Role of microstructures on heterogeneous creep behaviour across P91 steel weld joint assessed by impression creep testing

Microstructure across the single-pass activated-tungsten inert gas (A-TIG) weld joint of P91 steel consisting of weld metal, heat affected zone (HAZ) and base metal were characterized using scanning electron microscopy and electron back scattered diffraction (EBSD-SEM). Prior austenite grain size, boundary misorientations angle, coincidence site lattice (CSL) boundaries, substructure size, combination of recovered and deformed structure, M23C6...