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High temperature mechanical properties of Inconel 718 pulsed Nd - YAG laser welds
Published in
2006
Volume: 23
   
Issue: 1
Pages: 29 - 37
Abstract
Bead-on-plate full-penetration pulsed Nd - YAG laser welds were produced in 2mm thick sheets of Inconel 718 and were subjected to aging treatment with and without post-weld solution treatment at 980° C. Weld microstructures, high temperature tensile and stress rupture properties were evaluated. The tensile and stress rupture properties of the welds after post-weld aging treatment were found to be inferior in relation to the base metal due to the presence of Nb-rich brittle intermetallic Laves phase in weld microstructure; however, the weld properties were found to satisfy the minimum property requirements generally specified for alloy 718 sheet products (AMS 5596). Post-weld solution treatment at 980°C was found to result in considerable Laves dissolution and reduction in Nb segregation, leading to improvement in weld properties, although not to the level of base metal. © 2006 Science Reviews.
About the journal
JournalMaterials at High Temperatures
ISSN09603409
Open AccessNo
Concepts (12)
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    Inconel 718
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    LAVES DISSOLUTION
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    Laves phase
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    NB SEGREGATION
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    Aging of materials
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    High temperature applications
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    INTERMETALLICS
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    Laser beam welding
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    Mechanical properties
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    Microstructure
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    Tensile stress
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    Neodymium lasers