Abstract
This article deals with the analysis and comparison of the conditions for solid state welding during extrusions by means of numerical simulation. Numerical simulations made on four different matrices, such as square die without integrated extrusion and equal channel angular pressing (iECAP), porthole die whit one and four square profile. Maximum volume and distribution of effective strain, strain rate and shear stress was analyzing. The results show that during cold molding of chips there is mutual deformations of chips, which are rearranged and mechanically crimped. In the first phase of pressing occurs complete elimination of porosity. The square die with iECAP was extrusion force is 30% higher than porthole die. Maximumeffective strain was calculated for the porthole die whit four square profile.
Highlights
Producing more and more products from light weight non ferous materials mainly based on Al, Ti, Mg, Ni and Be, the manufacture of which there is a considerable amount of waste
To a continuous process forward fit is possible to implement a number of methods such as equal channel angular pressing (ECAP) [7,8,9,10,11,12,13,14], twist extrusion (TE) [15,16,17], or friction stir processing called as KOBO [18, 19]
Numerical simulations made on four different matrices, such as square die without integrated extrusion and equal channel angular pressing, porthole die whit one and four square profile
Summary
Producing more and more products from light weight non ferous materials mainly based on Al, Ti, Mg, Ni and Be, the manufacture of which there is a considerable amount of waste. Due to the implementation of a new technologies operation, such as SPD (severe plastic deformation), into forward extrusion process. They are in the molding process to ensure a high plastic strain by simple shear.
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