Advances in Recrystallization of Metallic Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Structural Integrity of Metals".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 3135

Special Issue Editor

Division of Solid Mechanics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden
Interests: computational material mechanics; recrystallization; grain growth; phase transformations; texture evolution
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recrystallization (RX) is a key driver behind microstructure evolution in crystalline materials. The phenomenon is commonly observed in a range of different materials, comprising geo-materials, like rocks and ice, as well as engineering materials such as metals and alloys. The latter category of materials is the focus of this Special Issue of Metals.

In general terms, RX can be defined as the formation of a new grain structure in a cold-worked material and occurs through the formation and migration of mobile grain boundaries. A distinction is frequently made between RX that progresses by distinct stages of nucleation and growth (discontinuous RX, DRX) or that occurring by a continuous grain structure evolution (continuous RX, CDRX). Such differences are closely linked to the specific material and processing conditions under consideration.

On a macroscopic scale, RX can take place during materials processing under static conditions (static RX, SRX), or under dynamic conditions (dynamic RX, DRX) in conjunction with concurrent deformation of the material. Important processing parameters include the temperature, deformation and deformation rate. On the micro-/mesoscopic scale, RX is intimately linked to the properties of grain boundaries, crystallographic texture, grain morphologies, evolution of dislocation structures and a range of other processes and features of the crystal aggregate. At even finer length scales, detailed aspects of, for example, grain boundary structure, grain boundary energy/mobility and dislocation mechanics become relevant. Observations such as these highlight the inherent multiscale nature of RX, which is a challenge in both experimental investigations and in the numerical modelling of RX and related phenomena.

Recognizing the multitude of highly relevant research topics that are linked to RX, the present Special Issue of Metals welcomes, but is not limited to, studies on:

  • Thermo-mechanical materials processing during which RX is a central aspect
  • The exploitation of RX in materials design
  • Observation and characterization of the processing-microstructure-property links and their dependence on RX
  • Nucleation mechanisms in RX
  • Influence of grain boundary structure on RX
  • Grain boundary properties and their relation to RX
  • Texture influence and evolution in RX
  • Numerical models of RX
  • Multiscale approaches in modelling and simulation of RX

The adopted methods can be based either on experimental characterization and observation or on numerical modelling. In particular, submissions that combine experimental observations with numerical simulations are encouraged. In addition, studies that aim to develop suitable experimental methods or to establish new numerical methods for describing and characterizing RX are welcome.

Dr. Håkan Hallberg
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Recrystallization
  • Grain boundaries
  • Nucleation
  • Texture
  • Metals and alloys
  • Experiment
  • Modeling
  • Simulation

Published Papers (1 paper)

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Research

30 pages, 11242 KiB  
Article
Dissolution of the Primary γ′ Precipitates and Grain Growth during Solution Treatment of Three Nickel Base Superalloys
by Karen Alvarado, Ilusca Janeiro, Sebastian Florez, Baptiste Flipon, Jean-Michel Franchet, Didier Locq, Christian Dumont, Nathalie Bozzolo and Marc Bernacki
Metals 2021, 11(12), 1921; https://doi.org/10.3390/met11121921 - 28 Nov 2021
Cited by 14 | Viewed by 2559
Abstract
Second phase particles (SPP) play an essential role in controlling grain size and properties of polycrystalline nickel base superalloys. The understanding of the behavior of these precipitates is of prime importance in predicting microstructure evolutions. The dissolution kinetics of the primary γ [...] Read more.
Second phase particles (SPP) play an essential role in controlling grain size and properties of polycrystalline nickel base superalloys. The understanding of the behavior of these precipitates is of prime importance in predicting microstructure evolutions. The dissolution kinetics of the primary γ precipitates during subsolvus solution treatments were investigated for three nickel base superalloys (René 65, AD730 and N19). A temperature-time codependency equation was established to describe the evolution of primary γ precipitates of each material using experimental data, the Thermo-Calc software and the Johnson–Mehl–Avrami–Kolmogorov (JMAK) model. The dissolution kinetics of precipitates was also simulated using the level-set (LS) method and the former phenomenological model. The precipitates are represented using an additional LS function and a numerical treatment around grain boundaries in the vicinity of the precipitates is applied to reproduce their pinning pressure correctly. Thus, considering the actual precipitate dissolution, these simulations aim to predict grain size evolution in the transient and stable states. Furthermore, it is illustrated how a population of Prior Particle Boundaries (PPB) particles can be considered in the numerical framework in order to reproduce the grain size evolution in the powder metallurgy N19 superalloy. The proposed full-field strategy is validated and the obtained results are in good agreement with experimental data regarding the precipitates and grain size. Full article
(This article belongs to the Special Issue Advances in Recrystallization of Metallic Materials)
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