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Manufacture and Performance of Welds in Creep Strength Enhanced Ferritic Steels

Electric Power Research Institute, Charlotte, NC 28262, USA
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Materials 2019, 12(14), 2257; https://doi.org/10.3390/ma12142257
Received: 3 June 2019 / Revised: 8 July 2019 / Accepted: 11 July 2019 / Published: 13 July 2019
(This article belongs to the Special Issue Recent Developments in Non-Conventional Welding of Materials)
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Abstract

Welding is a vital process required in the fabrication of ‘fracture critical’ components which operate under creep conditions. However, often the procedures used are based on ‘least initial cost’. Thus, it is not surprising that in many high energy applications, welds are the weakest link, i.e., damage is first found at welds. In the worst case, weld cracks reported have had catastrophic consequences. Comprehensive Electric Power Research Institute (EPRI) research has identified and quantified the factors affecting the high temperature performance of advanced steels working under creep conditions. This knowledge has then been used to underpin recommendations for improved fabrication and control of creep strength enhanced ferritic steel components. This review paper reports background from this work. The main body of the review summarizes the evidence used to establish a ‘well engineered’ practice for the manufacture of welds in tempered martensitic steels. Many of these alternative methods can be applied in repair applications without the need for post-weld heat treatment. This seminal work thus offers major benefits to all stakeholders in the global energy sector. View Full-Text
Keywords: steel; weld; high temperature; creep; fracture; advanced methods steel; weld; high temperature; creep; fracture; advanced methods
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Parker, J.; Siefert, J. Manufacture and Performance of Welds in Creep Strength Enhanced Ferritic Steels. Materials 2019, 12, 2257.

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