The Effects of Annealing on Microstructure and Mechanical Properties of Monolithic Low Carbon Steel and Medium Manganese Steel/low Carbon Steel (Mn8/SS400) Bimetal Composite
Publication Name
Lecture Notes in Mechanical Engineering
Abstract
Metal composites have attracted many interests due to their multi-functionality and excellent overall performance. Medium Mn steels have received much attention as the third-generation high strength steels owing to the good balance between the low material cost and the excellent anti-wear and mechanical properties. Low carbon steels can provide required mechanical properties as base materials at a relatively low cost. In this study, microstructure and mechanical properties of low carbon steel (SS400) and medium manganese steel (Mn8) were performed to evaluate the influence of annealing on Mn8/SS400 bimetal composite. The tensile strength and hardness of SS400 steel decrease, and the ductility of SS400 steel is improved with the increase of annealing temperature, which is attributed to the decreased density of dislocation. In addition, the hardness of Mn8 steel increases after annealing process caused by the phase transformation and grain boundary strengthening. Charpy impact tests of Mn8/SS400 bimetal composite were conducted to investigate the effect of annealing on the toughness at room temperature. The Charpy impact energies slowly drop with the increasing annealing temperatures, which presents the deteriorated toughness of Mn8/SS400 bimetal composite due to the decreased HAGBs and phase transformation.
Open Access Status
This publication is not available as open access
First Page
691
Last Page
702
Funding Sponsor
University of Wollongong