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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Investigation of Microstructure and Properties of Surface Nanocrystallization Layer by Rolling Technology
TL;DR: In this paper, a nanocrystalline surface layer was fabricated on the deposited layer by using pre-forceing rolling technology (PFRT), which can form a smooth surface on the parts, so it can be used as the last process of the machining.
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Effect of surface nanostructuring in solution treated and thermally aged condition on LCF life of AA7075
Vaibhav Pandey,Manish Kumar Singh,Joysurya Basu,Kamanio Chattopadhyay,N.C. Santhi Srinivas,Vakil Singh +5 more
TL;DR: In this paper, the AA7075 was studied in the solution treated-ultrasonic shot peened and the peak aged (ST-USSP-PA) condition and was compared with that of peak aged and ultrasonic shot-peened (USSP) as well as the peak-aged and stress relieved (SR) condition, studied earlier.
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Investigation of Grain Boundary Content on Crack Propagation Behavior of Nanocrystalline Al by Molecular Dynamics Simulation
TL;DR: In this article , four molecular dynamics models of nanocrystalline aluminum with different grain boundaries (GBs) contents are established, and the results show that the presence of GBs in polycrystals can increase the toughness and absorb energy, reducing the risk of brittle crack propagation.
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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