Effect of magnetic stirring on grain structure refinement: Part 1 - Autogenous nickel alloy welds

Y. C. Lim; X. Yu; J. H. Cho; J. Sosa; D. F. Farson; S. S. Babu; S. McCracken; B. Flesner

doi:10.1179/136217110X12720264008277

Effect of magnetic stirring on grain structure refinement: Part 1 - Autogenous nickel alloy welds

Y. C. Lim, X. Yu, J. H. Cho, J. Sosa, D. F. Farson, S. S. Babu, S. McCracken, B. Flesner

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

45 Citations (Scopus)

Abstract

The objectives of this work were to characterise and understand the effects of circular magnetic arc deflection (arc stirring) on grain structure refinement of gas tungsten arc weld beads made in Inconel 690 substrates. Welds were made at various arc stirring frequencies (1·5-50 Hz), and microstructures were analysed using optical and electron backscattered diffraction microscopy. Optimum refinement of grain size occurred at a stirring frequency of ∼7 Hz. Analysis of computational fluid flow, heat transfer and solidification model results suggested that grain detachment was the primary mechanism for grain refinement.

Original language	English
Pages (from-to)	583-589
Number of pages	7
Journal	Science and Technology of Welding and Joining
Volume	15
Issue number	7
DOIs	https://doi.org/10.1179/136217110X12720264008277
Publication status	Published - 1 Oct 2010
Externally published	Yes

Keywords

Grain boundaries-grain boundary structure
Grain refining
Joining-welding
Misorientation
Simulation

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10.1179/136217110X12720264008277

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title = "Effect of magnetic stirring on grain structure refinement: Part 1 - Autogenous nickel alloy welds",

abstract = "The objectives of this work were to characterise and understand the effects of circular magnetic arc deflection (arc stirring) on grain structure refinement of gas tungsten arc weld beads made in Inconel 690 substrates. Welds were made at various arc stirring frequencies (1·5-50 Hz), and microstructures were analysed using optical and electron backscattered diffraction microscopy. Optimum refinement of grain size occurred at a stirring frequency of ∼7 Hz. Analysis of computational fluid flow, heat transfer and solidification model results suggested that grain detachment was the primary mechanism for grain refinement.",

keywords = "Grain boundaries-grain boundary structure, Grain refining, Joining-welding, Misorientation, Simulation",

author = "Lim, {Y. C.} and X. Yu and Cho, {J. H.} and J. Sosa and Farson, {D. F.} and Babu, {S. S.} and S. McCracken and B. Flesner",

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TY - JOUR

T1 - Effect of magnetic stirring on grain structure refinement

T2 - Part 1 - Autogenous nickel alloy welds

AU - Lim, Y. C.

AU - Yu, X.

AU - Cho, J. H.

AU - Sosa, J.

AU - Farson, D. F.

AU - Babu, S. S.

AU - McCracken, S.

AU - Flesner, B.

PY - 2010/10/1

Y1 - 2010/10/1

N2 - The objectives of this work were to characterise and understand the effects of circular magnetic arc deflection (arc stirring) on grain structure refinement of gas tungsten arc weld beads made in Inconel 690 substrates. Welds were made at various arc stirring frequencies (1·5-50 Hz), and microstructures were analysed using optical and electron backscattered diffraction microscopy. Optimum refinement of grain size occurred at a stirring frequency of ∼7 Hz. Analysis of computational fluid flow, heat transfer and solidification model results suggested that grain detachment was the primary mechanism for grain refinement.

AB - The objectives of this work were to characterise and understand the effects of circular magnetic arc deflection (arc stirring) on grain structure refinement of gas tungsten arc weld beads made in Inconel 690 substrates. Welds were made at various arc stirring frequencies (1·5-50 Hz), and microstructures were analysed using optical and electron backscattered diffraction microscopy. Optimum refinement of grain size occurred at a stirring frequency of ∼7 Hz. Analysis of computational fluid flow, heat transfer and solidification model results suggested that grain detachment was the primary mechanism for grain refinement.

KW - Grain boundaries-grain boundary structure

KW - Grain refining

KW - Joining-welding

KW - Misorientation

KW - Simulation

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M3 - Article

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JO - Science and Technology of Welding and Joining

JF - Science and Technology of Welding and Joining

IS - 7

ER -

Effect of magnetic stirring on grain structure refinement: Part 1 - Autogenous nickel alloy welds

Abstract

Keywords

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