ISO_TTA 3-2001 多晶材料 中子衍射法测定剩余应力.pdf

标准号：ISO/TTA 3-2001
实施状态：现行
中文名称：多晶材料  中子衍射法测定剩余应力
英文名称：Polycrystalline materials - Determination of residual stresses by neutron diffraction
发布日期：2001-09-15
采用标准：NPR-ISO/TTA 3-2002 en-2002,IDT
起草单位：VAM
标准简介：This Technology Trends Assessment specifies a test method for determining residual
stresses in polycrystalline materials by neutron diffraction. It may be applied to
homogeneous and inhomogeneous materials and to test pieces containing distinct
phases.
The principles of the neutron diffraction technique are outlined. Advice is provided
on the crystalline planes on which measurements should be made for different
categories of materials. Guidance is provided about the directions in which the
measurements should be obtained and of the volume of material which should be
examined, in relation to material grain size and the stress state envisaged, when
making measurements.
Procedures are described for accurately positioning and aligning test pieces in a
neutron beam and for precisely defining the volume of material that is sampled when
individual measurements are being made.
The precautions needed for calibrating the neutron diffraction facilities are described.
Techniques for obtaining a stress-free reference are presented.
The methods of determining individual elastic strains 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 (or applied) stress from the strain data and of how to estimate the
uncertainty in the results.
文件格式：PDF
文件大小：2.69MB
文件页数：61
（以上信息更新时间为：2019-11-23）



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