Failure analysis on welded joints of 347H austenitic boiler tubes

2015 ◽  
Vol 57 ◽  
pp. 413-422 ◽  
Author(s):  
Han-sang Lee ◽  
Jine-sung Jung ◽  
Doo-soo Kim ◽  
Keun-bong Yoo
Keyword(s):  
Failure Analysis ◽  
Welded Joints ◽  
Boiler Tubes

The sensitivity of failure analysis of boiler tubes to the shape of elliptical external erosion flaws

2021 ◽  
Vol 119 ◽  
pp. 104952
Author(s):  
Ifeanyi Emmanuel Kalu ◽  
Helen Mary Inglis ◽  
Schalk Kok
Keyword(s):  
Failure Analysis ◽  
Boiler Tubes

Failure Analysis of Ni Based Superalloys Welded Joints

2015 ◽  
Vol 1111 ◽  
pp. 240-245
Author(s):  
Ramona Monica Buzdugan ◽  
Nicolae Farbas ◽  
Corneliu Marius Crăciunescu
Keyword(s):  
Fracture Surface ◽  
Failure Analysis ◽  
Fusion Zone ◽  
Welded Joints ◽  
Wide Field ◽  
Petrochemical Plant ◽  
Extreme Temperatures ◽  
Plastic Deformations ◽  
Gtaw Process ◽  
Corrosive Environments

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.

The High Cyclic Failure Analysis of Welded Joints of CT Specimens

2010 ◽  
Vol 165 ◽  
pp. 183-188
Author(s):  
Rimantas Stonkus ◽  
Mindaugas Kazimieras Leonavičius
Keyword(s):  
Mechanical Properties ◽  
Cyclic Loading ◽  
Failure Analysis ◽  
Failure Mechanism ◽  
Welded Joints ◽  
Failure Process ◽  
Static Fracture ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Scanning Electron

The results of failure process of welded joints subjected to high-cyclic loading are presented. Analysis of the microstructure of welded joints, indexes of mechanical properties are provided and failure mechanism in the area of fatigue and static fracture is analyzed. The fractographic analysis of CT specimens was performed by means of optical and scanning electron microscopes.

scholarly journals Failure Analysis of Dissimilar Steel Welded Joints in a 3033t/h USC Boiler

2014 ◽  
Vol 3 ◽  
pp. 1706-1710 ◽  
Author(s):  
Wei Wang ◽  
Xue Wang ◽  
Wanli Zhong ◽  
Lei Hu ◽  
Ping Hu
Keyword(s):  
Failure Analysis ◽  
Welded Joints ◽  
Dissimilar Steel

scholarly journals Failure analysis of tube-to-tubesheet welded joints in a shell-tube heat exchanger

2016 ◽  
Vol 7 ◽  
pp. 32-40 ◽  
Author(s):  
Long Liu ◽  
Ning Ding ◽  
Junbo Shi ◽  
Na Xu ◽  
Weimin Guo ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Failure Analysis ◽  
Welded Joints ◽  
Tube Heat Exchanger
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