Microstructure and evolution of mechanically-induced ultrafine grain in surface layer of AL-alloy subjected to USSP
TLDR
In this paper, the authors investigated the UFG microstructures in the surface layer of an aluminum alloy 7075 heavily worked by ultrasonic shot peening and found that the grain subdivision into the subgrains was the main mechanism responsible for grain refinement.About:
This article is published in Acta Materialia.The article was published on 2002-05-08 and is currently open access. It has received 418 citations till now. The article focuses on the topics: Dislocation & Surface layer.read more
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Surface nanocrystallisation engineering: scientific and industrial potential
Z. B. Wang,K. Lu +1 more
TL;DR: In this paper, the grain refinement mechanism, mechanical and diffusion properties, and chemical reactivity of the nanostructured surface layer, as well as the effects of the surface layer on the mechanical performance and surface thermochemical treatment processes of engineering materials are described.
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Study on Mechanical Properties of Nanocrystal Surface Layer of an Aluminum Alloy
TL;DR: In this article, the elastic modulus and the hardness of the nanocrystal surface layer of an aluminum alloy induced by high speed shot peening (HSSP) were investigated. And the results of nanoindentation experiment show that the elastic and hardness of nano-indentated aluminum alloy increased,by 8% and 20%, respectively.
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Microstructure evolution and deformation feature of az31 magnesium alloy during severe plastic deformation
TL;DR: In this paper, a nanostructured surface layer was produced on commercially AZ31 magnesium alloy using surface mechanical attrition treatment (SMAT), and the microstructure evolution and deformation feature along the depth of the treated surface layer were characterized by transmission electron microscope (TEM) investigations.
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A method for including diffusive effects in texture evolution
TL;DR: In this article, a model for representing grain misorientation in continuum models for texture evolution is described, which relies on a connection, derived here, between the fluctuation of the reorientation velocity in discrete models of texture evolution and an isotropic diffusion operator that can be used to represent misorientations effects in a continuum model.
References
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The process of grain refinement in equal-channel angular pressing
TL;DR: In this article, experiments were conducted on high purity aluminum to investigate the process of grain refinement during equal-channel angular (ECA) pressing, where samples were subjected to 1 to 4 pressings and then sectioned for microstructural examination in three mutually perpendicular directions.
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Structure and properties of ultrafine-grained materials produced by severe plastic deformation
TL;DR: In this article, the formation of a special grain boundary phase, i.e., a thin near-boundary layer with high dynamic activity of atoms, has been found, leading to the manifestation of promising new elastic, strength, superplastic, damping and magnetic properties of UFG materials.
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Overview no. 96: Evolution of F.C.C. deformation structures in polyslip
TL;DR: In this article, the authors investigated the microstructural evolution during polyslip in f.c.m.d. metals and showed that there are differences in the number and selection of simultaneously acting slip systems among neighboring volume elements of individual grains.
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An investigation of microstructural evolution during equal-channel angular pressing
TL;DR: In this article, the development of an ultra-fine grain size during equal-channel angular (ECA) pressing of high purity aluminum with an initial grain size of ∼1.0 mm was investigated.
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