Effect of microstructure on weld metal toughness
Creators
- 1. GKSS-Forschungszentrum Geesthacht GmbH, Geesthacht-Tesperhude (Germany, F.R.). Inst. fuer Materialforschung
Description
The microstructures and fracture toughnesses (Charpy and CTOD) of three multipas MIG/MAG ferritic welds were studied. MIG/MAG multipass welds were deposited on 30 mm thick pipeline steel StE 445.7 TM (=X65TM) by an industrial robot. The toughness results are discussed on the basis of variations in weld metal microconstituents and non-metallic inclusion distributions. The dual role of the inclusions, as influencing the formation of the acicular ferrite and as being the potential site for the cleavage fracture initiation was investigated. Quantitative chemical analysis of the inclusions revealed that certain elemental coating will promote the acicular ferrite nucleations. The degredation of the CTOD toughness values was explained with the coarser inclusion contents and clustered distribution of inclusions. (orig./MM)
Availability note (English)
Available from GKSS-Forschungszentrum Geesthacht GmbH, Geesthacht-Tesperhude (Germany, F.R.).Additional details
Publishing Information
- Imprint Pagination
- 6 p.
- Report number
- GKSS--90/E/21
Conference
- Title
- 2. international conference on trends in welding research.
- Dates
- 14-18 May 1989.
- Place
- Gatlinburg, TN (USA).
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 22031009
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- FRACTURE PROPERTIES; GAS METAL-ARC WELDING; IMPACT STRENGTH; INCLUSIONS; LOW ALLOY STEELS; METALLOGRAPHY; MICROSTRUCTURE; WELDED JOINTS
- Descriptors DEC
- ALLOYS; ARC WELDING; CARBON ADDITIONS; CRYSTAL STRUCTURE; FABRICATION; IRON ALLOYS; IRON BASE ALLOYS; JOINING; JOINTS; MECHANICAL PROPERTIES; STEELS; WELDING