Paper Title:
A Step towards a Complete Uncertainty Analysis of Residual Stress Determination Using Neutron Diffraction
  Abstract

Up to now the tendency in residual stress determination (using neutron diffraction) has been to assess the uncertainties in terms of the propagation of ‘fitting uncertainty’ of the Bragg peaks only. There are many other sources of uncertainty, some more obvious than others, that should be taken into account or at least be considered in terms of their impact when interpreting the data. These cover not just the instrument calibration and characteristics and the technique itself but also the properties of the sample. A discussion of how best to combine the uncertainty of all contributing factors will be made. These factors (on the sample side) will include variations in chemical composition, grain size related problems, surfaces/interfaces cutting through the sampling volume, texture variations within the sampling volume, presence of intergranular strains (plastic anisotropy) etc. The knowledge of appropriate elastic constants, for example, and their uncertainty is necessary for a more reliable stress determination. One should also be aware of the more subtle influences on the elastic constants such as texture or chemical variation. This should be a step in the right direction for a ‘unified uncertainty analysis’ covering all possible aspects of uncertainty in residual stress determination using neutron diffraction.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
2487-2492
DOI
10.4028/www.scientific.net/MSF.638-642.2487
Citation
R. C. Wimpory, C. Ohms, "A Step towards a Complete Uncertainty Analysis of Residual Stress Determination Using Neutron Diffraction", Materials Science Forum, Vols. 638-642, pp. 2487-2492, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Pu Lin Nie, Yao Shen, Jie Yang, Qiu Long Chen, Xun Cai
Abstract:Cross-sectional nanoindentation (CSN) is a new method for measuring interface adhesion of thin films. The interfacial energy release rate...
400
Authors: T. James Marrow, David Gonzalez, Mohsin Aswad, Joao Quinta Da Fonseca, Philip J. Withers
Abstract:A 3D model for intergranular thermal stresses in coarse polycrystalline alumina has been derived using Diffraction Contrast Tomography....
560
Authors: Hui Hui Zhao, Wen Fang Zhang
Chapter 3: Civil Engineering
Abstract:The application of ABAQUS finite element software non-linear finite element analysis of brick masonry walls with structural column. Build...
791
Authors: Wen Qing Wu, Xue Yuan Ma, Shuai Chen
Chapter 4: Novel Constructional Materials and Functional Materials, Analysis and Technology
Abstract:The compressive mechanical performance of bamboo strip plywood was studied in the paper. Based on analysis of the related experiments datum ,...
640
Authors: F.C. Cione, J.L. Rossi, A.C. Souza, S. Delijaicov, M.A. Colosio
Chapter 3: Ceramics II
Abstract:Many engineering specifications, manufacturing procedures, inspection and quality control have begun to require that the residual stress of a...
1925