Non-destructive evaluation of residual stresses in the multi-pass steel weldments

Download

index.pdf

Date

2012

Author

Erian, Gökhan

Metadata

Show full item record

Item Usage Stats

60
views

55
downloads

The purpose of this thesis is non-destructive determination of residual stress state in the multi-pass welded steel plates by Magnetic Barkhausen Noise (MBN) technique. To control the effectiveness of the developed procedure, continuous MBN measurements on the heat affected zone and parent metal of the welded plates were performed. In the experimental part, various steel plates were welded with different number of weld passes. Various series of samples were prepared for residual stress and for angular deflection measurements. Microstructural investigation and hardness measurements were also conducted. The results were discussed to evaluate the effectiveness of MBN measurements to monitor the changes in the residual stress state in the welded components as a function of weld pass number.

Subject Keywords

Steel, Steel, Steelwork., Steel, Residual stresses.

URI

http://etd.lib.metu.edu.tr/upload/12614749/index.pdf
https://hdl.handle.net/11511/21962

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Non-destructive determination of residual stress state in steel weldments by Magnetic Barkhausen Noise technique Yelbay, Hasan İlker; Çam, İbrahim; Gür, Cemil Hakan (2010-01-01) The purpose of this study is non-destructive determination of residual stresses in the welded steel plates by Magnetic Barkhausen Noise (MBN) technique. A MBN-stress calibration set-up and a residual stress measurement system with scanning ability were developed. To control the accuracy and the effectiveness of the developed system and procedure, various MBN measurements were carried out. The MBN results were verified by the hole-drilling method. Microstructural investigation and hardness measurements were ...
Investigating the Effects of Subsequent Weld Passes on Surface Residual Stresses in Steel Weldments by Magnetic Barkhausen Noise Technique Gür, Cemil Hakan; Batıgün, Caner; Çam, İbrahim (2016-03-01) Variations of surface residual stresses with subsequent weld passes were investigated in API 5L X70 steel plates by the magnetic barkhausen noise (MBN) technique. The plates were welded by applying a number of different passes under fully clamped conditions. After each weld pass, the MBN signal and hardness distributions on the front and back surfaces of the plates were measured. A specific calibration procedure and setup were used for conversion of the MBN signals into elastic stress values. The results we...
Investigating the effects of subsequent weld passes on surface residual stresses in steel weld merits by Magnetic Barkhausen Noise technique Gür, Cemil Hakan; Batıgün, Caner; Çam, İbrahim (American Society of Nondestructive Testing, 2016-03-01)
Dynamic strain aging of dual phase steels in forming applications Bayramin, Berkay; Efe, Mert; Department of Metallurgical and Materials Engineering (2017) Sheet metals are subjected to certain temperatures (25-200oC) and strain rates (1-10 s-1) during forming applications. These thermomechanical conditions may cause dynamic strain aging (DSA) in various grades of steels including dual phase (DP) steels. DSA represent itself as serrations in the stress-strain curves. Two grades of DP steels (DP590 and DP800) were studied systematically at different strain rates (10-3s-1-1s-1) and temperatures (25oC-400oC) to investigate the DSA effects on the mechanical proper...
Numerical and Experimental Determination of the Residual Stress State in Multipass Welded API 5L X70 Plates Garipova, Nuriya; Batıgün, Caner; Gür, Cemil Hakan (2014-01-01) Residual stress distributions in multipass welded API 5L X70 steel plates were determined by numerical and experimental methods. SYSWELD finite element software was used for numerical simulations. Microstructure variations were also considered for calculation of residual stresses. The continuous cooling transformation diagram was obtained via JMatPro software. The results showed that residual stress distribution is sensitive to number of weld passes, and microstructure changes. The simulation results were c...

Citation Formats

G. Erian, “Non-destructive evaluation of residual stresses in the multi-pass steel weldments,” M.S. - Master of Science, Middle East Technical University, 2012.