Paper Title:
Interaction of the Precipitation Kinetics of δ And γ’ Phases in Nickel-Base Superalloy ATI Allvac® 718PlusTM
  Abstract

In this paper, the precipitation behaviour of  (Ni3(Nb,Al)) and ’ (Ni3(Al,Ti,Nb)) phases in the nickel-base superalloy ATI Allvac® 718PlusTM, as well as their kinetic interactions are discussed. Important parameters such as volume fraction, mean radius and number density of precipitates are experimentally determined and numerically simulated as a function of the heat treatment parameters time and temperature. To match the experimentally observed kinetics, the predicted interfacial energy of the precipitates, as calculated for a sharp, planar phase boundary, is adjusted to take into account the interfacial curvature and entropic effects of a diffuse interface. Correction functions for the interfacial energies of  as well as ’ precipitates are presented. Using these modified interfacial energies, the calculated results show excellent agreement with the experimental measurements.

  Info
Periodical
Materials Science Forum (Volumes 638-642)
Main Theme
Edited by
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
Pages
2712-2717
DOI
10.4028/www.scientific.net/MSF.638-642.2712
Citation
R. Radis, G. A. Zickler, M. Stockinger, C. Sommitsch, E. Kozeschnik, "Interaction of the Precipitation Kinetics of δ And γ’ Phases in Nickel-Base Superalloy ATI Allvac® 718PlusTM", Materials Science Forum, Vols. 638-642, pp. 2712-2717, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Christof Sommitsch, Daniel Huber, Martin Stockinger
Abstract:During hot working of the recently developed nickel based alloy Allvac 718PlusTM softening kinetics like dynamic, metadynamic as well as...
2327
Authors: Xi Shan Xie, Shu Hong Fu, Shuang Qun Zhao, Jian Xin Dong
Abstract:The second phase precipitation strengthening effect of , +, + phases in INCONEL718 type and newly developed INCONEL740® Ni-base...
2363
Authors: Sinem Cevik Uzgur, Yagiz Uzunonat, S. Fehmi Diltemiz, Melih Cemal Kushan, Rabia Gunay
Abstract:Innovations on the aerospace and aircraft industry have been throwing light upon building to future’s engineering architecture at the today’s...
131
  | Authors: Daniel Huber, Christof Sommitsch, Martin Stockinger
Abstract:Aerospace gas turbine disks operate in an environment of relatively high stresses caused by centrifugal forces and elevated temperatures....
168
Authors: M.R. Ahmadi, L. Whitmore, E. Povoden-Karadeniz, M. Stockinger, A. Falahati, E. Kozeschnik
Abstract:In the present study, we describe a comprehensive and consistent physical model for the yield strength change in Allvac®...
7