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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Nanostructured surface layer on metallic materials induced by surface mechanical attrition treatment
TL;DR: In this article, a surface mechanical attrition treatment (SMAT) was developed for synthesizing a nanostructured surface layer on metallic materials in order to upgrade the overall properties and performance.
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Formation of nanostructured surface layer on AISI 304 stainless steel by means of surface mechanical attrition treatment
TL;DR: In this paper, a nanostructured surface layer was formed on an AISI 304 stainless steel with low stacking-fault energy by means of the surface mechanical attrition treatment (SMAT).
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Plastic strain-induced grain refinement at the nanometer scale in copper
TL;DR: In this article, two different mechanisms for plastic strain-induced grain refinement in pure Cu were identified, corresponding to different levels of strain rate, and the minimum size of refined grains via this process is about 100 nm.
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Fatigue life improvement through surface nanostructuring of stainless steel by means of surface mechanical attrition treatment
TL;DR: In this paper, the effect of a nanocrystalline surface layer on the fatigue behavior of a 316L stainless steel is investigated, and significant enhancements of the yield stress and the fatigue limit have been achieved through surface mechanical attrition treatment (SMAT).
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Nanostructure formation mechanism of α-titanium using SMAT
TL;DR: In this paper, a nanostructured surface layer up to 50 μm thick was produced on commercially pure titanium using surface mechanical attrition treatment (SMAT), and the microstructural features of the surface layer produced by SMAT were systematically characterized by cross-sectional optical microscopy observations, transmission electron microscopy (TEM) and high-resolution transmission electron microscope (HRTEM) investigations.
References
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Microstructural evolution and hardening parameters
TL;DR: In this paper, the evolution of dislocation structures in polycrystals with increasing strain is described within a framework of grain subdivision by dislocation boundaries and high angle boundaries and the evolving microstructures are characterized with emphasis on morphology and the changes in the misorientation angle across and spacing between deformation induced boundaries.
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Grain refinement mechanism during equal-channel angular pressing of a low-carbon steel
TL;DR: In this paper, the grain refinement mechanism during equal-channel angular pressing of a plain low-carbon steel was explored by a careful analysis of the slip systems operating at each pass of repetitive pressing.
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Observations of Grain Boundary Structure in Submicrometer-Grained Cu and Ni Using High-Resolution Electron Microscopy
TL;DR: Submicrometer-grained (SMG) structures were produced in Cu and Ni using an intense plastic straining technique, and the grain boundaries and their vicinities were observed by high-resolution electron microscopy as mentioned in this paper.
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Effect of rate sensitivity on slip system activity and lattice rotation
TL;DR: In this article, rate sensitivity and strain rate effects on crystallographic shears and lattice rotations are investigated; it is shown that large strain-rate sensitivities such as those observed at very high strain rates and at high temperatures may increase the total number of significantly active slip systems and decrease the amount of plastic spin.