Physical and Numerical Simulations Study of Heat Input Dependence of HAZ Cracking in Nickel Base Superalloy IN 718
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Date
2013
Authors
Osoba, L.O.
Gao, Z.
Ojo, O.A.
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Metallurgical Engineering (ME)
Abstract
Physical and numerical simulations study of heat input
dependence of cracking in the weld heat affected zone (HAZ)
in a nickel base superalloy, IN 718, was performed. Gleeble
thermo‐mechanical physical simulation showed that
increase in resistance to cracking with heat input is
associated with enhanced hot ductility of the alloy.
Numerical calculations by finite element analysis show that
in addition to the improved hot ductility, reduction in the
HAZ cracking with increase in heat input is also attributed
to a decrease in the gradient of the thermally generated
strain rate during weld cooling.
Description
Keywords
Superalloy; HAZ; Ductility; Welding
Citation
Osoba, L.O. Gao, Z. Ojo, O.A. (2013). Physical and Numerical Simulations Study of Heat Input Dependence of HAZ Cracking in Nickel Base Superalloy IN 718. Journal of Metallurgical Engineering (ME); 2(3): 88-93.