Products tagged with 'friction stir welding'

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Friction Stir Welding – An Advanced Approach To Repair Nuclear Power Plant Components

Product Number: ED22-17314-SG

Author: W.Tang, M.Gussev, X.Chen, T.M Rosseel

Publication Date: 2022

$20.00

The harsh environment such as elevated temperature, radiation, elevated pressure, and potentially corrosive in nuclear reactors compromises material performance. Over time, repair and/or replacement through welding is needed for damaged parts and components. Thus, repair welding is essential to ensure the long-term viability, competitiveness, and safe lifetime extensions of the existing US reactor fleet.

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Reduction of Tool Wear and Loads During Friction Stir Welding of Steel for Pipeline Fabrication

Product Number: MPWT19-14275

Author: Grégory Toguyeni, Ozan Caliskanoglu, Christian Pfeiffer

Publication Date: 2019

$0.00

Friction stir welding procedure development was initiated on steel grades S460 G2+M and S690QL1 in plate wall thicknesses of 10 and 15mm. In order to tackle the challenges of the high mechanical loads on the tool as well as its premature wear, a combination of preheating and optimized weld backing set-up was implemented. The inductive preheating allowed a 28% reduction in welding torque and a significant reduction of the tool wear, particularly during the critical initial plunge of the tool within the base material. A comparison of Mo-based and W-based tool was performed, allowing identifying the W-based tool as having a better combination of high temperature strength and wear resistance. Different backing arrangements and materials were investigated. Ceramic backing inlays were used in order to reduce the heat loss at the root area and maintain an acceptable stirring of this zone to achieve full penetration welds. The welds quality was assessed via metallurgical examination, bend tests, and confirmed the possibility to perform sound full-penetration, one-sided welds. The contribution of the preheating to the process as well as the quality and mechanical properties of the welds will be discussed here.

Products tagged with 'friction stir welding'

Friction Stir Welding – An Advanced Approach To Repair Nuclear Power Plant Components

Reduction of Tool Wear and Loads During Friction Stir Welding of Steel for Pipeline Fabrication

Association for Materials Protection and Performance