Crack growth behavior in ATI 718Plus® alloy

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Proceedings titleMaterials Science Forum
Conference7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011, 1 August 2011 through 5 August 2011, Quebec City, QC
Pages24282433; # of pages: 6
SubjectAlloy 718; ATI 718Plus; Cast and wrought; Crack growth behavior; Creep crack growth; Cyclic loading conditions; Engine disk; Ni-base alloys; Ni-base superalloys; Temperature range; Testing programs; Turbine disks; Turbine engine; Waspaloy; Cracks; Creep; Fatigue crack propagation; Fatigue testing; Gas turbines; Growth (materials); Mechanical properties; Software testing; Superalloys; Testing; Turbomachine blades; Alloys; Crack propagation; Nickel; Cerium alloys
AbstractATI 718Plus® alloy is a new, cast and wrought, Ni-base superalloy with a maximum use temperature approximately 55°C higher than alloy 718. The mechanical properties have been well characterized by turbine engine OEM's and the alloy has been specified for use as static components and blades in gas turbine engines. Broader use of ATI 718Plus alloy in engine disk applications requires detailed understanding of the damage tolerance under creep and cyclic loading conditions. The results of a large testing program to evaluate the crack growth behavior of ATI 718Plus alloy at temperatures between 649°C and 704°C under conditions of fatigue, dwell-fatigue, and creep are presented. Crack growth rates in ATI 718Plus alloy in this temperature range are lower than alloy 718 and comparable to Waspaloy under non-dwell-fatigue conditions, and comparable to alloy 720 in dwell-fatigue tests. © 2012 Trans Tech Publications, Switzerland.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace (AERO-AERO)
Peer reviewedYes
NPARC number21269404
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Record identifierc6dfcdb0-ff9f-4ed2-8ff5-6b38a9a7deae
Record created2013-12-12
Record modified2016-05-09
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