Influence of laser welding heat input on HAZ cracking in newly developed Haynes 282 superalloy
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Date
2012
Authors
Osoba, L.O.
Ojo, O.A.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Materials, Minerals and Mining
Abstract
A study of the cause of heat affected zone (HAZ) cracking and its dependence on heat input
during laser beam welding of a newly developed c9 precipitation strengthened nickel based
superalloy Haynes 282 was performed. Careful microstructural study coupled with Gleeble
thermomechanical simulation showed that HAZ cracking in the alloy is attributable to the
degradation of hot ductility of the alloy due to subsolidus grain boundary liquation. A decrease in
the magnitude of heat input during laser beam welding resulted in increased HAZ cracking. The
cracking variation with heat input is discussed in relation to the time that the subsolidus HAZ
region spent at peak temperatures and thermally generated stress during welding.
Description
Keywords
Joining, Welding, Nickel based superalloy, Heat Affected Zone Cracking
Citation
Osoba, L.O. Ojo, O.A. (2012). Influence of laser welding heat input on HAZ cracking in newly developed Haynes 282 superalloy. Materials Science and Technology; 28(4): 431-436