Failure Analysis of Ni Based Superalloys Welded Joints

Ramona Monica Buzdugan; Nicolae Farbas; Corneliu Marius Crăciunescu

doi:10.4028/www.scientific.net/AMR.1111.240

Paper Titles

Determining the Properties and Structure of Welded Copper Plates and Establishing their Connection with the Temperature Field Distribution in the Studied Zones
p.217

Structural Connections of Steel Building Frames under Extreme Loading
p.223

Design by Qualification Testing of Reduced Beam Section Welded Connections
p.229

Optimization of Laser Beam Cutting Process Parameters of Austenitic Materials
p.235

Failure Analysis of Ni Based Superalloys Welded Joints
p.240

Structural Hardening of Excavator Teeth Used in Exploitation of Magmatic Rocks
p.246

Structural and Functional Characterization of Ultrasonic Joining for Multiwire Conductors for Automotive Industry
p.252

Joining of Y₂O₃-Doped Aluminum Nitride with High Density Graphite by Spark Plasma Sintering
p.260

Investigations on Structural Integrity of a Petrochemical Component
p.266

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1111Failure Analysis of Ni Based Superalloys Welded...

Failure Analysis of Ni Based Superalloys Welded Joints

Abstract:

Ni-based super alloys are used in a wide field of applications like chemical, nuclear, petrochemical and furnace industries, where extreme temperatures, mechanical stresses and corrosive environments are encountered. The paper presents the failure analysis of an assembly used in a petrochemical plant after 40000 functioning hours at high temperatures. The assembly is composed of a catalyst tube made of KHR 35CT and a weldolet made of INCOLOY 800HT welded by GTAW process using INCONNEL 82 as filler material. SEM and EDX analysis were carried out and it was found that the fracture occurred by the weldolet detachment, following the fusion zone. The fracture surface presents grain boundaries precipitations and no major plastic deformations.

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Periodical:

Advanced Materials Research (Volume 1111)

Pages:

240-245

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1111.240

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Online since:

July 2015

Authors:

Ramona Monica Buzdugan, Nicolae Farbas, Corneliu Marius Crăciunescu

Keywords:

Fracture, Ni-Based Super Alloys, SEM/EDX, Welded Joints

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References

[1] H. Singh, D. Puri & Satya Prakash, An overview of Na2SO4 and/or V2O5 induced hot Corrosion of Fe- and Ni-based superalloys, Rev. Adv. Mat. Sci. 16(2007), 27-50.

Google Scholar

[2] G. H. Meier, Materials sciences and engineering, A120 (1989), 1-11.

Google Scholar

[3] D. W. MacLachlan & D.M. Knowles, Modeling and prediction of the stress rupture behaviour of single crystal superalloys, Mater. Sci. Eng. 302 (2001), Issue 2, 275-285.

DOI: 10.1016/s0921-5093(00)01829-3

Google Scholar

[4] C. -N. Weia, H. -Y. Borb & Li Changa, The influence of carbon addition on carbide characteristics and mechanical properties of CM-681LC superalloy using fine grain process, Journal of Alloys and Compounds, 509 (2011), Issue 18, 5708-5714.

DOI: 10.1016/j.jallcom.2011.02.146

Google Scholar

[5] H. Kitaguchi, Microstructure-Property Relationship in Advanced Ni-Based Superalloys, Metallurgy – Advances in Materials and Processes, 19-42.

DOI: 10.5772/52011

Google Scholar

[6] S. R. Gertler, Cracking of Inconel 800H in a Steam Methane Reformer Furnace, Handbook of Case Histories in Failure Analysis, Vol. 2, K.A. Esakul, Ed. ASM International, (1992).

DOI: 10.31399/asm.fach.v02.c9001328

Google Scholar

[7] L.A. Spyrou et. all., Evaluation of creep damage of INCOLOY 800HT pigtails in a refinery steam reformer unit, Engineering Failure Analysis 45 (2014) 456–469.

DOI: 10.1016/j.engfailanal.2014.07.017

Google Scholar