The present study was carried out to investigate the effect of alloying elements and thermo-mechanical treatment (TMT) i.e. hot rolling and forging with different reduction ratios on the hardness (HV) and impact toughness (J) of heat-treated low alloy steels. An understanding of the combined effect of TMT and alloying elements and by measuring hardness, impact toughness, resulting from differen...

D. Arsić, V. Lazić, R. Nikolić, S. Aleksandrović, M. Djordjević, Faculty of Engineering Sciences, University of Kragujevac, Serbia, A. Sedmak, Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia, R. Nikolić, Research Center, University of Žilina, Žilina, Slovakia, R. Bakić, Tutin High School, Serbia In exploitation, the forging dies are exposed to heating up to very high...

By using fusion welding to weld AISI 304 austenitic stainless steel (ASS) and commercial copper, the creation of brittle intermetallic in region that compromises strength joints is primary challenge. However, friction a suitable method for joining these two materials because no obvious defects are produced at joints. The joint significantly influenced by friction-welding-process variables inclu...

The article concern the influences of the novel flash structure with resistance wall on the forming load and die wear during the closed-die forging process. If the geometrical parameters of the resistance wall are not properly designed, the forming load and die wear may be great; this can affect the life of the forging die. Yet, no procedure is known to optimize and decide this flash structure ...

By the analysis on traditional methods for rules of flash metal consume design, the idea of regression mining for flash metal consume design is proposed. Then according to related definitions, we construct a linear regression model. Its parameter estimation method and significant test methods of linear correlation are discussed in detail. We also analyze the method of applying mathematical stat...

endoscopic radial artery harvesting (erah) is a feasible and attractive minimally invasive approach for conduit procurement, however there have been concerns about a potential neurological damage occurring at the harvest limb site secondary to injury of the radial nerve during endoscopic harvesting. we present a case of erah in which we evaluated intraoperatively the characteristics of radial n...

In a closed die forging process, it is impossible to form complex shapes in one stage, and thus it becomes necessary to use preform dies. In the present study, Backward Deformation Method and FE simulation via ABAQUS software has been used in order to design preform die of the H-shaped parts. In the Backward Deformation Method, the final shape of the part is considered as a starting point and u...

The forging of metals is among the oldest working techniques—about 6000 years old [...]

Complex shapes are widely used to design products in several industries such as aeronautics, automotive and domestic appliances. Several variations of their curvatures and orientations generate difficulties during their manufacturing or the machining of dies used in moulding, injection and forging. Analysis of several parts highlights two levels of difficulties between three types of shapes: pr...