Abstract Close-die forging usually has the goal of shaping a workpiece at reduced forming forces and to set properties for application hand utilizing microstructural changes occurring high homologous temperatures. The evolution property-determining microstructure can be treated as dynamic system during hot forming. It is controlled by temporal temperature velocity fields material points in work...

In the present investigation, an artificial neural network (ANN) model is developed to predict the isothermal hot forging behavior of AlCuMgPb aluminum alloy. The inputs of the ANN are deformation temperature, frictional factor, ram velocity and displacement whereas the forging force, barreling parameter and final shape are considered as the output variable. The developed feed-forward back-prop...

Closed die hot forging of 304L stainless steel is difficult compared to carbon and micro-alloyed steels in terms higher forming force defects. An appropriate combination design process factors including cross-section diameter, initial billet temperature, flash land thickness crucial minimize the without causing any under-filling or folding This paper aims develop an optimized closed-die for lon...

The continuum theory of sintering is used for the analysis of the stability of forging of a cylindrical powder specimen. The constitutive properties of the powder material are assumed to follow a power-law creep relationship. Temperature-coupled linear non-uniform stability analyses are carried out. Stability maps are obtained for forging of copper powder components.

OCB3 is the current version of the OCB authenticated encryption mode which is selected for the third round in CAESAR. So far the integrity analysis has been limited to an adversary making a single forging attempt. A simple extension for the best known bound establishes integrity security as long as the total number of query blocks (including encryptions and forging attempts) does not exceed the...