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An experimental study of the precipitation kinetics of pre-rolled Ni-Span-C 902 superalloy

  • Mohammad Rasool Moazami Godarzi , Maryam Morakabati , Seyed Mahdi Abbasi and Hassan Badri
Published/Copyright: January 7, 2015
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 106 Issue 1

Abstract

In the present work, the effects of cold work and aging parameters on the microstructure and precipitation kinetics of Ni-Span-C 902 superalloy were studied. The solution treated alloy was cold-rolled to different deformations from 30 to 60% followed by aging in the temperature range of 450–850°C for different times, from 102 to 105 seconds. The results showed that the 50% cold-rolled alloy attained its maximum hardness by aging at 650°C for 105 seconds. This was concurrent with the fine distributed gamma′ precipitates that appeared in the microstructure. By increasing temperature from 750 to 850°C, overaging occurred due to the increase in gamma′ particle size and the formation of epsilon-phase. The estimated activation energy of the precipitation reaction, based on Johnson–Mehl–Avrami–Kolmogorov analysis, was determined to be 254 kJ · mol−1 for the 50% cold-rolled alloy.

Keywords: Superalloy; Aging; Cold working; JMAK analysis
* Correspondence address, Associate Professor Seyed Mahdi Abbasi, Tehransar, Lale Avenue, Badakhshan Street, Number 40, 1387944968, Tehran, Iran. Tel.: +98 9124181452, E-mail:

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Received: 2014-04-24
Accepted: 2014-08-15
Published Online: 2015-01-07
Published in Print: 2015-01-09

© 2015, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111149
Keywords for this article
Superalloy; Aging; Cold working; JMAK analysis

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. A novel roll-bonding methodology for the cross-scale analysis of phase properties and interactions in multiphase structural materials
  5. Excellent cold rollability in a single pass of an Mg-4Er (wt.%) alloy
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  7. Influences of high temperature on the microstructural, electrical and mechanical properties of Ni-23 wt.% Al alloy
  8. Investigation of the wear resistance and microstructure of Al/SiC metal matrix composites as a function of reinforcement volume fraction and reinforcement to matrix particle size ratio applying artificial neural network
  9. Influence of zinc (II) ion concentration on Ni–Zn–P coatings deposited onto aluminum and their corrosion behavior
  10. Joining steel to aluminum alloy by resistance spot welding with a rivet
  11. Electrophysical and structure-sensitive properties of liquid Ga–In alloys
  12. Short Communications
  13. Synthesis and characterization of the novel nanocomposite Co(OH)2/graphene as supercapacitor materials
  14. Preparation of MnAlC flakes by surfactant-assisted ball-milling and the effects of annealing
  15. An improved two-stage sintering method for tungsten heavy alloys: conventional solid-phase sintering followed by microwave heating
  16. Effect of excess Pb on ferroelectric characteristics of conductive Al-doped ZnO and Sn-doped In2O3 top electrodes in PbLaZrTiOx capacitors
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