On the origin of the extremely high strength of ultrafine-grained Al alloys produced by severe plastic deformation
By R. Valiev, N. Enikeev, M. Murashkin, V. Kazykhanov, X. Sauvage. 2010
298 citations recorded by the source corpus.
Ultrafine-grained Al alloys produced by high-pressure torsion are found to exhibit a very high strength, considerably exceeding the Hall–Petch predictions for ultrafine grains. This phenomenon can be attributed to the unique combination of ultrafine structure and deformation-induced segregations of solute elements along grain boundaries, which may affect the emission and mobility of intragranular dislocations.
Subfields: Materials Chemistry, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/d4cfde2ba9bf3dfa9afd3b74bf53c5963ec6374b
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In Materials Chemistry
- Terence G. Langdon
- Yuntian Zhu
- R. Valiev
- Z. Horita
- I. Ovid’ko
- Yuri Estrin
- Michael Zehetbauer
- R. Pippan
In Mechanics of Materials
- Terence G. Langdon
- Yuntian Zhu
- Z. Horita
- R. Valiev
- Yuri Estrin
- I. Ovid’ko
- R. Pippan
- Michael Zehetbauer
Citations in the corpus
- Mechanical properties, microstructure and thermal stability of a nanocrystalline CoCrFeMnNi high-entropy alloy after severe plastic deformation (2015, background): “Such a grain boundary segregation based strengthening mechanism has been proposed before to explain the origin of the unusually high strength in SPD-processed Al alloys [47] and austenitic steels [48].”
- Thermodynamic instability of a nanocrystalline, single-phase TiZrNbHfTa alloy and its impact on the mechanical properties (2018, background): “Annealing might cause an elevated concentration of solutes at the grain boundaries, which subsequently could suppress the emission of dislocations due to solute drag [44].”
- Review on superior strength and enhanced ductility of metallic nanomaterials (2018, background): “Furthermore, concentration of alloying elements at GBs can be one order of magnitude larger than in grain interior [317,319,321].”
- Fundamentals of Superior Properties in Bulk NanoSPD Materials (2016, methodology): “boundary segregations in the UFG alloys by SPD may suppress the generation of dislocations at grain boundaries and lead to considerable additional hardening.[23]”