Effect of Thermal Exposure on Long-Term Heated Microstructures at 900°C of Nickel Base Superalloy Turbine Blade, Grade Inconel 738

Panyawat Wangyao; Sureerat Polsilapa; Surang Singmaneesakulchai; Aimamorn Promboopha

doi:10.4028/www.scientific.net/KEM.658.19

Paper Titles

Preface, Scientific Committee, Organizers and Sponsors

Development of Forming Processes for MoNiCr Alloy
p.3

Effect of Alloying Modification in Arc Melted Hastelloy X on Microstructures and Oxidation Resistance at Elevated Temperatures
p.8

Effect of Pre-Weld Heat Treatment Temperatures on TIG Welded Microstructures on Nickel Base Superalloy, GTD-111
p.14

Effect of Thermal Exposure on Long-Term Heated Microstructures at 900°C of Nickel Base Superalloy Turbine Blade, Grade Inconel 738
p.19

Effect of Thermal Exposure on Long-Term Heated Microstructures at 900°C of Nickel Base Superalloy Turbine Blades, Grade Udimet 500
p.25

Effects of Isothermal Aging on Microstructure Evolution of Biomedical Co-Cr-Mo Alloy
p.31

Direct Observation of Liquation in Ni-Base Superalloy by Using Confocal Laser Scanning Microscopy
p.36

Atmospheric Corrosion Behavior Assessment of Carbon Steel Pipes Using Cyclic Salt Spray Test
p.42

HomeKey Engineering MaterialsKey Engineering Materials Vol. 658Effect of Thermal Exposure on Long-Term Heated...

Effect of Thermal Exposure on Long-Term Heated Microstructures at 900°C of Nickel Base Superalloy Turbine Blade, Grade Inconel 738

Abstract:

The objectives of this research are to search for the most appropriate heat treatment condition for rejuvenating microstructure of cast nickel base superalloy, grade IN-738, turbine blades after using to prolong its life time service again. The turbine blades that had been used for long term service under load and high temperatures resulted in small gamma prime particles connecting to each other and thus forming into larger particles. This effect generally reduces creep resistance and increases the failure. In this research, 5 IN-738 superalloy samples were reheat-treated under simulation of 2 working conditions. First, they were heated at 900oC. At every 400 hours from the beginning of heat treatment until time reaching 1600 hours, these samples were collected and examined the microstructures, size and area fraction of gamma prime particles. Another heating program, they received an over thermal exposure heating at 1125oC for 1 hour after long-term heated at 900oC after every 400 hours-heating. Then the results were analyzed from working conditions. It was found that the sample passed solutioning at 1125oC for 4 hours and aging at 845oC for 24 hours with the over thermal exposure showed the most stable phase stability with γ’ phase increasing after long-term simulated working conditions .

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 658)

Pages:

19-24

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.658.19

Citation:

Cite this paper

Online since:

July 2015

Authors:

Panyawat Wangyao*, Sureerat Polsilapa, Surang Singmaneesakulchai, Aimamorn Promboopha

Keywords:

Inconel 738, Nickel Base Superalloy, Over Thermal Exposure, Reheat Treatment

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] P. Wongbunyakul, P. Visuttipitukkul, P. Wangyao, G. Lothongkum, P. Sricharoenchai, High Temperature Materials and Processes, 33(5) (2014) 453-461.

DOI: 10.1515/htmp-2013-0065

Google Scholar

[2] P. Wangyao, P. Jariyasakuntham, S. Polsilapa, A. Promboobpa, S. Pongsugitwat, Advanced Materials Research, 1025-1026 (2014) 395-402.

DOI: 10.4028/www.scientific.net/amr.1025-1026.395

Google Scholar

[3] P. Wangyao, T. Eiriyakul, S. Polsilapa, P. Srigiofun, O. Srihakulang, Applied Mechanics and Materials, 548-549 (2014) 268-273.

DOI: 10.4028/www.scientific.net/amm.548-549.268

Google Scholar

[4] S. Polsilapa, P. Wangyao, P. Boonpou, A. Promboobpa, S. Pongsugitwat, Advanced Materials Research, 1025-1026 (2014) 455-460.

DOI: 10.4028/www.scientific.net/amr.1025-1026.455

Google Scholar

[5] P. Wangyao, P. Suvanchai, N. Chuankrerkkul, A. Thueploy, W. Homkrajai, High Temperature Materials and Processes, 29(4) (2010) 277-285.

DOI: 10.1515/htmp.2010.29.4.277

Google Scholar

[6] P. Wangyao, N. Chuankrerkkul, S. Polsilapa, P. Sopon, W. Homkrajai, Chiang Mai Journal of Science, 36(3) (2009) 312-319.

Google Scholar

[7] P. Wangyao, G. Lothongkum, V. Krongtong, W. Homkrajai, N. Chuankrerkkul, Chiang Mai Journal of Science, 36(3) (2009) 287-295.

Google Scholar

[8] P. Wangyao, S. Polsilapa, P. Chaishom, W. Homkrajai, N. Panich, High Temperature Materials and Processes, 27(1) (2008) 41-49.

DOI: 10.1515/htmp.2008.27.1.41

Google Scholar