Residual stress estimation of a silicon carbide-Kovar joint

1991 ◽  
Vol 26 (11) ◽  
pp. 2887-2892 ◽  
Author(s):  
Toshihiro Yamada ◽  
Motohiro Satoh ◽  
Akiomi Kohno ◽  
Kazuaki Yokoi
Keyword(s):  
Residual Stress ◽  
Silicon Carbide ◽  
Stress Estimation

scholarly journals Feasibility of Residual Stress Nondestructive Estimation Using the Nonlinear Property of Critical Refraction Longitudinal Wave

2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
Yu-Hua Zhang ◽  
Xin-Xin Li ◽  
Xiang-Hong Wang ◽  
Zhen-Feng Huang ◽  
Han-Ling Mao ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress State ◽  
Wave Velocity ◽  
Nonlinear Coefficient ◽  
Quantitative Information ◽  
Difficult Problem ◽  
Nonlinear Property ◽  
Deformation State ◽  
Stress Estimation ◽  
Nondestructive Estimation

Residual stress has significant influence on the performance of mechanical components, and the nondestructive estimation of residual stress is always a difficult problem. This study applies the relative nonlinear coefficient of critical refraction longitudinal (LCR) wave to nondestructively characterize the stress state of materials; the feasibility of residual stress estimation using the nonlinear property of LCR wave is verified. The nonlinear ultrasonic measurements based on LCR wave are conducted on components with known stress state to calculate the relative nonlinear coefficient. Experimental results indicate that the relative nonlinear coefficient monotonically increases with prestress and the increment of relative nonlinear coefficient is about 80%, while the wave velocity only decreases about 0.2%. The sensitivity of the relative nonlinear coefficient for stress is much higher than wave velocity. Furthermore, the dependence between the relative nonlinear coefficient and deformation state of components is found. The stress detection resolution based on the nonlinear property of LCR wave is 10 MPa, which has higher resolution than wave velocity. These results demonstrate that the nonlinear property of LCR wave is more suitable for stress characterization than wave velocity, and this quantitative information could be used for residual stress estimation.

Effect of the Type of Grinding Wheel on the Surface Characteristics of a Titanium Alloy with Internal Coolant Supply

2019 ◽  
Vol 825 ◽  
pp. 92-98
Author(s):  
Nakatsuka Nagatoshi ◽  
Sumito Toyokawa ◽  
Atsushi Kusakabe ◽  
Shinya Nakatsukasa ◽  
Hiroyuki Sasahara
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Silicon Carbide ◽  
Titanium Alloy ◽  
Aluminum Oxide ◽  
Compressive Residual Stress ◽  
Surface Characteristics ◽  
Grinding Wheel

The objective of this paper is to clarify the effect of grinding surface characteristics in the grinding of a titanium alloy with a coolant supply from the inner side of the grinding wheel. In this paper, we selected a white aluminum oxide (WA) vitrified bonded grinding wheel and a green silicon carbide (GC) vitrified bonded grinding wheel, and compared their grinding characteristics. As a result, in the case of the GC vitrified bonded grinding wheel, the surface roughness decreased by about 54% and the compressive residual stress increased by about 128%.

Residual stress estimation in ferroelectricPbTiO3thin films by Raman spectroscopy

2009 ◽  
Vol 79 (10) ◽  
Author(s):  
A. Bartasyte ◽  
S. Margueron ◽  
J. Kreisel ◽  
P. Bourson ◽  
O. Chaix-Pluchery ◽  
...  
Keyword(s):  
Residual Stress ◽  
Raman Spectroscopy ◽  
Stress Estimation

Residual Stress Estimation of Ti Casting Alloy by X-ray Single Crystal Measurement Method

2008 ◽  
Author(s):  
A. Shiro ◽  
M. Nishida ◽  
T. Jing ◽  
Abarrul Ikram ◽  
Agus Purwanto ◽  
...  
Keyword(s):  
Residual Stress ◽  
Single Crystal ◽  
Measurement Method ◽  
Casting Alloy ◽  
X Ray ◽  
Stress Estimation
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