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2 edition of large deformation material model for a nickel-based superalloy in forging found in the catalog.

large deformation material model for a nickel-based superalloy in forging

S. K. Kapotas

large deformation material model for a nickel-based superalloy in forging

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Published by UMIST in Manchester .
Written in English


Edition Notes

StatementS.K. Kapotas ; supervised by F.P.E. Dunne.
ContributionsDunne, F. P. E., Mechanical Engineering (M.M.T.).
ID Numbers
Open LibraryOL17273382M

Thermomechanical processing treatments for powder compacts formed from powdered superalloy compositions having a volume fraction of gamma prime greater than 35 percent are disclosed. Isothermal forging within critical ranges of strain rate and temperature is followed by supersolvus annealing and slow cooling treatments. An enlarged grain structure about 50 to 60 microns in size is produced. ingot-to-billet conversion of nickel-base superalloys. A unique feature of the model is the incorporation of rules describing the machine has been carried out to acquire the materials data required for the model. The analysis of the flow curves is due to the relatively large section sizes of the ingot (e.g. Overview of attention for book Table of Contents. Altmetric Badge. Book Overview. Chapter 7 Platinum-Containing New Generation Nickel-Based Superalloy for Single Crystalline Applications Effects on the Competition Between Discontinuous Precipitation Versus Continuous Precipitation of δ/η Phases in Model Ni-Based Superalloys. Rent or Buy Superalloys - by Reed, Roger C. for as low as $ at Voted #1 site for Buying Textbooks.


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large deformation material model for a nickel-based superalloy in forging by S. K. Kapotas Download PDF EPUB FB2

Nickel-based superalloy is the most used material in turbine engines because of its high strength and long fatigue life combined with good resistance to oxidation and corrosion at high temperature.

Nickel-based superalloy is the material of choice for the hottest engine components that are required to operate above °C. Without doubt, one. An internal state variable material model is used to describe the rate- and temperature-dependent large deformation response of the nickel-based superalloys Inconel and Inconel Plus.

Keywords: Material Model, Internal State Variable, Forging, Inconel Superalloys Abstract An internal state variable material model is used to describe the rate– and temperature– dependentlarge deformation response of the nickel-based superalloys Inconel and Inconel Plus.

Due to their excellent properties, nickel-based superalloys are extensively used in critical parts of modern aero engine and gas turbine.

The hot deformation behaviors of a typical nickel-based superalloy are investigated by hot compression tests with strain rate of (–1) s −1 and forming temperature of (–) °C. Results show that the flow stress is sensitive to the forming Cited by: The deformation behavior of a novel Ni-based superalloy was investigated using isothermal compression on a Gleeble system at temperatures between.

Materials. The nickel-based superalloy used in this study had a nominal composition NiCoCr-4Mo-4WAlTiNbBZrC (in weight percentage).

The powder was produced by argon atomization process and. Designing Hot Working Processes of Nickel-Based Superalloys Using Finite Element Simulation R. Kopp, R. Kopp At the end of this work a material model is adapted by the previously determined material data.

Forging Strain Rate and Deformation Temperature Effects on the Fracture Toughness Properties of Type L Stainless Steel Precharged. nickel based superalloy used for rotating forged pieces.

A The deformation model, developed for large finite strains, is based on the continuous theory of dislocations and micro- material) up to 95 µm before forging. (a) (b) Figure 2: Optical micrographs of the microstructures. D.A. Demania, Recovery and recrystallization in nickel-based superalloy Rene 88 DT () Google Scholar Y.C.

Lin, F.Q. Nong, X.M. Chen et al., Microstructure evolution and constitutive models to predict hot deformation behaviors of a nickel-based superalloy. The distribution of deformation activation energy Q as a function of strain rate and temperature for nickel-based superalloy was presented.

The processing maps were generated upon the basis of Prasad stability criterion for true strains ranging from to 1 at the deformation temperatures range of – °C, and strain rates range of Subsequent hot extrusion or forging may break and disperse the PPBs because of dynamic recrystallisation (DRX) which occurs when deformation is large enough.

