Effect of friction stir welding speed on mechanical properties and microstructure of nickel based super alloy Inconel 718

M. M.Z. Ahmed; B. P. Wynne; J. P. Martin

doi:10.1179/1362171813Y.0000000156

Effect of friction stir welding speed on mechanical properties and microstructure of nickel based super alloy Inconel 718

M. M.Z. Ahmed, B. P. Wynne, J. P. Martin

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

43 Scopus citations

Abstract

In this study, 4 mm thick nickel based super alloy Inconel 718 has been friction stir welded using different traverse speeds of 30, 50 and 80 mm min^-1 at a rotation rate of 400 rev min^-1. Since the Inconel 718 alloy was friction stir welded in the annealed condition, a significant increase in mechanical properties has occurred. Microstructural evolution in the nugget (NG) zone has been investigated using electron back scattering diffraction (EBSD) at the top surface and near the base of the NG as well as across the transverse cross-section. Low resolution EBSD scan across the NG to the base material showed great reduction in grain size from the base material to the NG region. High resolution EBSD scans showed that the NG region is dominated by dynamically recrystallised grain structure with very fine grains that was varied in size from the top to the base of the NG.

Original language	English
Pages (from-to)	680-687
Number of pages	8
Journal	Science and Technology of Welding and Joining
Volume	18
Issue number	8
DOIs	https://doi.org/10.1179/1362171813Y.0000000156
State	Published - Nov 2013
Externally published	Yes

Keywords

Crystallographic texture
Electron back scattering diffraction
Friction stir welding
Grain size
Inconel 718
Nickel based super alloy

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10.1179/1362171813Y.0000000156

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title = "Effect of friction stir welding speed on mechanical properties and microstructure of nickel based super alloy Inconel 718",

abstract = "In this study, 4 mm thick nickel based super alloy Inconel 718 has been friction stir welded using different traverse speeds of 30, 50 and 80 mm min-1 at a rotation rate of 400 rev min-1. Since the Inconel 718 alloy was friction stir welded in the annealed condition, a significant increase in mechanical properties has occurred. Microstructural evolution in the nugget (NG) zone has been investigated using electron back scattering diffraction (EBSD) at the top surface and near the base of the NG as well as across the transverse cross-section. Low resolution EBSD scan across the NG to the base material showed great reduction in grain size from the base material to the NG region. High resolution EBSD scans showed that the NG region is dominated by dynamically recrystallised grain structure with very fine grains that was varied in size from the top to the base of the NG.",

keywords = "Crystallographic texture, Electron back scattering diffraction, Friction stir welding, Grain size, Inconel 718, Nickel based super alloy",

author = "Ahmed, \{M. M.Z.\} and Wynne, \{B. P.\} and Martin, \{J. P.\}",

year = "2013",

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T1 - Effect of friction stir welding speed on mechanical properties and microstructure of nickel based super alloy Inconel 718

AU - Ahmed, M. M.Z.

AU - Wynne, B. P.

AU - Martin, J. P.

PY - 2013/11

Y1 - 2013/11

N2 - In this study, 4 mm thick nickel based super alloy Inconel 718 has been friction stir welded using different traverse speeds of 30, 50 and 80 mm min-1 at a rotation rate of 400 rev min-1. Since the Inconel 718 alloy was friction stir welded in the annealed condition, a significant increase in mechanical properties has occurred. Microstructural evolution in the nugget (NG) zone has been investigated using electron back scattering diffraction (EBSD) at the top surface and near the base of the NG as well as across the transverse cross-section. Low resolution EBSD scan across the NG to the base material showed great reduction in grain size from the base material to the NG region. High resolution EBSD scans showed that the NG region is dominated by dynamically recrystallised grain structure with very fine grains that was varied in size from the top to the base of the NG.

AB - In this study, 4 mm thick nickel based super alloy Inconel 718 has been friction stir welded using different traverse speeds of 30, 50 and 80 mm min-1 at a rotation rate of 400 rev min-1. Since the Inconel 718 alloy was friction stir welded in the annealed condition, a significant increase in mechanical properties has occurred. Microstructural evolution in the nugget (NG) zone has been investigated using electron back scattering diffraction (EBSD) at the top surface and near the base of the NG as well as across the transverse cross-section. Low resolution EBSD scan across the NG to the base material showed great reduction in grain size from the base material to the NG region. High resolution EBSD scans showed that the NG region is dominated by dynamically recrystallised grain structure with very fine grains that was varied in size from the top to the base of the NG.

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KW - Electron back scattering diffraction

KW - Friction stir welding

KW - Grain size

KW - Inconel 718

KW - Nickel based super alloy

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Effect of friction stir welding speed on mechanical properties and microstructure of nickel based super alloy Inconel 718

Abstract

Keywords

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