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Grain refinement of Ti-15V-3Cr-3Sn-3Al metastable β titanium alloy welds using boron-modified fillers
Published in Elsevier Ltd
2018
Volume: 749
   
Pages: 320 - 328
Abstract
Metastable beta (β) titanium alloy welds typically exhibit low strength and hardness due to their coarse fusion zone (FZ) microstructure. Efforts to improve the mechanical properties of these alloys have been confined to the use of various heat treatment processes as the means to promote α precipitation in the β matrix. The present study employs a novel method of using boron-added commercial pure-Ti fillers in gas tungsten arc welding (GTAW) of the Ti-15V-3Cr-3Sn-3Al metastable β titanium alloy. Microstructural analysis of boron-added welds showed refined prior-β grains and equiaxed dendritic grains with nonlinear grain boundaries. The formation of TiB and consequent microstructural modification of the FZ in the welds prepared using 0.5 wt% boron-added CP-Ti filler contribute to the improvement in the mechanical properties. © 2018
About the journal
JournalData powered by TypesetJournal of Alloys and Compounds
PublisherData powered by TypesetElsevier Ltd
ISSN09258388
Open AccessNo
Concepts (25)
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    Aluminum alloys
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    Boron
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    Chromium alloys
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    Fillers
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    Gas metal arc welding
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    Gas welding
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    Grain boundaries
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    Grain refinement
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    Grain size and shape
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    Mechanical properties
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    Microstructure
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    Precipitation (chemical)
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    Tin alloys
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    Titanium alloys
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    Welding
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    Welds
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    DENDRITIC GRAINS
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    Gas tungsten arc welding
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    HEAT TREATMENT PROCESS
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    METASTABLE BETA-TITANIUM ALLOYS
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    Microstructural analysis
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    MICROSTRUCTURAL MODIFICATION
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    TI-15-3
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    TI-15V-3CR-3SN-3AL
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    Phosphorus compounds