Grain Boundary Complexion Transitions

Cantwell, Patrick R.; Frolov, Timofey; Rupert, Timothy J.; Krause, Amanda R.; Marvel, Christopher J.; Rohrer, Gregory S.; Rickman, J. M.; Harmer, Martin P.

doi:10.1146/annurev-matsci-081619-114055

Cited by 128 publications

(83 citation statements)

References 133 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the surface, highest amounts of available Ag allow for a planar 5 (210) GB containing close to a monolayer of Ag. Similar GB phase diagrams have been established for different transitions like GB premelting, intergranular film formation or for multilayer segregation patterns as a function of concentration [16]. However, only few such GB phase diagrams could be established, yet.…”

mentioning

confidence: 66%

See 1 more Smart Citation

Segregation-Induced Nanofaceting Transition at an Asymmetric Tilt Grain Boundary in Copper

Peter¹,

Frolov²,

Duarte³

et al. 2018

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

We show that chemistry can be used to trigger a nanofaceting transition. In particular, the segregation of Ag to an asymmetric tilt grain boundary in Cu is investigated. Aberration-corrected electron microscopy reveals that annealing the bicrystal results in the formation of nanometer-sized facets composed of preferentially Ag-segregated symmetric Σ5f210g segments and Ag-depleted f230g=f100g asymmetric segments. Our observations oppose an anticipated trend to form coarse facets. Atomistic simulations confirm the nanofacet formation observed in the experiment and demonstrate a concurrent grain boundary phase transition induced by the anisotropic segregation of Ag.

show abstract

mentioning

confidence: 66%

“…Very recently, a complex co-segregation pattern including segregation induced symmetry changes and order losses at a planar WC grain boundary was discovered [15]. A comprehensive review on evidence of grain boundary transitions can be found in a recent review article [16].…”

mentioning

confidence: 99%

Segregation-Induced Nanofaceting Transition at an Asymmetric Tilt Grain Boundary in Copper

Peter¹,

Frolov²,

Duarte³

et al. 2018

Phys. Rev. Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

“…For a detailed discussion on the underlying thermodynamic equations that quantitatively describe phenomena such as segregation or Gibbs adsorption at defects, we refer to Refs. [36,50,104].…”

Section: Defect Phase Diagrams: Fundamental Concepts Construction and Applicationmentioning

confidence: 99%

Defect phases – thermodynamics and impact on material properties

Korte‐Kerzel

Hickel

Huber

et al. 2021

International Materials Reviews

View full text Add to dashboard Cite

Two approaches in materials physics have proven immensely successful in alloy design: First, thermodynamic and kinetic descriptions for tailoring and processing alloys to achieve a desired microstructure. Second, crystal defect manipulation to control strength, formability and corrosion resistance. However, to date, the two concepts remain essentially decoupled. A bridge is needed between these powerful approaches to achieve a single conceptual framework. Considering defects and their thermodynamic state holistically as 'defect phases', provides a future materials design strategy by jointly treating the thermodynamic stability of both, the local crystalline structure and the distribution of elements at defects. Here, we suggest that these concepts are naturally linked by defect phase diagrams describing the coexistence and transitions of defect phases. Construction of these defect phase diagrams will require new quantitative descriptors. We believe such a framework will enable a paradigm shift in the description and design of future engineering materials.

show abstract

“…Thus, the nature of the grain boundary, i.e., the microstructure and properties, must be understood, and controlled through emerging grain boundary engineering strategies such as ''grain boundary segregation engineering,'' ''complexions,'' or interstitial boundary effects. [140,159,208] In particular, the high-volume fraction of grain boundaries in severe plastic deformation-processed materials may provide experimental data for the high-angle grain boundary energies needed for this particular model. 4.…”

Section: The Chandross and Argibay Model Tells Us Thatmentioning

confidence: 99%

Building on Gleiter: The Foundations and Future of Deformation Processing of Nanocrystalline Metals

Mathaudhu

2020

Metall Mater Trans A

View full text Add to dashboard Cite

In 1989, fueled by his prior reports and findings, Prof. Herbert Gleiter published a seminal work on the synthesis, processing, and possibilities for nanocrystalline materials. This spark exploded into the field of bulk nanocrystalline metals by severe plastic deformation processing, with the primary driver being attaining the ultimate strength of a metal through refinement of the grain sizes to a level approaching the theoretically possible limits. This paper will briefly explore the historical development of SPD and based on Turnbull's strategy of ''energizing and quenching'' materials to attain a desirable metastable state, present thoughts on incipient-related areas of exploration, including thermal stabilization through solute additions, the role of trace impurities and interstitials, the smallest grain size achievable (both theoretically and practically), and the captivating yet hazy character and role of the grain boundary. Lastly, some new approaches to making and then controlling the behavior of nanocrystalline materials will be presented. At each stage, opportunities for future study will be raised. On the 50th Anniversary of Metallurgical and Materials Transactions A, it is hoped that this report will build off the seed planted by Gleiter and inspire new work and collaborations in the years to come.

show abstract

Grain Boundary Complexion Transitions

Cited by 128 publications

References 133 publications

Segregation-Induced Nanofaceting Transition at an Asymmetric Tilt Grain Boundary in Copper

Segregation-Induced Nanofaceting Transition at an Asymmetric Tilt Grain Boundary in Copper

Defect phases – thermodynamics and impact on material properties

Building on Gleiter: The Foundations and Future of Deformation Processing of Nanocrystalline Metals

Contact Info

Product

Resources

About