Fracture behavior of inconel 718 at high temperature

O. Bapokutty, Zainuddin Sajuri, J. Syarif, A. R. Said

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The effect of heat treatment on tensile and creep properties of nickel-base superalloy, Inconel 718 in room and at high temperature was investigated. Solution treatment was applied on the as-received material at 980°C for 1 hour before water quenched followed by double aging treatments at 720°C and 621°C for 8 hours, respectively and then cooled in air. The tensile strength at elevated temperatures of 550°C and 650°C were slightly deteriorated for heat treated and as-received materials. Beside strength, significant difference was observed in the elongation. The elongation of heat treated samples drastically reduced to 4 to 5% only compared to that of the as received materials which exhibited more than 30% elongation. The significant increased in tensile strength is suspected due to the present of γ′, γ″ and δ precipitates which pinned the movement of grain boundary and sliding. However, the present of these precipitates caused the material to become harder and brittle. Moreover, the increase in load from 70% to 90% UTS and in temperature significantly accelerated the creep rate.

Original languageEnglish
Title of host publicationKey Engineering Materials
Pages1244-1249
Number of pages6
Volume462-463
DOIs
Publication statusPublished - 2011
Event8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010 - Kuala Lumpur
Duration: 7 Jun 20109 Jun 2010

Publication series

NameKey Engineering Materials
Volume462-463
ISSN (Print)10139826

Other

Other8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010
CityKuala Lumpur
Period7/6/109/6/10

Fingerprint

Elongation
Precipitates
Creep
Tensile strength
Temperature
Nickel
Superalloys
Grain boundaries
Aging of materials
Heat treatment
Water
Air
Hot Temperature

Keywords

  • Creep
  • Fracture surface
  • Heat treatment
  • Inconel 718
  • Microstructure
  • Tensile

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Bapokutty, O., Sajuri, Z., Syarif, J., & Said, A. R. (2011). Fracture behavior of inconel 718 at high temperature. In Key Engineering Materials (Vol. 462-463, pp. 1244-1249). (Key Engineering Materials; Vol. 462-463). https://doi.org/10.4028/www.scientific.net/KEM.462-463.1244

Fracture behavior of inconel 718 at high temperature. / Bapokutty, O.; Sajuri, Zainuddin; Syarif, J.; Said, A. R.

Key Engineering Materials. Vol. 462-463 2011. p. 1244-1249 (Key Engineering Materials; Vol. 462-463).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bapokutty, O, Sajuri, Z, Syarif, J & Said, AR 2011, Fracture behavior of inconel 718 at high temperature. in Key Engineering Materials. vol. 462-463, Key Engineering Materials, vol. 462-463, pp. 1244-1249, 8th International Conference on Fracture and Strength of Solids 2010, FEOFS2010, Kuala Lumpur, 7/6/10. https://doi.org/10.4028/www.scientific.net/KEM.462-463.1244
Bapokutty O, Sajuri Z, Syarif J, Said AR. Fracture behavior of inconel 718 at high temperature. In Key Engineering Materials. Vol. 462-463. 2011. p. 1244-1249. (Key Engineering Materials). https://doi.org/10.4028/www.scientific.net/KEM.462-463.1244
Bapokutty, O. ; Sajuri, Zainuddin ; Syarif, J. ; Said, A. R. / Fracture behavior of inconel 718 at high temperature. Key Engineering Materials. Vol. 462-463 2011. pp. 1244-1249 (Key Engineering Materials).
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