Modeling of flow stress constitutive behavior of GH2984 superalloy for the prospective 700 °C fossil power plant

Jia, Peng; Wang, Engang; He, Jicheng
May 2013
AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p427
Academic Journal
Due to its excellent creep rupture strength and low cost, superalloy GH2984 has becoming a promising material to be used as heat exchanger in the prospective 700 °C fossil power plant. The mechanical response of the material under various forming conditions, which is a particularly important indicator for the superalloy, strongly depends on the forging temperature and strain rate. In current study, based on the measured stress-strain curves under different temperatures and strain rates, a series of flow stress constitutive equations for GH2984 superalloy were established through the classical theories on work hardening and softening. The comparison between the experimental and modeling results has confirmed that the established constitutive equations can correctly describe the mechanical responses and microstructural evolutions of the GH2984 under various hot deformation conditions.


Related Articles

  • Stress-Rupture Characterization in Nickel-Based Superalloy Gas Turbine Engine Components. Pridemore, Wesley D. // Journal of Failure Analysis & Prevention;Jun2008, Vol. 8 Issue 3, p281 

    Today’s gas turbine engines utilize high volume fraction gamma prime (γ′) strengthened alloys for turbine airfoils, which typically operate at temperatures greater than ∼0.5 T m of the alloy. At these temperatures and at stresses below yield, time-dependent deformation...

  • Forming characteristics of austenitic stainless steel sheet alloys under warm hydroforming conditions. Koç, Muammer; Mahabunphachai, Sasawat; Billur, Eren // International Journal of Advanced Manufacturing Technology;Sep2011, Vol. 56 Issue 1-4, p97 

    Stainless steel sheet alloys have been increasingly used in heating, ventilating, and air conditioning; appliance; sanitary and medical devices; as well as several structural and transportation applications, due to their high strength-to-weight ratio, corrosion resistance, biomedical...

  • A Device for the Study of the Surface Tension of Liquid Metal Solutions with an Increased Elasticity of Intrinsic Vapors. Alchagirov, A. B.; Alchagirov, B. B.; Khokonov, Kh. B. // Instruments & Experimental Techniques;May/Jun2003, Vol. 46 Issue 3, p413 

    This device makes it possible to determine the temperature and concentration dependencies of the surface tension of liquid metal solutions from the change in the shape of a lying (sessile) drop. In particular, the device is used to study amalgams of refractory metals, one of whose components...

  • Inversion Procedure for Eddy Current Profiling of the Near-Surface Residual Stress in Shot-Peened Metals. Yu, F.; Nagy, P. B. // AIP Conference Proceedings;2005, Vol. 760 Issue 1, p1355 

    Because of their frequency-dependent penetration depth, eddy current measurements are capable of mapping the near-surface depth profile of the electrical conductivity. This technique can be used to nondestructively characterize the subsurface residual stress distribution in certain types of...

  • Strain effects in group-III nitrides: Deformation potentials for AlN, GaN, and InN. Qimin Yan; Rinke, Patrick; Scheffler, Matthias; van de Walle, Chris G. // Applied Physics Letters;9/21/2009, Vol. 95 Issue 12, p121111 

    A systematic density functional theory study of strain effects on the electronic band structure of the group-III nitrides (AlN, GaN, and InN) is presented. To overcome the deficiencies of the local-density and generalized gradient approximations the Heyd–Scuseria–Ernzerhof (HSE)...

  • Creep effects on early damage initiation in a TBC system. Ali, M.Y.; Nusier, S.Q.; Newaz, G.M. // Journal of Materials Science;May2004, Vol. 39 Issue 10, p3383 

    High temperature superalloys coated with thermal barrier coating (TBC) may induce creep effects in different layers such as in the bond coat and the thermally grown oxide (TGO) layer. The effects of creep deformation in these layers were investigated on the magnitude of residual stresses in...

  • Influence of thermo-mechanical treatment on the precipitation strengthening behavior of Inconel 740, a Ni-based superalloy. Jun-Hak Oh; Byung-Gil Yoo; In-Chul Choi; Santella, Michael L.; Jae-il Jang // Journal of Materials Research;5/28/2011, Vol. 26 Issue 10, p1253 

    In this work, we have systematically explored the influence of thermo-mechanical treatment on the precipitation behavior and its strengthening in Inconel 740, a relatively new Ni-based superalloy, using specimens on which different levels of stresses were applied at 700 °C. With increasing...

  • Strain-Dependent Flow Stress Modeling of Hastelloy X Superalloy under Hot Compression. Horng-Yu Wu; Hsu-Cheng Liu; Feng-Jun Zhu; Chui-Hung Chiu // Advanced Materials Research;2014, Issue 912-914, p471 

    The compression deformation behavior and constitutive relation of Hastelloy X superalloy were investigated in the temperature range of 950 °C to 1150 °C and strain rate range of 0.001 s-1 to 1 s-1 on a Gleeble-3500 thermo-simulation machine. The obtained experimental stress-strain data...

  • Constitutive Modeling of Dynamic Recrystallization Kinetics and Processing Maps of Solution and Aging FGH96 Superalloy. Nie, Longfei; Zhang, Liwen; Zhu, Zhi; Xu, Wei // Journal of Materials Engineering & Performance;Dec2013, Vol. 22 Issue 12, p3728 

    The hot deformation behavior of solution and aging FGH96 superalloy were investigated in the deformation temperature range of 1000-1175 °C and strain rate range of 0.001-5.0/s on a Gleeble-1500 thermo-mechanical simulator. The results show that the true stress-strain curves are typical of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics