X-ray diffraction analysis of residual stresses in textured ZnO thin films

Dobročka, Edmund; Novák, Patrik; Buc, D.; Harmatha, L.; Muŕın, Just́ın

doi:10.1016/j.apsusc.2016.06.060

Cited by 19 publications

(9 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reproduced with permission from Elsevier incidence X-ray diffraction (EPGIXD) technique was used to measure the residual stress depth profile and combined with rocking curve estimations for the coating absorption. In addition to the number of methods established for analysis of stresses, XRD methods, specifically the grazing instance set-up, are unique because of their ability to evaluate the stresses in very thin layers and analyse the depth difference in the stresses [147]. Kohri et al [148] investigated that X-ray diffraction techniques such as Cos α and Sin 2 Ψ methods for stress measurement.…”

Section: X-ray Diffraction Methodsmentioning

confidence: 99%

Assessment of Process, Parameters, Residual Stress Mitigation, Post Treatments and Finite Element Analysis Simulations of Wire Arc Additive Manufacturing Technique

Kumar

Manikandan

2021

Met. Mater. Int.

View full text Add to dashboard Cite

Wire arc additive manufacturing (WAAM) technique became an emerging manufacturing technology because of its costeffective in creating large-scale metal parts with moderately high deposition rates. Mainly, WAAM works through the utilization of heat source as an electric arc by melting the metal wire to build the three-dimensional metal parts in a layer-by-layer approach, which may significantly minimize the fabrication costs compared to powder and other additive manufacturing techniques such as laser and electron beam, similarly. This article reviews WAAM processes and methods and gives an exhaustive overview of the residual stresses, microstructures, and material properties of the as-fabricated and post-fabrication treated WAAM components. The typical defects during the fabrication of metal components by the WAAM process are residual stresses, deformity, porosity, and cracking. And also, methods on controlling residual stresses, improving material properties, and effects of post-processing treatments to enhance the part quality fabricated by using the WAAM process are recommended in this review. Finally, the measurement methods of residual stresses in the metal parts and FEA simulations in the WAAM are discussed. FEA simulations provide better insights on moving heat source model, temperature distributions, and residual stresses in the WAAM process. This article concludes that selecting process parameters affects the quality WAAM component during the deposition process. And also, approaches to improving the part quality are proposed. The materials fabrication issues in the WAAM processes were outlined, and the advanced WAMM processes were suggested to obtain high quality and defect-free WAAM parts.

show abstract

Section: X-ray Diffraction Methodsmentioning

confidence: 99%

Assessment of Process, Parameters, Residual Stress Mitigation, Post Treatments and Finite Element Analysis Simulations of Wire Arc Additive Manufacturing Technique

Kumar

Manikandan

2021

Met. Mater. Int.

View full text Add to dashboard Cite

show abstract

“…For example, in the recent works, [12][13][14][15] nonlinear mathematical model was derived using the higher-order shear deformation theory and Green-Lagrange nonlinear strains, in which the structure is exposed to nonuniform temperature field combined with the transversely distributed mechanical load. To characterize residual stress, many destructive and nondestructive methods are proposed, that is, X-ray diffraction, 16 Raman spectroscopy, 17 and neutron diffraction. 18 Alternatively, the finite element method has been demonstrated as an effective tool to predict the residual stress in response to complex thermomechanical loadings, that is, evaluation of the values and distribution of residual stress, 19 influence of the machining sequence 20 on residual stress redistribution and improvement, and relief of residual stress.…”

Section: Introductionmentioning

confidence: 99%

New insight into residual stresses in amine-grafted MWCNTs/binary resin composites under complex thermomechanical loadings

Wang

Chen

Cao

et al. 2018

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

Herein, we detailed the distributions and distortions of residual stresses in amine-grafted multiwalled carbon nanotubes (MWCNTs)/binary resin composites under complex thermomechanical loadings suffered in practical processing or operation, by means of finite element simulation. First, distributions and distortions of residual stresses under coupled extensional–shear loadings were studied. Subsequently, thermal residual stresses were deducted from the thermal analysis, followed by a sequentially structural analysis. It is found that the heat flux has an influence on the magnitude of the thermal residual stresses, but it cannot alter the distribution of the thermal residual stresses. In order to render deep understanding of the microscale behavior in amine-grafted MWCNTs/binary resin composites under thermal loading, for exploring the nature of residual stress variation, the corresponding microscale model is expected to be developed using atomistic simulation, in which the microstructural features of amine-grafted MWCNTs and resin matrix are taken into consideration. The total energy, potential energy, and kinetic energy at different temperature were analyzed as well as the radial distribution function g( r). Weak van der Waals interaction between amine-grafted MWCNTs and resin matrix is indicated and the interactions between amine-grafted MWCNTs and resin matrix reduce and the mobility of chain segments of resin matrix increases with the decreasing temperature.

show abstract

“…To evaluate the stress distribution on the surface of components, the stress should be measured at first. At present, the main nondestructive testing methods of stress include X ray diffraction, neutron diffraction, ultrasonic techniques and magnetic techniques [ 1 – 10 ], etc. Among these methods, magnetic techniques have the advantages of safety, low cost, highly sensitive and no need of coupling agent.…”

Section: Introductionmentioning

confidence: 99%

Estimation of stress distribution in ferromagnetic tensile specimens using low cost eddy current stress measurement system and BP neural network

Zhang

Zeng

et al. 2017

PLoS ONE

View full text Add to dashboard Cite

Estimation of the stress distribution in ferromagnetic components is very important for evaluating the working status of mechanical equipment and implementing preventive maintenance. Eddy current testing technology is a promising method in this field because of its advantages of safety, no need of coupling agent, etc. In order to reduce the cost of eddy current stress measurement system, and obtain the stress distribution in ferromagnetic materials without scanning, a low cost eddy current stress measurement system based on Archimedes spiral planar coil was established, and a method based on BP neural network to obtain the stress distribution using the stress of several discrete test points was proposed. To verify the performance of the developed test system and the validity of the proposed method, experiment was implemented using structural steel (Q235) specimens. Standard curves of sensors at each test point were achieved, the calibrated data were used to establish the BP neural network model for approximating the stress variation on the specimen surface, and the stress distribution curve of the specimen was obtained by interpolating with the established model. The results show that there is a good linear relationship between the change of signal modulus and the stress in most elastic range of the specimen, and the established system can detect the change in stress with a theoretical average sensitivity of -0.4228 mV/MPa. The obtained stress distribution curve is well consonant with the theoretical analysis result. At last, possible causes and improving methods of problems appeared in the results were discussed. This research has important significance for reducing the cost of eddy current stress measurement system, and advancing the engineering application of eddy current stress testing.

show abstract

X-ray diffraction analysis of residual stresses in textured ZnO thin films

Cited by 19 publications

References 26 publications

Assessment of Process, Parameters, Residual Stress Mitigation, Post Treatments and Finite Element Analysis Simulations of Wire Arc Additive Manufacturing Technique

Assessment of Process, Parameters, Residual Stress Mitigation, Post Treatments and Finite Element Analysis Simulations of Wire Arc Additive Manufacturing Technique

New insight into residual stresses in amine-grafted MWCNTs/binary resin composites under complex thermomechanical loadings

Estimation of stress distribution in ferromagnetic tensile specimens using low cost eddy current stress measurement system and BP neural network

Contact Info

Product

Resources

About