A techno-economic evaluation of friction stir welding of DH36 steel
- Toumpis A. ,
- Galloway A. ,
- Cater S. ,
- et al
- Toumpis A. ,
- Galloway A. ,
- Cater S. and
- Molter L.
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A techno-economic assessment study was undertaken with respect to the feasibility of the friction stir welding (FSW) technique for microalloyed DH36 grade shipbuilding steel (0.11%C, 1.48%Mn, 0.02%Nb, 0.02%Al) plates (thickness 6 mm). Single sided friction stir butt welds were fabricated using a PowerStir FSW machine and WRe-polycrystalline cubic BN Q70 FSW tools. Experiments were performed at welding speeds of 100-500 mm/min and rotational speeds of 200-700 rpm. Microstructural observations were conducted in the HAZ and thermomechanically affected zone. Mechanical properties were characterised by transverse tensile tests to determine yield strength and ultimate tensile strength, microhardness measurements and Charpy impact testing. An economic comparator study was employed to assess the costs of FSW in relation to those of submerged arc welding.
10th International Symposium, 20-22 May 2014, Session 2A: Steel I, Paper 02
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