An optimal forward extrusion device proposed for numerical and experimental analysis of materials tribological properties corresponding to bulk forming processes

摘要: Abstract This paper concerns the design and analysis of an optimal forward extrusion die used in order to characterize identify tribological properties corresponding real contact conditions, which occur during bulk plastic forming processes. The main idea is find friction parameters by a two-step inverse method applied finite element model process. A compression test, using special dumbbell specimen, also performed describe correctly rheological behaviour material. Experimental upsetting tests are carried out for AA5083 aluminium alloy coefficients identified only recorded load–stroke curves. surfaces, validation obtained results influence on local mechanical microstructural material via tribometer tests, micro-hardness measurements EBSD characterisation.