منابع مشابه
plastic instability in equibiaxial deformation of sheet metals
plastic instability which results in the localization and failure of sheet metals has been studied in equibiaxial stretching of commercial purity aluminium sheet. attention was focussed on two main industrial conditions of the material. these were representative of the materials that could be processed by the commercial batchannealing process (slow heating, long time) or by a continuous anneali...
متن کاملOn Serrated Plastic Flow in an AA5052-H32 Sheet
Temporal and spatial characteristics of serrated plastic flow or the so-called Portevin-Le Chatelier (PLC) deformation bands in a commercial Al-2.5%Mg sheet metal due to dynamic strain aging effects were investigated experimentally under quasi-static uniaxial tension. It was found that the thickness and width of test coupons, applied loading conditions (machine stiffness and crosshead speed), a...
متن کاملTexture Correlation Representation Methods: Application to 6022 Aluminum Sheet
Two new graphical methods are presented for microstructural analysis of crystalline material. These analyses are intended to aid an understanding of deformation behavior at scales larger than the grain size. The correlation of orientation over large distances has rarely been investigated since long-range correlation has been assumed to be negligible, if present at all. The first method reveals ...
متن کاملOn the r-value of weakly-textured sheet metals
The r-value of a sheet metal is a measure of plastic anisotropy frequently used for prediction of performance in deep-drawing. It has also gured prominently in the literature for validation of theories where the predicted angular dependence of r is compared with the measured dependence. As plastic anisotropy in sheet metals is caused mainly by the preferred orientations of grains within the pol...
متن کاملNucleation of deformation twins in nanocrystalline face-centered-cubic metals processed by severe plastic deformation
Nanocrystalline nc materials are known to deform via mechanisms not accessible to their coarse-grained counterparts. For example, deformation twins and partial dislocations emitted from grain boundaries have been observed in nc Al and Cu synthesized by severe plastic deformation SPD . This paper further develops an earlier dislocation-based model on the nucleation of deformation twins in nc fac...
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ژورنال
عنوان ژورنال: Journal of the Japan Institute of Metals and Materials
سال: 1963
ISSN: 0021-4876,1880-6880
DOI: 10.2320/jinstmet1952.27.2_68