Grain structure and dislocation density measurements in a friction-stir welded aluminum alloy using X-ray peak profile analysis

Wanchuck Woo; Levente Balogh; Tamás Ungár; Hahn Choo; Zhili Feng

doi:10.1016/j.msea.2008.08.007

Grain structure and dislocation density measurements in a friction-stir welded aluminum alloy using X-ray peak profile analysis

Wanchuck Woo, Levente Balogh, Tamás Ungár, Hahn Choo, Zhili Feng

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Abstract

The dislocation density and grain structure of a friction-stir welded 6061-T6 aluminum alloy were determined as a function of distance from the weld centerline using high-resolution micro-beam X-ray diffraction. The results of the X-ray peak profile analysis show that the dislocation density is about 1.2 × 10¹⁴ m^-2 inside and 4.8 × 10¹⁴ m^-2 outside of the weld region. The average subgrain size is about 180 nm in both regions. Compared to the base material, the dislocation density was significantly decreased in the dynamic recrystallized zone of the friction-stir welds, which is in good correlation with the TEM observations. The influence of the dislocation density on the strain hardening behavior during tensile deformation is also discussed.

Original language	English
Pages (from-to)	308-313
Number of pages	6
Journal	Materials Science and Engineering: A
Volume	498
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2008.08.007
State	Published - Dec 20 2008

Keywords

Aluminum alloy
Dislocation density
Friction-stir welding
Grain size
Strain hardening
X-ray diffraction

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10.1016/j.msea.2008.08.007

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title = "Grain structure and dislocation density measurements in a friction-stir welded aluminum alloy using X-ray peak profile analysis",

abstract = "The dislocation density and grain structure of a friction-stir welded 6061-T6 aluminum alloy were determined as a function of distance from the weld centerline using high-resolution micro-beam X-ray diffraction. The results of the X-ray peak profile analysis show that the dislocation density is about 1.2 × 1014 m-2 inside and 4.8 × 1014 m-2 outside of the weld region. The average subgrain size is about 180 nm in both regions. Compared to the base material, the dislocation density was significantly decreased in the dynamic recrystallized zone of the friction-stir welds, which is in good correlation with the TEM observations. The influence of the dislocation density on the strain hardening behavior during tensile deformation is also discussed.",

keywords = "Aluminum alloy, Dislocation density, Friction-stir welding, Grain size, Strain hardening, X-ray diffraction",

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T1 - Grain structure and dislocation density measurements in a friction-stir welded aluminum alloy using X-ray peak profile analysis

AU - Woo, Wanchuck

AU - Balogh, Levente

AU - Ungár, Tamás

AU - Choo, Hahn

AU - Feng, Zhili

PY - 2008/12/20

Y1 - 2008/12/20

N2 - The dislocation density and grain structure of a friction-stir welded 6061-T6 aluminum alloy were determined as a function of distance from the weld centerline using high-resolution micro-beam X-ray diffraction. The results of the X-ray peak profile analysis show that the dislocation density is about 1.2 × 1014 m-2 inside and 4.8 × 1014 m-2 outside of the weld region. The average subgrain size is about 180 nm in both regions. Compared to the base material, the dislocation density was significantly decreased in the dynamic recrystallized zone of the friction-stir welds, which is in good correlation with the TEM observations. The influence of the dislocation density on the strain hardening behavior during tensile deformation is also discussed.

AB - The dislocation density and grain structure of a friction-stir welded 6061-T6 aluminum alloy were determined as a function of distance from the weld centerline using high-resolution micro-beam X-ray diffraction. The results of the X-ray peak profile analysis show that the dislocation density is about 1.2 × 1014 m-2 inside and 4.8 × 1014 m-2 outside of the weld region. The average subgrain size is about 180 nm in both regions. Compared to the base material, the dislocation density was significantly decreased in the dynamic recrystallized zone of the friction-stir welds, which is in good correlation with the TEM observations. The influence of the dislocation density on the strain hardening behavior during tensile deformation is also discussed.

KW - Aluminum alloy

KW - Dislocation density

KW - Friction-stir welding

KW - Grain size

KW - Strain hardening

KW - X-ray diffraction

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U2 - 10.1016/j.msea.2008.08.007

DO - 10.1016/j.msea.2008.08.007

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ER -

Grain structure and dislocation density measurements in a friction-stir welded aluminum alloy using X-ray peak profile analysis

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Keywords

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