Figure 1 shows a nickel-based superalloy powder ingot for HIP process, and the HIPed component as well as its corresponding microstructure. The analysis of the misorientation * Zhusheng Shi. The hot compression test of the spray formed plus hot isostatic pressed (HIP) nickel-based superalloy was conducted on GleebleD thermal mechanical simulator at a temperature range of   This paper presents a fully coupled thermomechanical model for the linear friction welding process of Inconel nickel-based superalloy by using the finite element method.

Powder metallurgy nickel-based superalloys have been widely used in high temperature applications. For these materials, a fully dense and fine-grained microstructure is important.

Full densification can be achieved by a suitable processing technique, while the latter can be achieved through recrystallisation for which valuable guidance is provided by the information about recrystallisation nuclei.

Prasad's criterion was widely used to describe the hot deformation behavior of nickel-based superalloys [21][22][23] [24] [25][26][27] and, in particular, Waspaloy [28][29][30].

Amiri et al. [   The microstructural development during these forging processes is dependent on the time–temperature–strain history in the material and this is clearly quite complex and modelling work in this area is relatively scarce as the execution of the full three-dimensional solution required is highly computationally intensive ().Simpler two-dimensional plane strain models or approximations allowing.

P. Zhang, C. Yi, G. Chen, H. Qin, C. Wang, Constitutive model based on dynamic recrystallization behavior during thermal deformation of a nickel-based superalloy. Metals Open Access Metall. 6(7), () Google Scholar.

The study of the behavior of nickel-based superalloys during plastic deformation is essential for the optimization of hot forging processes of such alloys. To characterize the hot deformation behavior and workability of materials, the use of processing maps based upon dynamic material modeling (DMM) was proposed by Prasad et al.

[ 20 ]. Nickel-based superalloys belong to a special class of high-performance alloys characterised by a significant amount of nickel. Differences between nickel-based superalloys are usually evident in the material composition, which are customised to produce specific properties depending on.

of the present paper is to investigate microstructure and mechanical properties of IN nickel-based inconel superalloy subjected to strengthening heat treatment. Keywords: Superalloys, high temperature alloys, IN nickel-based superalloy.

1 Introduction The origin of the term "Superalloy. The hot deformation behaviors of an as-cast nickel-based superalloy with dendrite microstructure were investigated by uniaxial compression experiments performed at temperatures of – °C (across γˊ-solvus) and strain rates of –1 s −1.

There exists a high positive correlation between peak flow stress and Zener-Hollomon parameter. Nickel-based superalloys have become key materials for turbine disks and other aerospace components due to their excellent mechanical properties at high temperatures.

Mechanical properties of nickel-based superalloys are closely related to their microstructures. Various heat treatment processes were conducted to obtain the desired microstructures of a nickel-based superalloy in this study.

At the end of this work a material model is adapted by the previously determined material data. This model is integrated into the Finite Element program LARSTRAN/SHAPE to calculate a forging process of the material Alloy Volume Subject Area: Designing Hot Working Processes of Nickel-Based Superalloys Using Finite Element Simulation.

Therefore, physically–based constitutive model based on classical dislocation theory and Avrami kinetics were developed and were applied to explain the deformation behaviors of Al-Zn-Mg-Cu alloys, Al-Li alloy, CuMg alloy and nickel-based superalloy et al.

Berment-Parr I et al. () Inhomogeneous grain coarsening behavior in supersolvus heat treated nickel-based superalloy RR Paper presented at the 13th Intenational Symposium of Superalloys (Superalloys ), Pennsylvania, USA, 11–15 September Google Scholar.

Why the plastic deformation properties could be changed to a very large degree, for example by forging, without changing the chemical composition.

These questions can be answered based on the idea proposed in by Taylor, Orowan and Polyani: Plastic deformation is due to the motion of a large number of dislocations.

Surface hardening treatment can usually introduce severe grain distortion with a large gradient in the surface layer. It results in mechanical properties being difficult to accurately determine through macroscopic tests due to the non-uniformity of the shot-peened material.

In this study, the mechanical behavior of uniformly pre-deformed nickel-based superalloy IN was investigated with.

procedures for the working of superalloys have been summarized by Sabroff, Henning and Boulger (1). The purpose of this paper is to reexamine the information about the hot working of superalloys in light of the current theories of deformation and rupture at high temperatures and strain rates.

