The microstructural evolution of friction stir welded AA6082-T6 aluminum alloy during cyclic deformation

A. S. Hamada; A. Järvenpää; M. M.Z. Ahmed; M. Jaskari; B. P. Wynne; D. A. Porter; L. P. Karjalainen

doi:10.1016/j.msea.2015.06.100

The microstructural evolution of friction stir welded AA6082-T6 aluminum alloy during cyclic deformation

A. S. Hamada, A. Järvenpää, M. M.Z. Ahmed, M. Jaskari, B. P. Wynne, D. A. Porter, L. P. Karjalainen

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

43 Scopus citations

Abstract

The fatigue behavior of a thick section friction stir welded AA6082-T6 aluminum alloy was studied to compare damage mechanisms in the weld zone and the base metal. Fully reversed tension-compression strain-controlled fatigue tests were conducted to determine the cyclic stress response and stored energy to failure. Microstructure evolution during cyclic straining was followed using secondary electron imaging and electron backscatter diffraction in a scanning electron microscope. Fatigue cracking along grain boundaries and the formation of slip bands were observed to be the fatigue-induced microstructural features in the friction-stir-welded structure. In the base metal, micron-sized particles led to particle-induced cracking.

Original language	English
Pages (from-to)	366-376
Number of pages	11
Journal	Materials Science and Engineering: A
Volume	642
DOIs	https://doi.org/10.1016/j.msea.2015.06.100
State	Published - 6 Aug 2015
Externally published	Yes

Keywords

Aluminum alloys
Cyclic deformation
Fatigue
Friction stir welding
Grain boundary cracking

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10.1016/j.msea.2015.06.100

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title = "The microstructural evolution of friction stir welded AA6082-T6 aluminum alloy during cyclic deformation",

abstract = "The fatigue behavior of a thick section friction stir welded AA6082-T6 aluminum alloy was studied to compare damage mechanisms in the weld zone and the base metal. Fully reversed tension-compression strain-controlled fatigue tests were conducted to determine the cyclic stress response and stored energy to failure. Microstructure evolution during cyclic straining was followed using secondary electron imaging and electron backscatter diffraction in a scanning electron microscope. Fatigue cracking along grain boundaries and the formation of slip bands were observed to be the fatigue-induced microstructural features in the friction-stir-welded structure. In the base metal, micron-sized particles led to particle-induced cracking.",

keywords = "Aluminum alloys, Cyclic deformation, Fatigue, Friction stir welding, Grain boundary cracking",

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doi = "10.1016/j.msea.2015.06.100",

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AU - Hamada, A. S.

AU - Järvenpää, A.

AU - Ahmed, M. M.Z.

AU - Jaskari, M.

AU - Wynne, B. P.

AU - Porter, D. A.

AU - Karjalainen, L. P.

PY - 2015/8/6

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N2 - The fatigue behavior of a thick section friction stir welded AA6082-T6 aluminum alloy was studied to compare damage mechanisms in the weld zone and the base metal. Fully reversed tension-compression strain-controlled fatigue tests were conducted to determine the cyclic stress response and stored energy to failure. Microstructure evolution during cyclic straining was followed using secondary electron imaging and electron backscatter diffraction in a scanning electron microscope. Fatigue cracking along grain boundaries and the formation of slip bands were observed to be the fatigue-induced microstructural features in the friction-stir-welded structure. In the base metal, micron-sized particles led to particle-induced cracking.

AB - The fatigue behavior of a thick section friction stir welded AA6082-T6 aluminum alloy was studied to compare damage mechanisms in the weld zone and the base metal. Fully reversed tension-compression strain-controlled fatigue tests were conducted to determine the cyclic stress response and stored energy to failure. Microstructure evolution during cyclic straining was followed using secondary electron imaging and electron backscatter diffraction in a scanning electron microscope. Fatigue cracking along grain boundaries and the formation of slip bands were observed to be the fatigue-induced microstructural features in the friction-stir-welded structure. In the base metal, micron-sized particles led to particle-induced cracking.

KW - Aluminum alloys

KW - Cyclic deformation

KW - Fatigue

KW - Friction stir welding

KW - Grain boundary cracking

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The microstructural evolution of friction stir welded AA6082-T6 aluminum alloy during cyclic deformation

Abstract

Keywords

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