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- W1987467554 abstract "Nanoindentation is a good method for characterizing residual stresses with large gradient that distributed in a very confined area. In our previous research, a formula was brought out to characterize residual stresses from elastic modulus measured in nanoindentation experiments. In this paper, aluminum alloy bulks were used as samples to validate the formula. The bulks were machined to be mirror surface on one side through ultra-precision diamond turning. Two samples were compressed and stretched by load instruments respectively. Nanomechanical properties such as elastic modulus in the areas on the mirror surface of the compressed and stretched samples were both measured by a commercial nanomechanical test system (TriboIndenter, Hysitron Inc.). Using the formula, then, the mean values of residual stresses on the mirror surface were calculated through the acquired experiment data. After that, the two stressed samples were tested by a commercial XRD instrument (X'Pert, Philips Inc.). Comparing the residual stresses that obtained through nanoindentation and XRD methods, their difference was no more than 10.5%, which showed that the formula is suitable for characterizing residual stresses in materials even it has high plasticity. Thus, the formula was validated." @default.
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- W1987467554 date "2009-07-25" @default.
- W1987467554 modified "2023-09-26" @default.
- W1987467554 title "A method of calculating residual stresses through elastic modulus measured by nanoindentation" @default.
- W1987467554 doi "https://doi.org/10.1117/12.840358" @default.
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