Residual Stress in Thin Films of Rf-Sputtered Aluminum by X-ray Multtaxial Stress Measurement

1995 ◽  
Vol 39 ◽  
pp. 433-438
Author(s):  
Shoukhi Ejiri ◽  
Zheng Lin ◽  
Tosihiko Sasaki ◽  
Yukio Hirose
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Residual Stresses ◽  
Stress Measurement ◽  
Multiaxial Stress ◽  
Argon Gas ◽  
X Ray

Residual stress in thin films of RF-sputtered aluminum coated on substrate of glass was measured by X-ray multiaxial stress measurement. The films were manufactured under the various conditions such as temperature of substrate ranged from 473K to 573K, and pressure of argon gas range from 0.0093Pato 13.3Pa respectively. These results brought comprehension that residual stress existed in tri-axial and that was influenced by temperature of substrate and pressure of argon gas. Residual stresses were unstable in range of less than 1.33Pa of pressure of argon gas.

Residual Stress in Thin Films of Rf-Sputtered Aluminum by X-Ray Multiaxial Stress Measurement

1997 ◽  
pp. 433-438
Author(s):  
Shouichi Ejiri ◽  
Zheng Lin ◽  
Tosihiko Sasaki ◽  
Yukio Hirose
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Stress Measurement ◽  
Multiaxial Stress ◽  
X Ray

Measurement of Residual Stresses in Thin Films by Two-Dimensional XRD

2006 ◽  
Vol 524-525 ◽  
pp. 613-618 ◽  
Author(s):  
Bob B. He
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Residual Stresses ◽  
Recent Progress ◽  
Stress Measurement ◽  
Incident Angle ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Residual Stress Analysis

This paper introduces the recent progress in two-dimensional X-ray diffraction as well as its applications in residual stress analysis in thin films. The stress measurement with twodimensional x-ray diffraction can be done with low incident angle and is not limited to the peaks with high two-theta angles like the conventional method. When residual stresses of thin films are measured, a low incident angle is preferred to maximize the diffraction signals from the thin films surfaces instead of from the substrates and matrix materials. Since one stress measurement at one fixed incident angle is possible, stress gradients in depth can be measured by series of incident angles. Some experimental examples are given to show the stress measurement at low and fixed incident angle.

Influence of deposition parameters on the residual stresses of WC-Wo sputtered thin films

MRS Advances ◽  
2020 ◽  
Vol 5 (23-24) ◽  
pp. 1215-1223
Author(s):  
R.R. Phiri ◽  
O.P. Oladijo ◽  
E.T. Akinlabi
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Residual Stresses ◽  
Substrate Surface ◽  
Tribological Performance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Compressive Stresses ◽  
Deposition Parameters ◽  
Cobalt Thin Films

AbstractControl and manipulation of residual stresses in thin films is a key for attaining coatings with high mechanical and tribological performance. It is therefore imperative to have reliable residual stress measurements methods to further understand the dynamics involved. The sin2ψ method of X-ray diffraction was used to investigate the residual stresses on the tungsten carbide cobalt thin films deposited on a mild steel surface to understand the how the deposition parameters influence the generation of residual stresses within the substrate surface. X-ray spectra of the surface revealed an amorphous phase of the thin film therefore the stress measured was of the substrate surface and the effects of sputtering parameters on residual stress were analysed. Compressive stresses were identified within all samples studied. The results reveal that as the sputtering parameters are varied, the residual stresses also change. Optimum deposition parameters in terms of residual stresses were suggested.

Wheel Rim Axial Residual Stress and a Proposed Mechanism for Vertical Split Rim Formation

2011 ◽  
Author(s):  
Cameron Lonsdale ◽  
John Oliver
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Stress Measurement ◽  
Axial Stress ◽  
X Ray Diffraction ◽  
X Ray ◽  
Axial Residual Stress ◽  
Railroad Wheels ◽  
Hoop Stresses ◽  
Future Work

Railroad wheels are manufactured with beneficial residual compressive hoop stresses, which are imparted by rim quenching and tempering. Hoop and radial residual stresses for wheels have been studied in detail by various organizations over the years and are relatively well characterized. However axial residual stresses, in the orientation across the rim width from back rim face to front rim face, have not been extensively investigated. This paper describes a failure mode known as a vertical split rim (VSR) and describes efforts to measure the axial residual stresses in, 1) new wheels, 2) service worn wheels and 3) wheels that have failed from VSRs. Initial axial residual stress measurement efforts, using core drilling and x-ray diffraction from the tread surface, are briefly reviewed. Further more extensive work using x-ray diffraction to measure axial residual stress on radial wheel slices is described and data are presented, focusing on differences between the three wheel types. The concept of Axial Stress Amplification (ASA) is outlined, and the relationship of axial residual stress to VSRs is discussed. A proposed mechanism for VSR formation is described. Future work, with a goal of reducing or eliminating VSRs in service, is considered.

