The influence of substructure on the elevated and room temperature strength of a 26 Cr-1 Mo ferritic stainless steel

Schmidt, C.; Young, Conrad M.; Walser, Bruno; Klundt, R.; Sherby, O. D.

doi:10.1007/bf02643353

Cited by 46 publications

(15 citation statements)

References 15 publications

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“…During straining, the misorientation between neighboring subgrains gradually increases because of the migration and the merging of low angle dislocation walls, which results in the formation of high angle boundaries at higher strains. This theory was also supported by Schmidt, [23] who found an increase of the subgrain misorientation angle in a ferritic stainless steel during high temperature straining. Glover and Sellars [9] proposed that there was a transition from dynamic recrystallization to dynamic recovery of ferrite based on the value of Zener-Hollomon parameter (Z), and they found that ferrite was dynamically recrystallized when Z parameter was smaller than~10 15 s À1 for a zone-refined iron with a grain size of~800 lm.…”

Section: A Microstructure Evolution Of the Fadp Structure During Hotsupporting

confidence: 70%

Microstructure Evolution of a Medium Manganese Steel During Thermomechanical Processing

Sun

Aydın

Fazeli

et al. 2016

Metall Mater Trans A

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An as-cast Fe-0.2C-10Mn-3Si-3Al medium manganese steel with a ferrite plus austenite duplex microstructure was subjected to hot compression tests at deformation temperatures within two-phase (a + c) range and various strain rates. The microstructure evolution of the experimental steel during hot deformation was investigated. The flow curves were characterized by a discontinuous yielding at the beginning of plastic deformation, followed by a weak work hardening to a peak and a subsequent mild softening stage. Two restoration processes took place during hot deformation, namely dynamic recrystallization (DRX) of austenite and continuous dynamic recrystallization of ferrite. The DRX of austenite was believed to dominate the softening stage of the flow curves. The discontinuous yielding stemmed from the existing Kurdjumov-Sachs (K-S) orientation relationship between ferrite and austenite in the initial undeformed microstructure, which gradually weakened during subsequent deformation.

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Section: A Microstructure Evolution Of the Fadp Structure During Hotsupporting

confidence: 70%

Microstructure Evolution of a Medium Manganese Steel During Thermomechanical Processing

Sun

Aydın

Fazeli

et al. 2016

Metall Mater Trans A

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“…Although the substructures grains (e.g., grains A1 through A4 in Figure 7(b)). Subgrain rotation was also observed by others in similar Fe alloys [13,15] formed at the early stage of deformation had fairly different sizes at different temperatures, the sub-boundaries often and in Mg [5] and Al [16] alloys. The migration and coalescence of sub-boundaries would often be involved in the subgrain appeared parallel to the grain boundaries and the spacing between them increased with increasing distance from the rotation process, as in the case of a Mg alloy.…”

Section: B Substructural Changes During Deformation At 900 њCsupporting

confidence: 59%

Substructural changes during hot deformation of an Fe-26Cr ferritic stainless steel

Gao¹,

Xu²,

Song

et al. 2000

Metall Mater Trans A

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Dynamic softening and substructural changes during hot deformation of a ferritic Fe-26Cr stainless steel were studied. The flow stress increased to reach a steady state in all the cases and the steadystate stress decreased with decreasing Z, the Zener-Hollomon parameter. A constant subgrain size was observed to correspond to the steady-state flow and the steady-state subgrain size increased with decreasing Z. Substructure examinations revealed that elongated, pancake-shaped subgrains formed in the early stage of deformation. Straight sub-boundaries and equiaxed subgrains developed progressively with strain, leading eventually to a stable substructure at strains greater than 0.7. During deformation at 1100 ЊC, dynamic recrystallization occurred by the migration and coalescence of subboundaries. Dynamic recovery dominated during deformation at 900 ЊC, resulting in the formation of fine equiaxed subgrains. Based on microstructural observations, the process of substructural changes during hot deformation was described by a schematic diagram.

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“…In Fe26Cr-1Mo, (bcc), [204] the flow stress decreases 33% across the strain-range 2-16, which is greater than that in Al; however, the change in Taylor factor with texture formation in bcc could be different from that in fcc [205]. The report indicated that no preferred orientation formed but this is likely a misinterpretation.…”

Section: Discussionmentioning

confidence: 99%

Current issues in recrystallization: a review

Doherty¹,

Hughes²,

Humphreys³

et al. 1997

Materials Science and Engineering: A

2,063

623

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The current understanding of the fundamentals of recrystallization is summarized. This includes understanding the as-deformed state. Several aspects of recrystallization are described: nucleation and growth, the development of misorientation during deformation, continuous, dynamic, and geometric dynamic recrystallization, particle effects, and texture. This article is authored by the leading experts in these areas. The subjects are discussed individually and recommendations for further study are listed in the final section. © 1997 Elsevier Science S.A.

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The influence of substructure on the elevated and room temperature strength of a 26 Cr-1 Mo ferritic stainless steel

Cited by 46 publications

References 15 publications

Microstructure Evolution of a Medium Manganese Steel During Thermomechanical Processing

Microstructure Evolution of a Medium Manganese Steel During Thermomechanical Processing

Substructural changes during hot deformation of an Fe-26Cr ferritic stainless steel

Current issues in recrystallization: a review

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