X-Ray Residual Stress Measurement of Ground Tungsten Carbides with Various Cobalt Contents

1995 ◽  
Vol 39 ◽  
pp. 311-318
Author(s):  
Masaharu Miyano ◽  
Yukio Hirose
Keyword(s):  
Residual Stresses ◽  
Stress Measurement ◽  
Diffraction Method ◽  
Diamond Wheel ◽  
Tungsten Carbides ◽  
X Ray ◽  
Three Point Bending ◽  
Grinding Conditions ◽  
Co Addition ◽  
Straight Lines

The X-ray diffraction method was applied to the measurement of residual stresses on the ground or polished surfaces of WC-Co alloys with various Co contents. The X-ray diffractions of WC 211 by Cu K α radiation were used for the stress measurement. The residual stresses on the ground or polished surfaces were all compression. For the same Co content, the compressive value increased with increasing surface roughness. The maximum residua) stress, which was -2.13 GPa, was observed in WC-5.5wt%Co ground with a #140 diamond wheel.The bending strengths of each alloys were obtained by three point bending tests. The bending strengths were influenced by grinding conditions and Co contents. The maximum value of 3.6 GPa was obtained in WC-16.0wt%Co ground with a #140 diamond wheel.For the same Co addition, the bending strengths were closely related to the residual stresses, These relations were approximated by straight lines.

X-ray Residual Stress Measurement of Ground Surface of Metal-Ceramic Composite

1990 ◽  
Vol 34 ◽  
pp. 679-687 ◽  
Author(s):  
Zenjiro Yajima ◽  
Yukio Hirose ◽  
Yoichi Kishi ◽  
Kaisuke Tanaka
Keyword(s):  
Residual Stresses ◽  
Ceramic Composite ◽  
Stress Measurement ◽  
Ground Surface ◽  
Diffraction Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Ceramic ◽  
Grinding Conditions ◽  
Machine Parts

Machine parts made of ceramics are usually finished by grinding. Residual stresses as well as defects introduced by grinding will influence the fracture strength and the function of the ceramic parts. Although several investigators measured the grinding residual stresses by the X-ray diffraction method, their grinding conditions were rather limited.

X-ray Measurement of Grinding Residual Stress in Alumina Ceramics

1988 ◽  
Vol 32 ◽  
pp. 443-449 ◽  
Author(s):  
Hiroyuki Yoshida ◽  
Yukio Hanayama ◽  
Yoshitaka Morimoto ◽  
Yukio Hirose ◽  
Keisuke Tanaka
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Diffraction Method ◽  
Diamond Wheel ◽  
Depth Of Cut ◽  
Alumina Ceramics ◽  
Ray Method ◽  
X Ray ◽  
Size Number ◽  
Grinding Conditions

Machine parts made of ceramics are usually finished by grinding. Residual stresses as well as defects introduced by grinding will influence the fracture strength and the function of ceramics parts. Although several investigations used the X-ray diffraction method to measure the grinding residual stresses, their grinding conditions were rather limited.In the present study, sintered alumina ceramics of 99% purity were ground with a resinoid diamond wheel (#140 grain size number) under various grinding conditions. The effects of depth of cut and stock removal on the residual stress was measured with the X-ray method.

A Study on Area Detector Type Diffraction Stress Measurement and its Application to Shelling Problem in Railway Tracks

2010 ◽  
Vol 638-642 ◽  
pp. 2458-2463 ◽  
Author(s):  
Toshihiko Sasaki ◽  
Osama Yaguchi ◽  
Yuichi Kobayashi
Keyword(s):  
Residual Stresses ◽  
Stress Analysis ◽  
Stress Measurement ◽  
Rolling Contact ◽  
Triaxial Stress ◽  
X Ray ◽  
Rail Head ◽  
Area Detector ◽  
Grinding Conditions ◽  
Detector Type

In order to study on the effects of grinding of rail head on rolling contact fatigue of rails, residual stress measurements were conducted for rails processed under different grinding conditions. In this study, residual stresses in rails used for a service line were measured with the method of X-ray stress measurement. The triaxial stress analysis was conducted using a new method for an area detector type X-ray stress analysis proposed by the authors. Four grinding conditions were used to rail specimens. The distributions of residual stresses in the surface layer of the rail head were obtained. It was found that the tensile residual stresses were generated at the field-side of the ground rai1, and that the triaxial stress state was formed in the surface of the rail head widely.

X-Ray Stress Measurement of Fiber Reinforced Plastics Composite Material

2007 ◽  
Vol 353-358 ◽  
pp. 2423-2426 ◽  
Author(s):  
Nishida Masayuki ◽  
Hanabusa Takao ◽  
Yasukazu Ikeuchi
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Stress Measurement ◽  
Diffraction Method ◽  
Longitudinal Direction ◽  
Residual Stress Measurement ◽  
Fiber Reinforced ◽  
Transmission Method ◽  
Polyethylene Matrix ◽  
X Ray

X-ray stress measurement with sin2ψ method is one of useful tools to detect residual stresses in manufactured products. In this study, the residual stresses in the tungsten fiber reinforced polyethylene composite were examined by X-ray stress measurement technique. The transmission diffraction method was employed in residual stress measurement of polyethylene matrix. The X-ray elastic constant of high density polyethylene (HDPE) which formed matrix of the composite was estimated before residual stress measurement. The results of sin2ψ diagram with transmission method show good linearity under the several tensile loading. After that the residual stresses in the composite were investigated for HDPE matrix phase. From the measurement results, the tensile residual stresses existed in fiber longitudinal direction and compressive ones in transverse direction for HDPE matrix.

