Steel

et al. 2013

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“…It is well know that, only α ′ structure contributes to ferromagnetic part, due to straininduced γ→α ′ transformation of austenitic steels at RT and above [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. In order to evaluate the amount of α ′ , the saturation magnetization (M s ) was obtained from the plots in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…This is because alloying elements like Ni, Mn, N and Cu considerably stabilize the austenite structure while the Cr promotes α ′ structure. There are few studies on the deformation induced α ′ in 316 stainless steel [15][16][17][18][19][20]. For instance, tensile testing [15] and selective generation of local ferromagnetism by nanoindentation [19] have been reported for the type 316 stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Martensitic transformation in SUS 316LN austenitic stainless steel at RT

et al. 2008

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The results of high-accuracy magnetic measurements on SUS 316LN austenitic stainless steel compressively deformed at room-temperature (RT) are reported here. Even after the mild-deformation of ∼25% true-strain (ε t ), the ferromagnetic phase (α ′ -martensite) could be clearly observed which increased sharply on further deformation. The amount of α ′ was very small (0.18 vol.% at ε t ≈ 60%) when compared to the reported data for other grades of austenitic steels such as 304, 304L, 316 and 316L.The strain-induced α ′ -martensite is further studied by the magnetic hysteresis loops. The coercivity (H C ) and remanence (M r ) were analyzed by subtracting the paramagnetic contribution of the bulk austenite structure. While H C was found to decrease with α ′ , M r remained same (∼67 emu/g) when normalized to the volume fraction of α ′ . The decreasing H C with increasing α ′ and/ or ε t is presumed to be due to the domain wall pinning at the grain boundaries when the cluster size exceeds the domain wall width.

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“…The interphase boundaries between these two phases then act as the nucleation sites for carbide precipitation and thus accelerates both sensitization and desensitization processes [10]. It was reported [17][18][19][20] that the Martensite Induced Sensitization (MIS) in cold deformed AISI 304 austenitic stainless steel can be initiated even by a short term exposure to temperatures from 523K -773K.…”

Section: Discussionmentioning

confidence: 99%

Understanding the effect of uniaxial tensile strain on the early stages of sensitization in AISI 304 austenitic stainless steel

Chowdhury

Guchhait

Mitra

et al. 2015

Materials Chemistry and Physics

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Abstract:In the present study, an attempt has been made to understand the effect of different competing mechanisms controlling the overall degree of sensitization (DOS) of deformed austenitic stainless steel at the early stage of sensitization. The Double Loop Electrochemical Potentiokinetic Reactivation (DL-EPR) studies were performed to characterize the Degree of Sensitization (DOS) as functions of pre-defined strain and sensitization temperature. X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) were used to explain the phenomena qualitatively. A non monotonous behaviour in the variation of DOS has been observed with deformation and sensitization temperature. The presence of Deformation Induced Martensites (DIM) and their transformation into tempered martensites ( + Fe 3 C) at higher temperatures was found to play major roles in controlling the overall sensitization and desensitization processes.

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Deformation-induced martensitic characteristics in 304 and 316 stainless steels during room-temperature rolling

Cited by 161 publications

References 21 publications

Effect of Grain Size on Thermal and Mechanical Stability of Austenite in Metastable Austenitic Stainless Steel

Effect of Grain Size on Thermal and Mechanical Stability of Austenite in Metastable Austenitic Stainless Steel

Martensitic transformation in SUS 316LN austenitic stainless steel at RT

Understanding the effect of uniaxial tensile strain on the early stages of sensitization in AISI 304 austenitic stainless steel

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