Effect of preferred orientation on x-ray stress measurement in NS.5 aluminium alloy

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Abstract
This paper describes an investigation into the effect of preferred orientation on X-ray stress measurements in NS.5 aluminium-alloy sheet. When the sin2 ψ technique (1)∗ of X-ray stress measurement is applied to practical engineering problems it is necessary that the correct values of the elastic constants of the material be used to calculate the X-ray stress values. In this investigation, the X-ray values of Young's modulus E and Poisson's ratio v were found to vary significantly with the direction of stress measurement relative to the rolling direction of the sheet.

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