Some Insights Into the Ratcheting Behavior of P91 Steel at Elevated Temperature.
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| Title: | Some Insights Into the Ratcheting Behavior of P91 Steel at Elevated Temperature. |
|---|---|
| Authors: | Dhiman, Rajat1 (AUTHOR) rajat.19mez0002@iitrpr.ac.in, Roy, Samir Chandra1 (AUTHOR) |
| Source: | Fatigue & Fracture of Engineering Materials & Structures. Mar2026, Vol. 49 Issue 3, p1050-1062. 13p. |
| Subjects: | Strains & stresses (Mechanics), Dislocation structure, Material plasticity, Hysteresis loop, Chromium molybdenum steel, Ratchets, High temperatures, Mechanical failures |
| Abstract: | This article highlights the importance of "opening strain," which quantifies the amount and direction of net cyclic plastic deformation, in describing the ratcheting behavior of materials. Ratcheting experiments were conducted on P91 steel at 823 K with varying stress amplitude (290–380 MPa) and mean stress (0–120 MPa). Analysis revealed that ratcheting occurs due to unequal cyclic tensile and compressive plastic strains, leading to non‐closure of hysteresis loops, quantified as "opening strain." The ratcheting behavior of P91 steel exhibited an initial quasi‐stable phase followed by an acceleration phase before failure. Transmission electron microscopic investigation of interrupted test specimens highlighted that dislocation tangles, forests, and networks were associated with minimal strain accumulation in the stable phase. Further investigation of the failed specimens confirmed that the formation of incipient dislocation cells and recrystallized subgrains provided strain‐free paths for dislocation motion and significant strain accumulation in the acceleration phase. Summary: Ratcheting occurs due to unequal cyclic tensile and compressive plastic strains."Opening strain" quantifies the amount and direction of net plastic deformation.In P91 steel, strain in the stable phase is limited by dislocation tangles and networks.High strain accumulates in the acceleration phase due to dislocation cells and subgrains. [ABSTRACT FROM AUTHOR] |
| Copyright of Fatigue & Fracture of Engineering Materials & Structures is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 191377265 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Some Insights Into the Ratcheting Behavior of P91 Steel at Elevated Temperature. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Dhiman%2C+Rajat%22">Dhiman, Rajat</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> rajat.19mez0002@iitrpr.ac.in</i><br /><searchLink fieldCode="AR" term="%22Roy%2C+Samir Chandra%22">Roy, Samir Chandra</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Fatigue+%26+Fracture+of+Engineering+Materials+%26+Structures%22">Fatigue & Fracture of Engineering Materials & Structures</searchLink>. Mar2026, Vol. 49 Issue 3, p1050-1062. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Dislocation+structure%22">Dislocation structure</searchLink><br /><searchLink fieldCode="DE" term="%22Material+plasticity%22">Material plasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Hysteresis+loop%22">Hysteresis loop</searchLink><br /><searchLink fieldCode="DE" term="%22Chromium+molybdenum+steel%22">Chromium molybdenum steel</searchLink><br /><searchLink fieldCode="DE" term="%22Ratchets%22">Ratchets</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperatures%22">High temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+failures%22">Mechanical failures</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This article highlights the importance of "opening strain," which quantifies the amount and direction of net cyclic plastic deformation, in describing the ratcheting behavior of materials. Ratcheting experiments were conducted on P91 steel at 823 K with varying stress amplitude (290–380 MPa) and mean stress (0–120 MPa). Analysis revealed that ratcheting occurs due to unequal cyclic tensile and compressive plastic strains, leading to non‐closure of hysteresis loops, quantified as "opening strain." The ratcheting behavior of P91 steel exhibited an initial quasi‐stable phase followed by an acceleration phase before failure. Transmission electron microscopic investigation of interrupted test specimens highlighted that dislocation tangles, forests, and networks were associated with minimal strain accumulation in the stable phase. Further investigation of the failed specimens confirmed that the formation of incipient dislocation cells and recrystallized subgrains provided strain‐free paths for dislocation motion and significant strain accumulation in the acceleration phase. Summary: Ratcheting occurs due to unequal cyclic tensile and compressive plastic strains."Opening strain" quantifies the amount and direction of net plastic deformation.In P91 steel, strain in the stable phase is limited by dislocation tangles and networks.High strain accumulates in the acceleration phase due to dislocation cells and subgrains. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Fatigue & Fracture of Engineering Materials & Structures is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/ffe.70172 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1050 Subjects: – SubjectFull: Strains & stresses (Mechanics) Type: general – SubjectFull: Dislocation structure Type: general – SubjectFull: Material plasticity Type: general – SubjectFull: Hysteresis loop Type: general – SubjectFull: Chromium molybdenum steel Type: general – SubjectFull: Ratchets Type: general – SubjectFull: High temperatures Type: general – SubjectFull: Mechanical failures Type: general Titles: – TitleFull: Some Insights Into the Ratcheting Behavior of P91 Steel at Elevated Temperature. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Dhiman, Rajat – PersonEntity: Name: NameFull: Roy, Samir Chandra IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 8756758X Numbering: – Type: volume Value: 49 – Type: issue Value: 3 Titles: – TitleFull: Fatigue & Fracture of Engineering Materials & Structures Type: main |
| ResultId | 1 |