Residual Stress of Aluminum Thin Films Sputtered on Silicon Wafers Measured by X-Ray Diffraction

1995 ◽  
Vol 39 ◽  
pp. 267-279
Author(s):  
Keisuke Tanaka ◽  
Keisaku Ishihara ◽  
Yoshiaki Akiniwa
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Stress Measurement ◽  
Biaxial Tension ◽  
Film Surface ◽  
Fiber Texture ◽  
Fiber Axis ◽  
X Ray ◽  
Plane Normal ◽  
Out Of Plane

A new method of the X-ray stress measurement was proposed for measuring the residual stress in Al thin films having the [111] fiber texture with the fiber axis perpendicular to the film surface. The strain was measured from Al 222 and 311 diffractions obtained by Cr-Kα radiation. The values of in-plane residual stresses σ11, σ22 and σ12, and out-of-plane normal residual stress, σ33 were determined from the measured strains by using the fundamental formulae derived on the basis of Reuss and Voigt models. The measured residual stress in the thin films was nearly equi-biaxial tension. The magnitude of the tensile residual stress decreased with increasing film thickness.

Investigation of Residual Stress in Green Compacts of Metal Powder Using X-Ray Diffraction

2012 ◽  
Vol 554-556 ◽  
pp. 461-464 ◽  
Author(s):  
Rui Zhou ◽  
Lian Hong Zhang ◽  
Yu Hong Liu
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Significant Influence ◽  
Stress Measurement ◽  
X Ray Diffraction ◽  
X Ray ◽  
American Standard ◽  
Compaction Processes ◽  
Compacting Pressure

Residual stresses in green compacts have a significant influence on the quality of the compact and post-compaction processes like part handling. In this study, the latest European and American standard for residual stress measurement by X-ray diffraction have been used to obtain more exact residual stresses in surface of green compacts as experimental evidence for simulation. The influence of kinds of powders, compacting pressure and friction on residual stresses in green compact has been studied.

scholarly journals X-Ray Diffraction Technique for Residual Stress Measurement in NiCrMo Alloy Weld Metal

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Vladimir Ivanovitch Monine ◽  
João da Cruz Payão Filho ◽  
Rodrigo Stohler Gonzaga ◽  
Elisa Kimus Dias Passos ◽  
Joaquim Teixeira de Assis
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Weld Metal ◽  
Welded Joint ◽  
Stress Measurement ◽  
Steel Wire ◽  
X Ray Diffraction ◽  
X Ray ◽  
Wire Brushing ◽  
Alloy Weld

In the present work, residual stresses in nickel-based (Ni 625) superalloy weld metal of a 9%Ni steel-welded joint were measured by X-ray diffraction (XRD). This technique presents some difficulties in performing measurements in coarse and preferentially oriented weld metal microstructures. It is proposed a preliminary surface treatment by rotating steel wire brushing to perform the stress analysis through XRD technique possible for this kind of material. Stress measurements with proposed XRD technique showed that the stress state in Ni 625 weld metal on the outside surface of the welded joint is characterised by tensile stresses in the transverse and longitudinal directions, while compressive transverse and tensile longitudinal residual stresses are developed in the root pass region.

Residual Stress Measurement Of High Molecular Matter By Transmission X-Ray Diffraction

2011 ◽  
Vol 681 ◽  
pp. 381-386 ◽  
Author(s):  
Masashi Kitamura ◽  
Nishida Masayuki ◽  
Hanabusa Takao
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Stress Measurement ◽  
Quantitative Estimation ◽  
Regression Line ◽  
Polymeric Materials ◽  
Residual Stress Measurement ◽  
Stress Distributions ◽  
Transmission Method ◽  
X Ray

In this study, the residual stresses in high-density polyethylene (HDPE) were measured using an x-ray stress measurement technique. There have been few reports published of residual stress investigations in polymeric materials by x-ray stress measurements based on conventional x-ray reflection methods. There are two problems associated with this measurement. Firstly, the diffraction peaks of the polymer in the low 2q angle region and therefore the measurement accuracy for strains reduces. Secondly, the low 2q angle region makes it extremely difficult to use the sin2ψmethod. In the present study we tried to use a transmission method for measuring the residual stress in HDPE sample to resolve these problems. The HDPE sample is shaped into thin sheets which have the three kinds of crystallinity degrees. The measured data is fitted with a good linear regression line in a d-sin2ψdiagram and gradient of the regression line corresponded to the applied stress. On the other hand, the results of the residual stress measurement are deeply associated with degrees of the crystallinity in the HDPE material. The quantitative estimation of crystallinity degrees in the HDPE material was accomplished by a sink-float method. The residual stress distributions were discussed between micro-residual stresses in the crystal phase of HDPE with the amorphous phase of it. Finally, x-ray elastic constant (XEC) of HDPE was estimated and the Initial residual stresses were also measured by use of this XEC parameter.

Residual Stress Measurements on IN718 Fatigue Specimens Using X-Ray Diffraction Techniques

2016 ◽  
Vol 879 ◽  
pp. 578-582
Author(s):  
Yi Fei Gao ◽  
Shu Lan Wang
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Stress Measurement ◽  
Low Cycle Fatigue ◽  
Stress Gradient ◽  
X Ray Diffraction ◽  
Special Requirement ◽  
X Ray ◽  
Stress Measurements ◽  
Surface Residual Stresses

Residual stress measurements were successfully performed on the representative IN718 fatigue specimens by X-Ray Diffraction. All surface residual stresses were found to be compressive. A stress gradient normal to the surface was observed on all specimens. The residual stresses tended to become less compressive with increasing depth into the parts. Residual stress measurement is the special requirement for NADCAP CRITERIA AC 7101/7. In this paper, residual stress measurements were successfully performed on two IN718 low cycle fatigue test specimens.

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