At the end of this work a material model is adapted by the previously determined material data. This model is integrated into the Finite Element program LARSTRAN/SHAPE to calculate a forging process of the material Alloy Volume Subject Area: Designing Hot Working Processes of Nickel-Based Superalloys Using Finite Element Simulation.

To simulate multiple pass forging of billet, controlled, high temperature compression testing was used to apply alternate deformation and dwell cycles to Alloy specimens. Grain size obtained by simulation was found to be in excellent agreement with grain size from forged billet when cooling rate was included.

time for obtaining a fully dense material could be reduced following a logarithmic form. In this paper a novel forming process, i.e. direct powder forging of powdered nickel-based superalloys is proposed.

In this process, the encapsulated and vacuumed powder is heated up to a forming temperature and forged directly to the final shape, by using.

A general description of superalloys is followed by details of their chemistry and microstructure. Applications of forged superalloy components, forging issues and special considerations for forgers who handle superalloys are also examined. Superalloys are normally nickel-based, although cobalt- and iron-based superalloys have also been developed.

Hot Deformation Behavior and Processing Maps for a Large Marine Crankshaft S34MnV Lark, K.A., and Barker, D.R.: Modelling of dynamic material behavior in hot deformation: Forging of Ti L., and Yao, Z.: Hot deformation characteristics of alloy B nickel-based superalloy: A study using processing map.

Alloys Compd.This research investigated the effect of hot extrusion on the flow behaviour of nickel-based superalloy FGH by hot compression experiments in the temperature range from to °C and strain rates ranging from to s The influence of the hot extrusion on the initial microstructures, work hardening rate, strain rate sensitivity, and activation energy of deformation were.

However, there are few studies on deformation behaviors and mechanical properties of pure nickel N6 at room temperature. In this paper, cold deformation behaviors and mechanical properties of N6 were studied by tensile, compressive, and impact load experiment at room temperature.

This book contains the Proceedings 13th International Symposium on Superalloys. Development of a Low‐Density Rhenium‐Free Single Crystal Nickel‐Based Superalloy by Application of Numerical Multi‐Criteria Optimization Using Thermodynamic Calculations (Pages: ) Effect of Large Plastic Strains and Strain Gradients on Residual.

In this paper, the DDD model was presented to study plastic deformation in a single-crystal nickel-based superalloy CMSX4 under monotonic and cyclic loading conditions at °C. The material’s mechanical response predicted by the validated CP model at 1/s strain rate in both and orientations was used to calibrate the DDD model.

A superalloy, or a high-performance alloy, is an alloy that exhibits excellent mechanical strength and creep resistance at high temperatures, good surface stability, and corrosion and oxidation resistance.A superalloy's base alloying element is usually nickel, cobalt, or nickel-iron.

Superalloy development has relied heavily on both chemical and process innovations and has been driven. Nickel-base superalloys are the material of choice for the harshest operating conditions in gas turbine engines. Superalloys are used in the high temperature regions of the gas turbine, specifically the turbine blades and turbine disks.

The blades lie in the gas stream and extract the work to power the aircraft and the turbine disks, which in turn constrain the blades and.

Title: Direct powder forging of PM nickel-based Superalloy: densification and recrystallisation: Authors: Wang, S Fang, S Shi, Z Jiang, J Zhou, X Lin, J. The dynamic recrystallization (DRX) behavior of Ni–Cr–Co–W–4Mo–Al–Ti superalloy was investigated by means of isothermal compression tests in the temperature range of – °C and strain rate range of –1 s − was found that the nucleation mechanisms of discontinuous DRX and continuous DRX (CDRX) occurred simultaneously during hot deformation, and.What is claimed is: 1.

A powdered nickel based superalloy consisting essentially of: in weight percent, about 10 to 12 percent chromium, about 17 to 19 percent cobalt, about to percent molybdenum, about to percent tungsten, about to percent aluminum, about to percent titanium, about to percent tantalum, about to percent zirconium, up to.Study of static recrystallization behavior in hot deformed Ni-based superalloy using cellular automaton model.

Materials & Design, Vol. 99, Issue., p. alloy subjected to elevated-temperature heat deformation. Materials Research Express, Vol. 5, Issue. 4, p. during metadynamic recrystallization in a nickel-based superalloy.