Panda, A K and Roy, Rajat K and Mitra, A (2013) Electromagnetic Non-destructive Evaluation of Post Weld Heat Treated Modified9Cr-1Mo Steel Weldments. In: Asia pacific conference on NDT (APCNDT) 2013, 18-22 Dec 2013, Mumbai.
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Abstract
In the present investigation, two service exposed tubes of modified 9Cr-1Mo steel, welded as butt joint by Tungsten inert gas (TIG) technique has been considered. The tubes have been post weld heat treated for 3 hrs at 650,700 and 750degC. The fusion zone (FZ), heat affected zone (HAZ) and base metal (BM) showed different Magnetic Barkhausen emission (MBE) signals. It was also observed that with increase in PWHT, the RMS voltage of MBE signal increased. The microstructural modifications post-weld heat treatments revealed distinct effect not only on MBE but also on Magnetic hysteresis loop (MHL) properties. The observation of weldment zones through Giant Magneto-impedance (GMI) based sensing device named as ‘MagSys’ developed at CSIR-NML will be discussed in the conference presentation.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Official URL/DOI: | http://eprint.nmlindia.org/7089 |
| Uncontrolled Keywords: | magnetic barkhausen, magnetic hysteresis, weldments, CrMo |
| Divisions: | Material Science and Technology |
| ID Code: | 7089 |
| Deposited By: | Dr. A.K. Panda |
| Deposited On: | 23 Sep 2014 10:12 |
| Last Modified: | 23 Sep 2014 10:12 |
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