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Are data correctly fitted by the sin2 ψ and similar methods?

  • Balder Ortner
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 9

Abstract

The sin2 ψ method is a frequently used, very successful method for data evaluation in X-ray or neutron stress measurements, but besides all its merits it also has a number of disadvantages and shortcomings. One of the shortcomings is the fact that in the general case of an in-plane stress measurement the method is not a correct least-squares fit. This results in an unnecessary loss of accuracy of the calculated stress tensor. The same must be said about some other methods which are similar to the sin2 ψ method, inasmuch as they also rely on a linear dependence of measured data on sin2 ψ or some other function of ψ. This is proved by analyzing the mathematical basis of these methods.

Keywords: Stress; Texture; X-ray; Neutron; X-ray stress factors
* Correspondence address, Ao Univ. Prof. Dr. Balder Ortner, Institut für Materialphysik, Montan universität Leoben, A-8700 Leoben, Austria, Tel.: +43 3842 804 315, Fax: +43 3842 804 116, E-mail:

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Received: 2007-9-14
Accepted: 2008-5-16
Published Online: 2013-06-11
Published in Print: 2008-09-01

© 2008, Carl Hanser Verlag, München

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  2. Contents
  3. Basic
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  20. Notification
  21. DGM News
https://doi.org/10.3139/146.101727
Keywords for this article
Stress; Texture; X-ray; Neutron; X-ray stress factors

Articles in the same Issue

  1. Contents
  2. Contents
  3. Basic
  4. Critical temperature for massive transformation in ultra-low-carbon Fe–C alloys
  5. Are data correctly fitted by the sin2 ψ and similar methods?
  6. Liquidus surface projection of the Fe–Co–C ternary system in the iron-rich corner
  7. Prediction of thermodynamic activities in binary iron-based alloys using two-point Padé approximants
  8. Study of fatigue dislocation structures in [233] coplanar double-slip-oriented copper single crystals using SEM electronic channelling contrast
  9. Microstructures at high temperature of Fe-30 wt.% Cr-xC Alloys with x varying from 0 to 2 wt.%
  10. The effect of cooling rate on the microstructure and mechanical properties of Mg–Zn–Gd-based alloys
  11. The effect of thermal exposure on the microstructure and hardness of as-cast Mg–Zn–Al alloys with Sn addition
  12. Applied
  13. Deformation and fracture of Ti-base nanostructured composite
  14. Microstructure and some properties of FeCr25Co15 alloy subjected to plastic deformation by complex load
  15. Determination of the concentration dependent diffusion coefficient of nitrogen in expanded austenite
  16. Suitability of maraging steel weld cladding for repair of die casting tooling
  17. Catalytic performance of Fe-, Pd-, and Pd–Fe- mordenites in simulated hydrocarbon-selective catalytic reduction of N2O by methane in a model flue-gas from nitric acid plants
  18. Thermodynamic consideration and experimental study on the preparation of heat-treated hollow nickel fibres
  19. A model for the intrinsic kinetic parameters of the direct reduction of MoS2 with hydrogen
  20. Notification
  21. DGM News
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