The Experimental Study of Diffraction Angle of Aluminum Alloy 3003

2012 ◽  
Vol 625 ◽  
pp. 291-296
Author(s):  
Neng Quan Duan ◽  
Jian Liang Ren ◽  
Rui Qiang Pang
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Stress Measurement ◽  
Electrical Measuring ◽  
Diffraction Method ◽  
Measuring Method ◽  
X Ray ◽  
Equal Strength ◽  
Diffraction Angle ◽  
Stress Measuring

The most suitable diffraction angle of aluminum alloy 3003 used for stress measuring is aimed to be determined in this paper. The experiment makes a stress measurement of a loading aluminum alloy 3003 equal strength beam with the traditional electrical measuring method and the X-ray stress measurement. With the electrical measuring method as reference, the research study the measured values that acquired from the X-ray diffraction method when the diffraction angle are 142° and 156°, and then compare them with that acquired from electrical measuring method. The measurement results demonstrate that the diffraction angle at 156 ° is better than at 142 ° based on the assessment standards of the liner slope and the distribution of data. Thus the optimum diffraction angle for X-ray to measure the macroscopic stress of aluminum alloy 3003 is 156 °. In this paper，the stress caused by the load on the equal strength beam is assumed to be "residual stress" and thus the conclusion has reference values for the standardization of residual stress measurement of aluminum alloy by XRD and has theoretical guiding significance in the production practices.

X-ray residual stress analysis of cylindrically curved surfaces—estimation of circumferential distributions of residual stresses

2003 ◽  
Vol 38 (5) ◽  
pp. 459-468 ◽  
Author(s):  
T Oguri ◽  
K Murata ◽  
Y Sato
Keyword(s):  
Residual Stresses ◽  
Least Squares Method ◽  
Stress Measurement ◽  
Incident Angle ◽  
Axial Stress ◽  
Circumferential Stress ◽  
Distribution Functions ◽  
Scanning Method ◽  
X Ray ◽  
Reference Axis

A new measuring technique utilizing X-ray diffraction is proposed in order to estimate the circumferential distributions of residual stresses on convex/concave cylindrical surfaces. This technique requires neither tilting X-ray beams in the circumferential direction in which the X-ray incident angle tends to be limited nor adjusting the normal of the irradiation area to the reference axis of the ψ angle. The circumferential distributions of the circumferential stress and of the axial stress are estimated from the diffraction angles at ψ = 0° and the axial stresses obtained by the stress measurement on multiple inclined areas on the cylindrical surfaces under the configuration of the axial stress measurement using the iso-inclination scanning method. This estimate technique was applied to two round bars of steel, one with circumferential distributions of the residual stresses and the other with almost uniform stresses. The distribution functions of the residual stresses were expanded to a couple of Fourier series, and the coefficients of them were determined by the least-squares method. The estimated distributions of the residual stresses were in good agreement with the actual ones.

Thermal Stress Estimation of Tungsten Fiber Reinforced Titanium Composite by In Situ X-Ray Diffraction Method

2013 ◽  
Vol 768-769 ◽  
pp. 335-342
Author(s):  
Nishida Masayuki ◽  
Haneoka Masashi ◽  
Matsue Tatsuya ◽  
Jing Tian ◽  
Hanabusa Takao
Keyword(s):  
Spot Welding ◽  
Stress Measurement ◽  
Diffraction Method ◽  
Fiber Reinforced ◽  
Titanium Matrix ◽  
Tungsten Fiber ◽  
X Ray ◽  
Manufacturing Method ◽  
Plate Area

The tungsten fiber reinforced titanium composite (W/Ti) was produced by the spot welding method. This manufacturing method used only a simple spot welding system, and it did not need a vacuum chamber and a high temperature furnace such as existing common methods. The arranged tungsten fibers were held between titanium plates (thickness 0.5mm) and fixed by spot welding. Therefore, this W/Ti composite produced by spot welding did not join at all positions between the tungsten fiber and the titanium matrix because of the partial welding in the spot welding point. The coverage, a rate of welding area to the whole plate area, became 150% for the sample in this study, because it should make up for the partial welding by this method. From the microscopic observation in the cross section of the W/Ti composite, it was conformed the good jointing in the whole position between the tungsten fiber and the titanium matrix. ON the other hand, the alteration of thermal residual stress under the thermal cycling was measured by the in-situ x-ray stress measurement technique. These results were discussed from the viewpoint of the thermal expansion coefficient between fiber and matrix.

Study on X-Ray Stress Analysis Using a New Position-Sensitive Proportional Counter

1978 ◽  
Vol 22 ◽  
pp. 233-240 ◽  
Author(s):  
Yasuo Yoshioka ◽  
Ken-ichi Hasegawa ◽  
Koh-ichi Mochiki
Keyword(s):  
Residual Stresses ◽  
Proportional Counter ◽  
Counting Rate ◽  
Angular Resolution ◽  
Stress Measurement ◽  
Over The Counter ◽  
X Ray ◽  
Position Sensitive ◽  
The Mean ◽  
Time Required

A position-sensitive proportional counter suitable for the X-ray stress measurement has been developed and residual stresses were measured with an apparatus that uses this PSD system. The counter was designed to have a good angular resolution over the counter length for the diffracted X-ray beam and high counting rates. The mean angular resolution measured was about 0.2° in 2θ (FWHM) at 200 mm, and the maximum allowable counting rate reached about 40,000 cps.The time required for the data accumulation was shown to be 1/10 to 1/30 of the time required with a standard diffractometer.

Sign in / Sign up

Export Citation Format

Share Document