Evaluation of Retained Austenite Phase of Hardened Layer on Carburized ChromeMolybdenum Steel after Quenching Using Electron Backscattering diffraction method

2017 ◽  
Vol 2017.66 (0) ◽  
pp. 831
Author(s):  
Toshihide YAMADA ◽  
Yoshihisa SAKAIDA
Keyword(s):  
Retained Austenite ◽  
Diffraction Method ◽  
Hardened Layer ◽  
Austenite Phase ◽  
Electron Backscattering ◽  
Electron Backscattering Diffraction

scholarly journals Estimation of Cross-Sectional Residual Stress Distributionon Hardened Layer of Carburized Chromium-Molybdenum Steel by Electron Backscattering Diffraction Method

2014 ◽  
Vol 996 ◽  
pp. 556-561
Author(s):  
Yoshihisa Sakaida ◽  
Tomohito Inayama ◽  
Shigeki Yashiro
Keyword(s):  
Residual Stress ◽  
Compressive Residual Stress ◽  
Diffraction Method ◽  
Hardened Layer ◽  
Case Depth ◽  
Polished Surface ◽  
Cross Sectional ◽  
Electron Backscattering ◽  
Electron Backscattering Diffraction ◽  
The Cross

A chromiummolybdenum steel composed of 0.20 mass% carbon was used as a starting material. Three kinds of specimens having different case depths were made by carburizing and quenching. Using the scanning electron microscope, the crystallographic information was measured on the cross-sectional hardened layer by EBSD (electron backscattering diffraction) technique. The KAM (kernel average misorientation, Θ) maps were calculated from the carburized surface to the interior below the case depth of each specimen. The area-average, Θmean, of the KAM map was compared to the case depth and the cross-sectional residual stress distribution measured by x-ray. As a result, the area-average of the hardened layer was larger than that of the interior of specimen after quenching. The estimated depth of the increment in the Θmean was found to accord to the case depth and be proportional to the depth in which large compressive residual stress was distributed on the gradually polished surface. Therefore, both the case depth and eigen strain distribution that induce the compressive residual stress are indirectly estimable by electron backscattering diffraction method.

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.

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

2005 ◽  
Vol 45 (4) ◽  
pp. 582-586 ◽  
Author(s):  
Yasushi SASAKI ◽  
Kenyu OHKAWARA ◽  
Manabu IGUCHI ◽  
Kuniyoshi ISHII ◽  
Mitsutaka HINO
Keyword(s):  
Diffraction Method ◽  
Electron Backscattering ◽  
Hematite Phase ◽  
Electron Backscattering Diffraction
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