Journal ArticleDOI
Modeling microstructural development during the forging of Waspaloy
TLDR
In this article, a model for predicting the evolution of microstructure in Waspaloy during thermomechanical proc-essing was developed in terms of dynamic recrystallization (DRX), metadynamic recrystization, and grain growth phenomena.Abstract:
A model for predicting the evolution of microstructure in Waspaloy during thermomechanical proc-essing was developed in terms of dynamic recrystallization (DRX), metadynamic recrystallization, and grain growth phenomena. Three sets of experiments were conducted to develop the model: (1) preheating tests to model grain growth prior to hot deformation; (2) compression tests in a Gleeble testing machine with different deformation and cooling conditions to model DRX, metadynamic recrystallization, and short time grain growth during the post deformation dwell period and cooling; and (3) pancake and closed die forging tests conducted in a manufacturing environment to verify and refine the model. The microstructural model was combined with finite element modeling (FEM) to predict microstructure development during forging of Waspaloy. Model predictions showed good agreement with microstructures obtained in actual isothermal and hammer forgings carried out at a forging shop.read more
Citations
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Journal ArticleDOI
Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure and Properties
Tresa M. Pollock,Sammy Tin +1 more
TL;DR: The chemical, physical, and mechanical characteristics of nickel-based superalloys are reviewed with emphasis on the use of this class of materials within turbine engines as mentioned in this paper, and the role of major and minor alloying additions in multicomponent commercial cast and wrought super-alloys is discussed.
Journal ArticleDOI
Ni-Based Superalloys for Turbine Discs
David Furrer,Hans Fecht +1 more
TL;DR: In this article, the main applications for nickel-based superalloys are gas-turbine-engine disc components for land-based power generation and aircraft propulsion, and they have been developed for specific, specialized properties and applications.
Journal ArticleDOI
Deformation characteristics of isothermally forged UDIMET 720 nickel-base superalloy
TL;DR: In this article, the hot deformation behavior of nickel-base superalloy UDIMET 720 in solution-treated conditions, simulating the forging process of the alloy, was studied using hot compression experiments.
Journal ArticleDOI
Self-consistent modeling of the flow behavior of wrought alpha/beta titanium alloys under isothermal and nonisothermal hot-working conditions
TL;DR: In this article, a self-consistent model was applied to predict the plastic flow behavior during hot working of alpha/beta titanium alloys with wrought (equiaxed alpha) microstructures as a function of flow behavior and volume fractions of the individual phases.
Journal ArticleDOI
Prediction of machining induced microstructure in Ti–6Al–4V alloy using 3-D FE-based simulations: Effects of tool micro-geometry, coating and cutting conditions
Yiğit M. Arısoy,Tuğrul Özel +1 more
TL;DR: In this paper, the authors present experimental and numerical investigations in machining induced subsurface microstructure, microhardness and grain size in Ti-6Al-4V titanium alloy.
References
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Journal ArticleDOI
The kinetics of grain boundary nucleated reactions
TL;DR: In this paper, the authors derived rate laws for transformations in which the new phase nucleates on grain boundary surface, grain edges, or grain corners, and in which a new phase grows with constant radial velocity.