I.S. CEN ISO TS 21432:2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
   4.1 Symbols
   4.2 Subscripts
   4.3 Abbreviated terms
5 Summary of method
   5.1 Preamble
   5.2 Outline of principle - Bragg's law
   5.3 Neutron sources
   5.4 Strain measurement
   5.5 Neutron diffractometers
   5.6 Stress determination
6 Preparations for measurements
   6.1 Preamble
   6.2 Alignment and calibration of the instrument
   6.3 Choice of diffraction conditions
        6.3.1 Monochromatic instruments
        6.3.2 TOF instruments
   6.4 Positioning procedures
   6.5 Gauge volumes
   6.6 Determination of a strain free or reference lattice
        spacing
7 Material characterization
   7.1 Preamble
   7.2 Composition
   7.3 Thermal/mechanical history
   7.4 Phases and crystal structures
   7.5 Homogeneity
   7.6 Microstructure
   7.7 Texture
8 Recording requirements and measurement procedure
   8.1 Preamble
   8.2 Recording requirements
        8.2.1 General information - instrument
        8.2.2 General information - specimen
        8.2.3 Specific information required for each strain
               measurement
   8.3 Specimen co-ordinates
   8.4 Positioning of the specimen
   8.5 Measurement directions
   8.6 Number and location of measuring positions
   8.7 Gauge volume
   8.8 Gauge volume centroid considerations
   8.9 Temperature
9 Calculation of stress
   9.1 Preamble
   9.2 Normal stress determinations
   9.3 Stress state determinations
        9.3.1 The sin[2][psi] method
   9.4 Choice of elasticity constants
   9.5 Data analysis
        9.5.1 Peak fitting function
        9.5.2 Background function
        9.5.3 Peak to background ratio
        9.5.4 Distorted peak profiles
10 Reliability of results
11 Reporting
   11.1 Preamble
   11.2 Strain or stress values
        11.2.1 Stress free or reference lattice spacing
        11.2.2 Conversion of strain to stress
        11.2.3 Elasticity constants
        11.2.4 Positioning
   11.3 Neutron source and instrument
   11.4 General measurement procedures
   11.5 Specimens/materials properties
   11.6 Original data
Annex A (informative) Measurement procedures
Annex B (informative) Determination of uncertainties in a
                      measurand
Bibliography

Gives the standard test method for determining residual stresses in polycrystalline materials by neutron diffraction. It is applicable to homogeneous and inhomogeneous materials and to test pieces containing distinct phases.