Papers by Keyword: Alloy Steels

Abstract: Novel technological processes for conceptually new integrated deformation-thermal production of flat rolled stock with enhanced physical-mechanical properties and minimized alloying system have been devised on the basis of recently discovered metallophysical laws of influence, through hot plastic deformation by rolling, upon microstructure-phase conversions and states of steel in metallurgical products.

Abstract: When a Mode I crack in soft steel body grows and reaches near the perpendicular interface of ultra strong steel body, its cohesive zone penetrates into the interface body which influences the crack tip parameter. The paper presents finite element analysis of the cohesive zone across the interface of such elastically matched but strength mismatched bodies in linear elastic regime. Parent alloy steel (ASTM 4340) body and interface maraging steel (MDN 250) body are considered for analysis. The cohesive zone is modeled in accordance with the Dugdale criterion. J integral is evaluated over the path around the interface to examine the effect of cohesive stresses on the crack tip. The results are compared vis-à-vis those obtained from the theoretical model. The two are in very good agreement with each other.