Hivatkozási szám

MSZ EN ISO 21432:2021

Dokumentumazonosító

176403

Cím

Roncsolásmentes vizsgálat. Szabványos vizsgálati módszer a maradó feszültség neutrondiffrakciós meghatározására (ISO 21432:2019)

Angol cím

Non-destructive testing. Standard test method for determining residual stresses by neutron diffraction (ISO 21432:2019)

Alkalmazási terület

This document describes the test method for determining residual stresses in polycrystalline materials by neutron diffraction. It is applicable to both homogeneous and inhomogeneous materials including those containing distinct phases. The principles of the neutron diffraction technique are outlined. Suggestions are provided on: — the selection of appropriate diffracting lattice planes on which measurements should be made for different categories of materials, — the specimen directions in which the measurements should be performed, and — the volume of material examined in relation to the material grain size and the envisaged stress state. Procedures are described for accurately positioning and aligning test pieces in a neutron beam and for precisely defining the volume of material sampled for the individual measurements. The precautions needed for calibrating neutron diffraction instruments are described. Techniques for obtaining a stress-free reference are presented. The methods of making individual measurements by neutron diffraction are described in detail. Procedures for analysing the results and for determining their statistical relevance are presented. Advice is provided on how to determine reliable estimates of residual stresses from the strain data and on how to estimate the uncertainty in the results.

ICS

19.100 Roncsolásmentes vizsgálat

Műszaki Bizottság

A szabvány nyelve

angol

Az érvényesség kezdete

2021-02-01

Forrás

idt EN ISO 21432:2020; idt ISO 21432:2019

Előd

Utód

Módosítás

SZK-közlemények

Kapcsolódó európai jogszabály

A szabvány

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