The Weld Heat Affected Zone Structure and Properties of Two Mild Steels, Issue 2 |
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1347°C THERMAL CYCLE 15 MILD 1501 MILD STEEL 788°C THERMAL CYCLE 893°C THERMAL CYCLE Ac₁ and Ac Ac3 point bead-on-plate weld BS15 steel carbon content CHARPY V-NOTCH IMPACT Cranfield ductility electron microscope embrittlement feathery upper bainite ferrite grain ft.lbs FULL RESTRAINT fusion boundary grain growth grain refinement HEAT AFFECTED ZONE heat input high carbon austenite hot rolled impact properties IMPACT STRENGTH input of 108 kilojoules martensite material simulated mechanical properties MICROGRAPH x 700 microstructures MILD STEEL SIMULATED notch toughness OPTICAL MICROGRAPH parent material parent plate partially transformed region peak temperature PHOTO MICROGRAPH plastic deformation post-weld heat treatment proeutectoid ferrite proof stress Properties of BS1501 region of grain shown in Fig simulated weld HAZ STEEL SIMULATED SPECIMENS structure produced submerged arc submerged arc welding temperature of 788°C temperature of 893°C TEMPERATURE OF SIMULATION test piece TESTING TEMPERATURE Thermal simulation transition temperature treatment is shown visible weld HAZ weld HAZ structures welding conditions