Prediction of hardness minimum locations during natural aging in an aluminum alloy 6061-T6 friction stir weld

W Woo; H Choo; P J Withers; Z Feng

doi:10.1007/s10853-009-3868-y

Prediction of hardness minimum locations during natural aging in an aluminum alloy 6061-T6 friction stir weld

W Woo, H Choo, P J Withers, Z Feng

Research output: Contribution to journal › Article › peer-review

Abstract

This study describes a method that can predict the hardness minimum location as a function of natural aging time in a heat-treatable 6061-T6 Al alloy plate subjected to friction stir welding (FSW). First, temperature distributions were simulated in the FSW plate by finite element modeling. Second, to determine the natural aging kinetics, hardness changes were measured as a function of natural aging time from a number of Al specimens that had been isothermally heat treated at different peak temperatures. Finally, the simulated temperature profiles and the natural aging kinetics were correlated to predict the hardness profiles in the FSW plate. The predicted hardness minimum locations are consistent with the measured hardness profiles in that the hardness moves away from the weld centerline as the aging time increases. Moreover, the predicted hardness minimum is located at the similar position of failure in cross-weld tensile samples.

Original language	English
Pages (from-to)	6302-6309
Number of pages	8
Journal	Journal of Materials Science
Volume	44
Issue number	23
DOIs	https://doi.org/10.1007/s10853-009-3868-y
Publication status	Published - 2009

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title = "Prediction of hardness minimum locations during natural aging in an aluminum alloy 6061-T6 friction stir weld",

abstract = "This study describes a method that can predict the hardness minimum location as a function of natural aging time in a heat-treatable 6061-T6 Al alloy plate subjected to friction stir welding (FSW). First, temperature distributions were simulated in the FSW plate by finite element modeling. Second, to determine the natural aging kinetics, hardness changes were measured as a function of natural aging time from a number of Al specimens that had been isothermally heat treated at different peak temperatures. Finally, the simulated temperature profiles and the natural aging kinetics were correlated to predict the hardness profiles in the FSW plate. The predicted hardness minimum locations are consistent with the measured hardness profiles in that the hardness moves away from the weld centerline as the aging time increases. Moreover, the predicted hardness minimum is located at the similar position of failure in cross-weld tensile samples.",

author = "W Woo and H Choo and Withers, {P J} and Z Feng",

note = "Woo, W. Choo, H. Withers, P. J. Feng, Z.",

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T1 - Prediction of hardness minimum locations during natural aging in an aluminum alloy 6061-T6 friction stir weld

AU - Woo, W

AU - Choo, H

AU - Withers, P J

AU - Feng, Z

N1 - Woo, W. Choo, H. Withers, P. J. Feng, Z.

PY - 2009

Y1 - 2009

N2 - This study describes a method that can predict the hardness minimum location as a function of natural aging time in a heat-treatable 6061-T6 Al alloy plate subjected to friction stir welding (FSW). First, temperature distributions were simulated in the FSW plate by finite element modeling. Second, to determine the natural aging kinetics, hardness changes were measured as a function of natural aging time from a number of Al specimens that had been isothermally heat treated at different peak temperatures. Finally, the simulated temperature profiles and the natural aging kinetics were correlated to predict the hardness profiles in the FSW plate. The predicted hardness minimum locations are consistent with the measured hardness profiles in that the hardness moves away from the weld centerline as the aging time increases. Moreover, the predicted hardness minimum is located at the similar position of failure in cross-weld tensile samples.

AB - This study describes a method that can predict the hardness minimum location as a function of natural aging time in a heat-treatable 6061-T6 Al alloy plate subjected to friction stir welding (FSW). First, temperature distributions were simulated in the FSW plate by finite element modeling. Second, to determine the natural aging kinetics, hardness changes were measured as a function of natural aging time from a number of Al specimens that had been isothermally heat treated at different peak temperatures. Finally, the simulated temperature profiles and the natural aging kinetics were correlated to predict the hardness profiles in the FSW plate. The predicted hardness minimum locations are consistent with the measured hardness profiles in that the hardness moves away from the weld centerline as the aging time increases. Moreover, the predicted hardness minimum is located at the similar position of failure in cross-weld tensile samples.

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DO - 10.1007/s10853-009-3868-y

M3 - Article

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SP - 6302

EP - 6309

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 23

ER -

Prediction of hardness minimum locations during natural aging in an aluminum alloy 6061-T6 friction stir weld

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