A method for determining X-ray elastic constants for the measurement of residual stress

被引：8

作者：

Munsi, ASMY ^{[1
]}

Waddell, AJ ^{[1
]}

Walker, CA ^{[1
]}

机构：

[1] Univ Strathclyde, Dept Mech Engn, Glasgow, Lanark, Scotland

来源：

STRAIN | 2003年 / 39卷 / 01期

关键词：

residual stress; calibration; X-ray diffraction analysis; X-ray elastic constant; vibratory stress relief;

D O I：

10.1046/j.1475-1305.2003.00044.x

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The X-ray diffraction method is arguably the most convenient method of measuring residual stresses in terms of cost, spatial resolution, measurement time and the accuracy of measurement. The normal methods for calibrating X-ray diffractometers are not conveniently applied to automated scanning systems, however, and so a new approach is required. In this study, a scanning X-ray diffractometer was calibrated and the X-ray elastic constant for a steel alloy was determined using a customised four-point bending rig. The bending rig, in turn, was calibrated by dead loading. This study also described a simple alternative method for determining the X-ray elastic constant, without the use of specialised software. After calibration, the error band of the diffractometer was found to be less than 10 M Pa. As this is 5% of the yield stress for a typical steel, this level of accuracy was deemed to be acceptable for the measurement of residual stress.

引用

页码：3 / 10

页数：8