Investigation on Grain Size Effect of Rolling Texture in Copper

Cold rolling (CR) was conducted on coarse grained (CG) and ultrafine-grained (UFG) coppers, obtained by 1 and 8 passes in the equal channel angel pressing (ECAP), to investigate the effect of grain size on rolling texture. The microstructure was refined to UFG (~420 nm) with the ECAP pass increased to 8, while only band-like CG microstructure was observed in the 1 pass processed copper. The influence of the texture before CR could be excluded as the crystallographic texture kept similar for different ECAP pass. Pole figures (PFs) showed that the shear texture introduced by ECAP was replaced by rolling texture after CR. Furthermore, the rolling texture was a kind of classical copper-type for the CG copper, while a brass-type rolling texture was observed in the UFG copper. TEM results confirmed that the deformation nanotwins were only observed in the UFG copper, while the microstructure of CG copper was further compressed and subdivided. It indicated that the observed differences in rolling texture component and density might be contributed to the grain size effect which resulted in different deformation mechanism and grain subdivision behavior.

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Crack Blunting through Lattice Dislocation Slip in Nanocrystalline and Ultrafine-Grained Materials

Materials Science Forum ◽

10.4028/www.scientific.net/msf.633-634.55 ◽

2009 ◽

Vol 633-634 ◽

pp. 55-62

Author(s):

Ilya A. Ovidko ◽

A.G. Sheinerman

Keyword(s):

Grain Size ◽

Size Effect ◽

Stress Fields ◽

Dislocation Slip ◽

Cubic Phase ◽

Grain Size Effect ◽

Dislocation Emission ◽

Ultrafine Grained ◽

Ultrafine Grained Materials ◽

Crack Blunting

The grain size effect on blunting of cracks in nanocrystalline and ultrafine-grained materials (UFG) is theoretically described. Within our description, lattice dislocations emitted from cracks are stopped at grain boundaries. The stress fields of these dislocations suppress further dislocation emission from cracks in nanocrystalline and UFG materials, and the suppression depends on grain size. The dependences of the number of dislocations emitted by a crack on grain size (ranging from 10 to 300 nm) in Cu and 3C-SiC (the cubic phase of silicon carbide) are calculated which characterize the grain size effect on crack blunting that crucially influences ductility of these materials.

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Grain size effect on deformation twinning propensity in ultrafine-grained hexagonal close-packed titanium

Scripta Materialia ◽

10.1016/j.scriptamat.2013.06.001 ◽

2013 ◽

Vol 69 (5) ◽

pp. 428-431 ◽

Cited By ~ 41

Author(s):

J.L. Sun ◽

P.W. Trimby ◽

F.K. Yan ◽

X.Z. Liao ◽

N.R. Tao ◽

...

Keyword(s):

Grain Size ◽

Size Effect ◽

Deformation Twinning ◽

Grain Size Effect ◽

Hexagonal Close Packed ◽

Ultrafine Grained

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Evaluation of the Effect of Initial Texture on the Development of Deformation Texture

Textures and Microstructures ◽

10.1155/tsm.6.231 ◽

1986 ◽

Vol 6 (4) ◽

pp. 231-263 ◽

Cited By ~ 13

Author(s):

T. Leffers ◽

D. Juul Jensen

Keyword(s):

Grain Size ◽

Size Effect ◽

Deformation Texture ◽

Coarse Grained ◽

Grain Size Effect ◽

Fine Grained ◽

Random Texture ◽

Starting Conditions ◽

Initial Texture ◽

Computer Procedure

We describe a computer procedure which allows us to introduce experimental initial textures as starting conditions for texture simulation (instead of a theoretical random texture). We apply the procedure on two batches of copper with weak initial textures and on fine-grained and coarse-grained aluminium with moderately strong initial textures. In copper the initial texture turns out to be too weak to have any significant effect. In aluminium the initial texture has a very significant effect on the simulated textures—similar to the effect it has on the experimental textures. However, there are differences between the simulated and the experimental aluminium textures that can only be explained as a grain-size effect. Possible future applications of the procedure are discussed.

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Grain Size Effect on the Mechanical Behavior of Metastable Fe-23Cr-8.5Ni Alloy

Metals ◽

10.3390/met9070734 ◽

2019 ◽

Vol 9 (7) ◽

pp. 734 ◽

Cited By ~ 3

Author(s):

Lin Xie ◽

Chunpeng Wang ◽

Yuhui Wang ◽

Guilin Wu ◽

Xiaoxu Huang

Keyword(s):

Grain Size ◽

Yield Strength ◽

Size Effect ◽

Mechanical Behavior ◽

Tensile Elongation ◽

Model Material ◽

Coarse Grained ◽

High Yield ◽

Grain Size Effect ◽

Structural Refinement

An Fe-23Cr-8.5Ni alloy was used as a model material to study the grain size effect on the mechanical behavior of metastable duplex metal. Alloy samples with different grain sizes ranging from 0.1 to 2 μm were prepared by cold-rolling and annealing. A structural refinement to about 0.1 μm results in a high yield strength but very limited ductility. A significant improvement of ductility occurred at the grain size of about 0.4 μm. A further increase in grain size results in a decreased strength and a slightly improved ductility. The alloy with a grain size of about 0.4 μm exhibits an excellent combination of strength and ductility, where the yield strength and tensile elongation are increased up to 738 MPa and 29% as compared to 320 MPa and 33% of a coarse-grained (about 2 μm) sample, respectively. The origin of the excellent mechanical properties was attributed to the unique deformation characteristics associated with the transformation induced plasticity and the development of back stress.

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