Microstructure Characterization of a Heterogeneous Weld for Welded Rotors

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.741.128 ◽

2017 ◽

Vol 741 ◽

pp. 128-133

Author(s):

Vlastimil Vodárek ◽

Anastasia Volodarskaja

Keyword(s):

Power Plants ◽

Stress Relief ◽

Post Weld Heat Treatment ◽

Microstructure Characterization ◽

Full Scale ◽

Internal Quality ◽

Parent Materials ◽

Weld Metals ◽

Final Stress

The paper deals with microstructure characterization of a full-scale X14CrMoVNbN 10 1/ 27NiCrMoV 15-6 heterogeneous weld intended for IP/LP welded rotors. The welded rotors are being developed for modern turbines of coal fired power plants operating above 570 °C. The full–scale weld has been shown to be of good internal quality. Hardness surveys revealed the effects of post weld heat treatment parameters on weld metals and parent steels. Microstructure and precipitation of minor phases in parent materials, heat affected zones and weld metals in the state after the final stress relief annealing have been studied.

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Characterization of fly ash from full-scale demonstration of sorbent injection for mercury control on coal-fired power plants

Fuel Processing Technology ◽

10.1016/j.fuproc.2003.11.019 ◽

2004 ◽

Vol 85 (6-7) ◽

pp. 601-612 ◽

Cited By ~ 27

Author(s):

Constance Senior ◽

C.Jean Bustard ◽

Michael Durham ◽

Kenneth Baldrey ◽

David Michaud

Keyword(s):

Fly Ash ◽

Power Plants ◽

Full Scale ◽

Mercury Control ◽

Sorbent Injection

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Recent advances in microstructure characterization of fried foods: Different frying techniques and process modeling

Trends in Food Science & Technology ◽

10.1016/j.tifs.2021.03.033 ◽

2021 ◽

Author(s):

Jalal Dehghannya ◽

Michael Ngadi

Keyword(s):

Process Modeling ◽

Microstructure Characterization ◽

Recent Advances ◽

Fried Foods

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Assessment of Characteristics of Acid Mine Drainage Treated with Fly Ash

Applied Sciences ◽

10.3390/app11093910 ◽

2021 ◽

Vol 11 (9) ◽

pp. 3910

Author(s):

Saba Shirin ◽

Aarif Jamal ◽

Christina Emmanouil ◽

Akhilesh Kumar Yadav

Keyword(s):

Fly Ash ◽

Acid Mine Drainage ◽

Power Plants ◽

Mine Drainage ◽

Thermal Power ◽

Mineralogical Characterization ◽

Acid Mine ◽

Before And After ◽

Abandoned Coal Mines

Acid mine drainage (AMD) occurs naturally in abandoned coal mines, and it contains hazardous toxic elements in varying concentrations. In the present research, AMD samples collected from an abandoned mine were treated with fly ash samples from four thermal power plants in Singrauli Coalfield in the proximate area, at optimized concentrations. The AMD samples were analyzed for physicochemical parameters and metal content before and after fly ash treatment. Morphological, geochemical and mineralogical characterization of the fly ash was performed using SEM, XRF and XRD. This laboratory-scale investigation indicated that fly ash had appreciable neutralization potential, increasing AMD pH and decreasing elemental and sulfate concentrations. Therefore, fly ash may be effectively used for AMD neutralization, and its suitability for the management of coalfield AMD pits should be assessed further.

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