Evolution of Intragranular Misorientation during Plastic Deformation

Mino, Kazuaki; Fukuoka, C.; Yoshizawa, Hiroki

doi:10.2320/jinstmet1952.64.1_50

“…2 4) and the local average misorientation corresponds to the latter. 5) In the sample before bending which contains no plastic strain, the local average misorientation was about 0.4 degrees par 0.1 µm step. This misorientation was regarded as a measurement deviation when the Kikuchi pattern was read.…”

Section: Methodsmentioning

confidence: 97%

Influence of Crystal Orientations on the Bendability of an Al-Mg-Si Alloy

Takeda

¹

,

Hibino

²

,

Takata

³

2010

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The influence of texture on the bendability in CuNiSi alloys was examined by using an age-hardened polycrystalline strip with various recrystallization textures. In multiple samples manufactured by adjusting conditions of rolling and heat treatment, the Cube orientation f100gh001i, the RD-rotated Cube orientation f012gh100i, the BR orientation f362gh853i and the R(S) orientation f231gh346i, which are the representative recrystallization textures of FCC metals, developed up to 40% in respective area fractions. The bendability was clearly dependent on texture. The sample that had a strongly developed Cube orientation showed the best bendability with respect to both the good and bad ways (GW, BW) in bending. In comparison, the samples in which the BR and the R orientations developed showed poor GW bendability. The sample having a comparably random orientation showed poor GW and BW bendability. The shape of the cracks generated by bending was linear, and these cracks developed in a direction about 40 degrees from the surface. Further, they developed along shear bands, and this result was confirmed by the EBSD measurement. Therefore, the cause of cracking resulting from bending was shear bands. The correlation between the good bendability and a low average Taylor factor was confirmed. More uniform deformation by crystalline slips through texture control was effective for restraining the shear bands, i.e., for obtaining excellent bendability. [

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“…However, the introduction of plastic strain can also result in sub-structure formation associated with the re-arrangement of dislocations. Free dislocations generated during plastic deformation can readily re-arrange themselves, leading to the development of Low-Angle Grain Boundaries (LAGB) [1,8,9]. Plastic deformation results in an increase of the dislocation density which also affects local surface work function and hence the electrochemical potential [10].…”

Section: Introductionmentioning

confidence: 99%

SKPFM measured Volta potential correlated with strain localisation in microstructure to understand corrosion susceptibility of cold-rolled grade 2205 duplex stainless steel

Örnek

¹

,

Engelberg

²

2015

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Highlights: Microstructure information from EBSD analysis has been correlated with SKPFM maps  SKPFM assessment in 38% and 88% relative humidity was carried out  Ferrite and austenite have a Volta potential difference of 70-90 mV  Cold deformation reduced Volta potential differences between ferrite and austenite  Cold deformation produced higher susceptibility at confined microstructure regions AbstractScanning Kelvin Probe Force Microscopy (SKPFM) of annealed and cold-rolled grade 2205 duplex stainless steel has been correlated with microstructure analysis using Electron BackScattered Diffraction (EBSD). In annealed microstructure Volta potential differences indicated micro-galvanic coupling between ferrite and austenite reasoning selective dissolution of ferrite. The introduction of cold work reduced the difference between both phases, but the development of local extremes in Volta potential was observed. Microstructure analysis revealed the presence of larger misorientation concentrations at these sites, which can explain the changes in observed corrosion behaviour, from selective dissolution in the annealed condition to localised corrosion attack after cold-rolling.

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“…2 4) and the local average misorientation corresponds to the latter. 5) In the sample before bending which contains no plastic strain, the local average misorientation was about 0.4 degrees par 0.1 µm step. This misorientation was regarded as a measurement deviation when the Kikuchi pattern was read.…”

Section: Methodsmentioning

confidence: 99%

Influence of Texture on Bendability of Cu–Ni–Si Alloys

Kaneko

¹

2012

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The influence of texture on the bendability in CuNiSi alloys was examined by using an age-hardened polycrystalline strip with various recrystallization textures. In multiple samples manufactured by adjusting conditions of rolling and heat treatment, the Cube orientation f100gh001i, the RD-rotated Cube orientation f012gh100i, the BR orientation f362gh853i and the R(S) orientation f231gh346i, which are the representative recrystallization textures of FCC metals, developed up to 40% in respective area fractions. The bendability was clearly dependent on texture. The sample that had a strongly developed Cube orientation showed the best bendability with respect to both the good and bad ways (GW, BW) in bending. In comparison, the samples in which the BR and the R orientations developed showed poor GW bendability. The sample having a comparably random orientation showed poor GW and BW bendability. The shape of the cracks generated by bending was linear, and these cracks developed in a direction about 40 degrees from the surface. Further, they developed along shear bands, and this result was confirmed by the EBSD measurement. Therefore, the cause of cracking resulting from bending was shear bands. The correlation between the good bendability and a low average Taylor factor was confirmed. More uniform deformation by crystalline slips through texture control was effective for restraining the shear bands, i.e., for obtaining excellent bendability.

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Evolution of Intragranular Misorientation during Plastic Deformation

Cited by 22 publications

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Influence of Crystal Orientations on the Bendability of an Al-Mg-Si Alloy

Influence of Crystal Orientations on the Bendability of an Al-Mg-Si Alloy

SKPFM measured Volta potential correlated with strain localisation in microstructure to understand corrosion susceptibility of cold-rolled grade 2205 duplex stainless steel

Influence of Texture on Bendability of Cu–Ni–Si Alloys

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Evolution of Intragranular Misorientation during Plastic Deformation

Cited by 22 publications

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Influence of Crystal Orientations on the Bendability of an Al-Mg-Si Alloy

Influence of Crystal Orientations on the Bendability of an Al-Mg-Si Alloy

SKPFM measured Volta potential correlated with strain localisation in microstructure to understand corrosion susceptibility of cold-rolled grade 2205 duplex stainless steel

Influence of Texture on Bendability of Cu&ndash;Ni&ndash;Si Alloys

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Influence of Texture on Bendability of Cu–Ni–Si Alloys