ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 5

Stress Correction for Removal of Material in X-Ray Stress Determination

Kang, ZQ
State Key Laboratory for Fatigue and Failure of Materials, Institute of Metal Research, Academia Sinica, Shenyang,

Li, JB
State Key Laboratory for Fatigue and Failure of Materials, Institute of Metal Research, Academia Sinica, Shenyang,

Wang, ZG
State Key Laboratory for Fatigue and Failure of Materials, Institute of Metal Research, Academia Sinica, Shenyang,

(Received 8 March 1993; accepted 16 October 1993)

Abstract

To determine residual stresses in a (flat) plate or bar with a rectangular cross-section by X-ray diffraction after removal of material, we can sectionally approximate the measured stress curve with depth using power series, then consequently evaluate the additional stresses created by removal, and finally obtain the true stress distribution with depth before the layers were removed. Formulas to evaluate corrections for stress have been derived. Two examples demonstrate that power series with few terms can provide us with an approximation good enough for the measured stress curve, and that the influence of the approximation on the corrective result is far less than that of the errors arising from the X-ray stress determination itself.

Keywords:
X-ray stress determination, stress correction, approximation, power series, single-side removal, double-side removal, shot peening

Paper ID: JTE11814J
DOI: 10.1520/JTE11814J
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