NDLI: The effect of thermal history during fabrication on the mechanical properties of weldments in grade 91 creep resistant steel

Content Provider	Springer Nature Link
Author	Abson, D. J. Rothwell, J. S.
Copyright Year	2013
Abstract	The creep resistant steel, grade 91, is in widespread use for steam plants. However, poor cross–weld creep strength of welded joints compared with that of the parent material has become a major concern for many operators. Creep cracking in the more refined regions of the heat affected zone, known as type IV cracking, is the main failure mechanism associated with poor cross–weld creep performance. The effect of unplanned or unusual heat treatments (HTs) or lack of HT during fabrication of boiler components on the mechanical performance of weldments in P91 has been investigated. Reduced pressure electron beam welding equipment was used to produce through thickness melt runs in 28-mm pipe, in order to produce a HAZ that is free of reheated regions. The HTs investigated were shown to have a negligible effect on the cross–weld creep rupture life at 630 °C. The implications of these findings for industry are discussed.
Starting Page	913
Ending Page	924
Page Count	12
File Format	PDF
ISSN	00432288
Journal	Welding in the World
Volume Number	57
Issue Number	6
e-ISSN	18786669
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-09-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fabrication Creep HAZ toughness PWHT Boilers Metallic Materials EB welding Theoretical and Applied Mechanics Type IV Continuum Mechanics and Mechanics of Materials Grade 91 CSEF
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Metals and Alloys Mechanical Engineering

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