ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

The effect of crystallographic orientation and interfaces on thermo-mechanical softening of a martensitic steel

Aashranth, B and Shankar, G and Davinci, MA and Samantaray, D and Borah, U and Suwas, S (2021) The effect of crystallographic orientation and interfaces on thermo-mechanical softening of a martensitic steel. In: Journal of Materials Research .

Full text not available from this repository. (Request a copy)
Official URL: https://doi.org/10.1557/s43578-021-00141-5


Thermo-mechanical softening forms the basis for hot working of metallic materials. In materials with hierarchical microstructures such as martensite, softening processes can be mediated or restricted by interfaces. In the present study, the operation of three distinct softening mechanisms in P91 martensitic steel during thermo-mechanical processing (TMP) has been investigated. The softening in the present case is found to arise from the interplay between microstructural strain, texture, and phase transformation. Further, softening characteristics vary with the TMP parameters. The manifestation of softening has been explored at the macroscopic, mesoscopic, and microscopic length scales. It has been found that each softening mechanism is differently mediated by the interfaces and is governed by local crystallographic orientation. Thermo-mechanical softening of martensite proceeds through orientation-dependent dynamic recrystallization. The role of specific interfaces in impeding this mechanism has been highlighted. In contrast, TMP of austenite proceeds through interface-mediated softening, combining the phenomena of recrystallization and phase transformation. Graphic Abstract: Figure not available: see fulltext. © 2021, The Author(s), under exclusive licence to The Materials Research Society.

Item Type: Journal Article
Publication: Journal of Materials Research
Publisher: Springer Nature
Additional Information: The copyright for this article belongs to Springer Nature
Keywords: Dynamic recrystallization; Hot working; Martensite; Martensitic transformations; Mechanisms; Textures, Crystallographic orientations; Hierarchical microstructures; Microscopic length scale; Microstructural strains; Orientation dependent; Softening mechanisms; Specific interface; Thermo-mechanical processing, Martensitic stainless steel
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 19 Apr 2021 10:24
Last Modified: 19 Apr 2021 10:24
URI: http://eprints.iisc.ac.in/id/eprint/68655

Actions (login required)

View Item View Item