An in-situ electron backscattering diffraction and viscoplastic self-consistent study of microstructure and texture development in OFHC copper subjected to uniaxial tension

2021 ◽  
pp. 141184
Author(s):  
Rui Wang ◽  
Ahmed A. Saleh ◽  
Gilberto Casillas ◽  
Cheng Lu ◽  
Azdiar A. Gazder
Keyword(s):  
Uniaxial Tension ◽  
Texture Development ◽  
Ofhc Copper ◽  
Electron Backscattering ◽  
Electron Backscattering Diffraction ◽  
Self Consistent

Twinning and Detwinning Mechanisms in Beta-Ti Alloys

2018 ◽  
Vol 941 ◽  
pp. 821-826
Author(s):  
Ivan Gutierrez-Urrutia ◽  
Cheng Lin Li ◽  
Xin Ji ◽  
Satoshi Emura ◽  
Koichi Tsuchiya
Keyword(s):  
Free Energy ◽  
Statistical Analysis ◽  
Grain Boundaries ◽  
Twin Structure ◽  
Electron Backscattering ◽  
Macroscopic Stress ◽  
Independent Events ◽  
Ti Alloys ◽  
Electron Backscattering Diffraction

We have investigated {332}<113> twinning and detwinning mechanisms in β-Ti alloys. Microstructure-twinning relations were evaluated in a β-Ti-15Mo (wt.%) alloy by statistical analysis of the evolving twin structure upon deformation by in-situ SEM testing and electron backscattering diffraction (EBSD). We find that most of the primary twins (~80%) correspond to the higher stressed variant and follow Schmid’s law with respect to the macroscopic stress. Detwinning mechanism was evaluated in a multilayered β-Ti-10Mo-xFe (x: 1-3 wt.%) by EBSD. We find that the detwinning process consists of two independent events that occur at two different microstructural regions, i.e. twin tips located at grain interiors and grain boundaries. Both detwinning modes can be explained from a thermodynamic standpoint where the boundary dissociation processes minimize the boundary free energy.

Measuring Strains for Hematite Phase in Sinter Ore by Electron Backscattering Diffraction Method

2006 ◽  
Vol 326-328 ◽  
pp. 237-240 ◽  
Author(s):  
Yasushi Sasaki ◽  
Manabu Iguchi ◽  
Mitsutaka Hino
Keyword(s):  
Linear Relationship ◽  
Strain Gauge ◽  
Diffraction Method ◽  
Local Strain ◽  
Electron Backscattering ◽  
Hematite Phase ◽  
Compression Strain ◽  
Electron Backscattering Diffraction ◽  
Ebsd Technique ◽  
The Relationship

Based on the relationship between quantified blurring degree of Kikuchi bands obtained by an electron backscattering diffraction (EBSD) technique and macroscopic strains measured by a strain gauge, the local compression strain SEBSD in sinter ore has been evaluated under various conditions. There is a good linear relationship between the SEBSD and the strains measured by a strain gauge. The local strain SEBSD evaluated by EBSD patterns can be used as an index of local strains.

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