Abstract
A microgrid was inscribed on the electro-chemically polished 347 austenitic stainless steels specimen surface and creep tests were carried out in argon atmosphere. B-added steel exhibited lower total creep strain and grain boundary sliding rates than those in the B-free steel. The contribution of the sliding strain to the total creep strain was found more in the B-free steel than that in B-added steel. Creep cavity nucleation and growth in the steel were suppressed with B addition, resulting in higher creep strength coupled with higher creep ductility in B-added steel.
