scholarly journals Errata: Texture evolution in AZ80 magnesium alloy by the plane strain compression deformation at high temperature[J. Jpn. Inst. Light Met. 62(2): 54-59 (2012)]

2012 ◽  
Vol 62 (5) ◽  
pp. 230
Author(s):  
Jinuk Kim ◽  
Kazuto Okayasu ◽  
Hiroshi Fukutomi
Keyword(s):  
High Temperature ◽  
Magnesium Alloy ◽  
Plane Strain ◽  
Texture Evolution ◽  
Plane Strain Compression ◽  
Compression Deformation ◽  
Az80 Magnesium Alloy

Texture Formation Behaviors in AZ80 Magnesium Alloy during High-Temperature Plane Strain Compression

2015 ◽  
Vol 1110 ◽  
pp. 152-157
Author(s):  
Kwon Hoo Kim ◽  
Jun Ho Choi ◽  
Kwang Il Hwang ◽  
Han Sang Kwon ◽  
Kazuto Okayasu ◽  
...  
Keyword(s):  
High Temperature ◽  
Magnesium Alloy ◽  
Plane Strain ◽  
Plane Strain Compression ◽  
Temperature Deformation ◽  
Deformation Condition ◽  
Pole Density ◽  
Texture Formation ◽  
Az80 Magnesium Alloy ◽  
Initial Texture

The behavior of texture formation during high-temperature deformation in AZ80 magnesium alloy is investigated. Three kinds of specimens were machined out from rolled plates. The plane strain compression tests were conducted at various deformation conditions – temperature, strain and strain rate. After compression deformation, texture measurement was carried out on the mid-plane section parallel to the compression direction by the Schulz reflection method and EBSD measurement. The maximum values of the flow stress are observed in all the cases at the true stress – true strain curve for three type of specimens. It is found that the main component of texture and the accumulation of pole density vary depending on deformation condition and initial texture. Six kinds of crystal orientation components have been observed after deformation in total. (0001)<10-10> is formed regardless of the initial texture.

Texture Formation Behaviour during High-Temperature Plane Strain Compression Deformation in AZ91 Magnesium Alloy

2018 ◽  
Vol 941 ◽  
pp. 1198-1202
Author(s):  
Dong Keun Han ◽  
Min Soo Park ◽  
Han Sang Kwon ◽  
Kwon Hoo Kim
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Plane Strain ◽  
Texture Evolution ◽  
Plane Strain Compression ◽  
Deformation Condition ◽  
Rolled Plate ◽  
Pole Density ◽  
Texture Formation ◽  
Compression Tests

In previous study, it was investigated texture formation behaviour of high-temperature plane strain compression test at 723K, under a strain rate of 5.0. It was found that the main texture component and it was sharpness vary depending on deformation conditions. To clarify the characteristic of texture formation behaviour, it is necessary to investigate at various deformation condition. Therefore, in this study, is investigating the influence or texture formation behaviour and strain, strain rate at 673K. Three kinds of specimens with different initial textures were machined out from a rolled plate having a <0001> texture. The plane strain compression tests were conducted at a temperature 673K, and a strain rate of 5.0, with strain between-0.4 to-1.0. After compression tests, the specimens were immediately quenched in oil. The texture evolution was conducted by the Schulz reflection method using Cu Kα radiation and EBSD. Before the deformation, {0001} of specimen A was accumulated in the center of pole figure. The {0001} of specimen B was accumulated at the RD direction. The {0001} of specimen C was accumulated TD direction. As a result, work softening is observed in all the cases at the true stress – true strain curve for three types of specimens. After deformation, the maximum pole density of increases with increasing strain. In this study, it was found that the stable orientation was (0001)<100> and (0001)<110> during deformation.

Effect of Large Strain on Texture Formation Behavior of AZ80 Magnesium Alloy during High Temperature Deformation

2016 ◽  
Vol 879 ◽  
pp. 938-942 ◽  
Author(s):  
Kwon Hoo Kim ◽  
Kazuto Okayasu ◽  
Hiroshi Fukutomi
Keyword(s):  
High Temperature ◽  
Magnesium Alloy ◽  
Uniaxial Compression ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Deformation Condition ◽  
Basal Texture ◽  
Compression Deformation ◽  
Az80 Magnesium Alloy ◽  
Formation Behavior

In previous study, the formation behavior of texture and microstructure in AZ80 magnesium alloy under high temperature deformation was investigated. It was found that the basal texture was formed at stress of more than 15-20MPa and the non-basal texture was formed at stress of less than 15-20MPa. This means that stress of 15-20MPa is the change point of deformation mechanism. Therefore, in this study, uniaxial compression deformation of AZ80 magnesium alloy was carried out at high temperature deformation (stress of 15-20MPa). Behaviors of microstructure and texture development are experimentally studied. The material used in this study is a commercial magnesium alloy extruded AZ80. The uniaxial compression deformation is performed at temperature of 723K and strain rate 3.0×10-3s-1, with a strain range of between-0.4 and-1.3. Texture measurement was carried out on the compression planes by the Schulz reflection method using nickel filtered Cu Kα radiation. EBSD measurement was also conducted in order to observe spatial distribution of orientation. As a result of high temperature deformation, the maximum value of the flow stress is observed at the true stress-strain curves, and the main component of texture and the accumulation of pole density vary depending on deformation condition.

Texture Evolution during High Temperature Plane Strain Compression of High Silicon Steels

2007 ◽  
Vol 553 ◽  
pp. 15-20 ◽  
Author(s):  
Pablo Rodriguez-Calvillo ◽  
Yvan Houbaert
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Plane Strain ◽  
Silicon Content ◽  
Texture Evolution ◽  
Plane Strain Compression ◽  
Compression Tests ◽  
Average Grain Size ◽  
High Silicon ◽  
Average Size

High silicon steel is used for electrical applications because its electrical resistivity is increased and the magnetostriction is reduced. A silicon content up to 6.5 wt.-% gives excellent magnetic properties. The improvement of the magnetic properties stays in contrast with the lack of ductility of these alloys, making their thermo-mechanical processing difficult. The optimum final microstructure and texture depends on the final application of the material: extremely big grains with a Goss orientation ({110} <001>) are desired in transformers and grains with an average size of 100 -m and cube component ({100} <001>) are used in electrical motors. A series of plane strain compression (PSC) tests were performed on 3 electrical steels, with a silicon content from 1.8 to 4.1 wt.-%, in a temperature range of 800 to 1100°C, strain rates between of 0.5 and 5 s-1. Reductions and time between deformation and quenching were also varied in order to study the recrystallisation progress. Apparent activation energies for hot working, calculated using the hyperbolic sine equation, was in good agreement with literature and higher than the activation energy for self diffusion in iron. These values increase with the silicon content. The high temperature texture evolution was investigated by means of electron back scattering Diffraction (EBSD) technique, which allows the quantification of important texture components in function of the thermo-mechanical parameters applied during hot rolling and the plane strain compression tests. The hot rolled microstructures have shown an average grain size of 140 -m and a texture with a maximum on the cube fibre ({001} <-1-10>). The conventional α (<110> // RD) / γ (<111> // ND) fibre texture was developed after plane strain compression and their intensities depend on the deformation temperature and reduction. A similar tendency was observed for the fraction of static recrystallised grains.

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