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Fusion zone grain refinement in aluminum alloy welds through magnetic arc oscillation and its effect on tensile behavior
R. Murugesan,
Published in ASM International, Materials Park
1999
Volume: 8
   
Issue: 5
Pages: 513 - 520
Abstract
Grain size reduction in weld fusion zones confers the advantages of an increased resistance to solidification cracking and an improvement in mechanical properties. Oscillation of the welding arc through an imposed alternating magnetic field is one of several approaches to modify weld solidification structures. In this study, gas tungsten arc welds were produced in two high strength, age hardenable aluminum alloys with and without an external magnetic field. Metallographic characterization revealed the degree of structural refinement produced by magnetic arc oscillation. The decrease in grain size was found to increase tensile elongation, while the effect on strength and age hardening response was only meager. The improvement in ductility was partially maintained in the peak aged condition also.
About the journal
JournalJournal of Materials Engineering and Performance
PublisherASM International, Materials Park
ISSN10599495
Open AccessNo
Concepts (14)
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    Age hardening
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    Crack initiation
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    Ductility
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    Fatigue of materials
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    Fracture toughness
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    Gas metal arc welding
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    Grain size and shape
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    Metallographic microstructure
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    Tensile strength
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    Welds
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    GAS TUNGSTEN ARC WELD
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    Grain refinement
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    WELD FUSION ZONE
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    Aluminum alloys