Evaluation of Die Chilling Effects during Forging of Nimonic-80A Superalloy

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3457648· OSTI ID:21366803

Shahriari, D ^[1]; Sadeghi, M H; Amiri, A ^[2]; Cheraghzadeh, M ^[1]

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1. Mapna Group, Mavadkaran Eng. Co., R and D Dept., Tehran (Iran, Islamic Republic of)
2. Manufacturing Group, Mechanical Engineering Department, Faculty of Engineering, Tarbiat Modares University, Tehran (Iran, Islamic Republic of)

Nimonic-80A is a kind of nickel-based superalloys which is used in high temperature components of land gas turbines. In this paper, the influence of four design factors: die temperature, strain rate, friction coefficient and geometry size of ring sample over the variation of internal diameters (VID) and forging load (FL) was studied. It was done by means of design methodology based on DOE-designated full factorial and FE simulations. FEM and experimental results showed that the variation of internal diameters and forging load had inverse proportion to the die temperature. Regression models were developed by using the response surface methodology (RSM) for VID and FL. Rate of the dynamic recrystallization varied depending on different amounts of die temperature. The results can be used in the semi-isothermal forging of complex part of the Nimonic-80A.

• OSTI ID: 21366803
• Journal Information: AIP Conference Proceedings, Vol. 1252, Issue 1; Conference: NUMIFORM 2010: 10. international conference on numerical methods in industrial forming processes dedicated to Professor O. C. Zienkiewicz (1921-2009), Pohang (Korea, Republic of), 13-17 Jun 2010; Other Information: DOI: 10.1063/1.3457648; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DIES
EVALUATION
FORGING
FRICTION
FRICTION FACTOR
GAS TURBINES
GEOMETRY
NICKEL
NIMONIC 80A
RECRYSTALLIZATION
SIMULATION
STRAIN RATE
VARIATIONS
ALLOY-NI76CR20TI2
ALLOYS
ALUMINIUM ALLOYS
BORON ADDITIONS
BORON ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
DIMENSIONLESS NUMBERS
ELEMENTS
EQUIPMENT
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
MACHINERY
MATERIALS
MATERIALS WORKING
MATHEMATICS
METALS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIMONIC
TITANIUM ALLOYS
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS
TURBINES
TURBOMACHINERY
ZIRCONIUM ADDITIONS
ZIRCONIUM ALLOYS