Metallurgical Investigation of Crossing Noses

2021 ◽  
pp. 81-91
Author(s):  
Hilmar Kjartansson Danielsen ◽  
Somrita Dhar ◽  
Carsten Jørn Rasmussen ◽  
Dorte Juul Jensen
Keyword(s):  
Metallurgical Investigation

Metallurgical investigation of electron beam welded duplex stainless steel X2CrNiMoN22-5-3 with plasma nitrided weld edge surfaces

2018 ◽  
Vol 60 (6) ◽  
pp. 577-582
Author(s):  
Sergii Krasnorutskyi ◽  
Christian Kipp ◽  
Jonas Hensel ◽  
Peter Kaestner ◽  
Sven Hartwig ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Beam ◽  
Duplex Stainless Steel ◽  
Metallurgical Investigation ◽  
Weld Edge

scholarly journals Metallurgical Investigation and Functional Consideration of the Iron Swords from Bongseon-ri Site in Seocheon

2014 ◽  
Vol 30 (2) ◽  
pp. 111-122
Author(s):  
Hyun Kyung Cho ◽  
Young Sang Jung ◽  
Nam Chul Cho ◽  
Hun Lee
Keyword(s):  
Metallurgical Investigation ◽  
Functional Consideration

Metallurgical investigation of prematurely failed hot-strip mill work-rolls: Some microstructural observations

2004 ◽  
Vol 4 (3) ◽  
pp. 58-66 ◽  
Author(s):  
Amitava Ray ◽  
M. S. Prasad ◽  
P. K. Barhai ◽  
S. K. Mukherjee
Keyword(s):  
Hot Strip Mill ◽  
Metallurgical Investigation ◽  
Hot Strip ◽  
Work Rolls

Cracking of AFNOR 7020 Aluminum Alloy Adaptor Used for Aerospace Applications: A Metallurgical Investigation

2009 ◽  
Vol 9 (5) ◽  
pp. 414-419 ◽  
Author(s):  
Abhay K. Jha ◽  
G. Naga Sirisha ◽  
P. Ramesh Narayanan ◽  
K. Sreekumar
Keyword(s):  
Aluminum Alloy ◽  
Metallurgical Investigation ◽  
Aerospace Applications

Failure Investigation of 1st Stage Buckets From Frame 3002, 10 MW Gas Turbine Unit

2011 ◽  
Author(s):  
Girish M. Shejale ◽  
David Ross
Keyword(s):  
Gas Turbine ◽  
Test Results ◽  
High Carbon ◽  
High Carbon Content ◽  
Metallurgical Investigation ◽  
Root Cause ◽  
Failure Investigation ◽  
Surface Failure ◽  
Grain Boundary Embrittlement ◽  
Industrial Gas Turbine

The 1st stage buckets in Frame 3002, 10 MW industrial gas turbine experienced premature failures. The buckets failed unexpectedly much earlier than the designed bucket life. Bucket material is Inconel 738, with platinum-aluminized coating on the surface. Failure investigation of the buckets was performed to know the root cause of the failure. The failure investigation primarily comprised of metallurgical investigation. The results of the metallurgical investigation were co-related with the unit operational history. This paper provides an overview of 1st stage buckets investigation. The metallurgical investigation performed concluded prime failure mechanism due to high carbon content of bucket material and improper heat treatment. The bucket coating was initially damaged during the first loading and fracture occurred due to grain boundary embrittlement in short span of service. The metallurgical tests performed included Visual inspection, Scanning Electron Microscopy (SEM), Energy Dispersive Analysis of X-ray (EDS), Chemical analysis, Tensile test and Hardness survey. The test results, discussions and conclusions are presented in this paper.

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