Gadadhar Sahoo, Kilaru Ravi, Srikanthi Srikant and Pandurangan Saravanan:
Sensitization study and microstructural transformation of 12-% Cr ferritic stainless steel weldments
Ferritic steels, microstructures, HAZ, phase transformations, grain refinement
12-% chromium ferritic steel, which imparts acceptable corrosion resistance by using a low chromium content, has been explored to replace mild steel for structural components exposed to corrosive environments. However, sensitization during welding makes stainless steel vulnerable to intergranular corrosion. In this paper, the sensitization effect and microstructural transformation in heat-affected zone have been studied in single-pass welded steels. The heat-affected zone (HAZ) has been characterized by optical microscopy, elemental X-ray mapping in EPMA, microhardness measurements and double loop electrochemical potentiodynamic reactivation (DLEPR) test. Carbide precipitation is not revealed. Grain refinement in low temperature heat affected zone (LT-HAZ), and the presence of coarser grains along with unresolved martensitic blocks in high temperature heat affected zone (HT-HAZ) are explained using continuous cooling transformation (CCT) diagram and Fe-Cr phase diagram.
In addition, make sure to read these articles:
Updated: Neues Fügeverfahren revolutioniert Stahlverbindungen
Study on the influence of process parameters on mechanical properties and pitting corrosion of dissimilar AISI 304 to AISI 4140 continuous drive friction welds
Characterisation of laser-beam treated stainless steels
German researchers received Niobium Award for a new high strength alloy concept for helically welded steel pipes
Influence of post weld heat treatment on the microstructure and mechanical properties of maraging steel electron beam weldments
New developments in welding technology, profound base to enhance chances
Influence of parent metal mechanical properties on those of the different ultra-high-strength steel electron beam welds
Hot forming - new potentials for innovative manufacturing
Variation in surface residual stress of C-Mn rail with usage
Improvement of fatigue resistance of low-nickel stainless steels for biomedical applications compared to CoCr-alloys
|
top of page
read times
All external sites will open in a new browser.