A Useful Guide for X-Ray Stress Evaluation (XSE)

Hauk, Viktor; Macherauch, Eckard

doi:10.1007/978-1-4613-2775-2_13

Cited by 64 publications

(29 citation statements)

References 2 publications

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“…[12] The elastic constants were taken from literature for the 422 planes. [13] A total of 18 measurements were made on each forging, some measurements being repeated to assess the experimental uncertainties. The average of these repeated measurements is reported.…”

Section: X-ray Diffractionmentioning

confidence: 99%

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

Robinson

Tanner

Truman

et al. 2012

Materials Characterization

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The most critical stage in the heat treatment of high strength aluminium alloys is the rapid cooling necessary to form a supersaturated solid solution. A disadvantage of quenching is that the thermal gradients can be sufficient to cause inhomogeneous plastic deformation which in turn leads to the development of large residual stresses. Two 215 mm thick rectilinear forgings have been made from 7000 series alloys with widely different quench sensitivity to determine if solute loss in the form of precipitation during quenching can significantly affect residual stress magnitudes. The forgings were heat treated and immersion quenched using cold water to produce large magnitude residual stresses. The through thickness residual stresses were measured by neutron diffraction and incremental deep hole drilling. The distribution of residual stresses was found to be similar for both alloys varying from highly triaxial and tensile in the interior, to a state of biaxial compression in the surface. The 7010 forging exhibited larger tensile stresses in the interior. The microstructural variation from surface to centre for both forgings was determined using optical and transmission electron microscopy. These observations were used to confirm the origin of the hardness variation measured through the forging thickness. When the microstructural changes were accounted for in the through thickness lattice parameter, the residual stresses in the two forgings were found to be very similar. Solute loss in the 7075 forging appeared to have no significant effect on the residual stress magnitudes when compared to 7010.

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Section: X-ray Diffractionmentioning

confidence: 99%

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

Robinson

Tanner

Truman

et al. 2012

Materials Characterization

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“…The 'sin 2 ~b method' (Hauk, 1955;Macherauch & Miiller, 1961;D611e & Hauk, 1977;D611e, 1979;James & Cohen, 1980;Hauk, 1984;Hauk & Macherauch, 1984) is used to determine (residual) stresses from diffraction data. The measured diffraction line-shift strain often exhibits straight-line behaviour when plotted vs sin 2 ~p.…”

Section: Introductionmentioning

confidence: 99%

Non-linear diffraction strainvssin²ψ phenomena in specimens exhibiting rolling-type texture

Brakman¹,

Penning²

1988

Acta Cryst Sect A

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Non-linearities in measured diffraction strains are frequently observed in textured materials. For the case of textured cold-rolled low-carbon steel sheet specimens the diffraction strain is analysed in its constituents: single-crystallite strain and the orientation distribution function of the crystallites. With only macro-stresses 0.~ and 0"2 taken into account, a satisfactory explanation of practical measurements on these steel specimens is obtained.

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“…Hauk recommends [29] for a good alignment of diffractometer in the complete range of c that the peak positions of the {hkl}-lines of the calibration powder should not differ by more than + 6 0.01°in 2q scale. However, in our laboratories an internal procedure is used which states for the determination of residual stress by X-ray diffraction that the peak displacement of a powder without stresses must not exceed 0.02°in the 2q scale.…”

Section: Resultsmentioning

confidence: 99%

A methodology development for the study of near surface stress gradients

Marques

Dias

Gergaud

et al. 2000

Materials Science and Engineering: A

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A modification of the geometry used in the sin 2 technique of X-ray diffraction is described. A modified equation for residual stress determination, including geometric adapted F ij , is presented. This method allows near surface stress gradients determination and is called pseudo-grazing incidence method. The limits of the new technique were first tested on different powder materials with X-ray radiation produced by conventional tubes and by a synchrotron radiation source. The technique was finally applied for the determination of a residual stress profile in a polished molybdenum surface before and after the deposition of a PVD chromium film.

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A Useful Guide for X-Ray Stress Evaluation (XSE)

Cited by 64 publications

References 2 publications

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

Non-linear diffraction strainvssin²ψ phenomena in specimens exhibiting rolling-type texture

A methodology development for the study of near surface stress gradients

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A Useful Guide for X-Ray Stress Evaluation (XSE)

Cited by 64 publications

References 2 publications

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

The influence of quench sensitivity on residual stresses in the aluminium alloys 7010 and 7075

Non-linear diffraction strainvssin2ψ phenomena in specimens exhibiting rolling-type texture

A methodology development for the study of near surface stress gradients

Contact Info

Product

Resources

About

Non-linear diffraction strainvssin²ψ phenomena in specimens exhibiting rolling-type texture