Abstract
In this study the material flow of a newly developed ultra-high-carbon lightweight steel (uhc-steel) with a high amount of aluminum was investigated in an extrusion process. Cylinder compression tests were performed for material characterization and frictional behaviour was determined by using ring compression tests. Numerical simulations were carried to determine the optimal die geometry as well as to calculate the process loads and dominated stresses in the die occurring during the process. Based on the numerical results, an extrusion process was designed and implemented. Experiments showed that the uhc-steel can be formed by extrusion however it is associated with a high wear rate.
Highlights
The demands on nowadays processes are focused on resource efficiency, like in example reducing the process chain, as well as lightweight [1,2].Especially in the automotive sector the lightweight aspect is in focus of actual researches, where in example components of the powertrain are tried to be reduced by weight
Besides the superplasticity at a certain temperature range, the characteristic mechanical properties of uhc-steels were found by low ductility and fracture toughness at ambient temperature, which is unusual for common steels in an intermediate carbon content of 0.1-1 %
On the one hand it stabilizes the existing ferrite phase, but in terms of lightweight and resource efficiency it reduces its weight due to the lower density in comparison with common steel. These uhc-steels show a good formability at high temperatures, they are difficult to process, which results in high die wear [8,9]
Summary
This content has been downloaded from IOPscience. 179 012005 (http://iopscience.iop.org/1757-899X/179/1/012005) View the table of contents for this issue, or go to the journal homepage for more. You may be interested in: Numerical investigation of the effect of friction conditions to increase die life M O Mutlu, C G Guleryuz and Z Parlar Experimental investigation on the performance of an improved equal channel angular pressing die S Surendarnath, K Sankaranarayanasamy and B Ravisankar Prediction of samples failure during severe plastic deformation by multiple extrusion V G Shibakov, D L Pankratov, A P Andreev et al Microstructure evolution during semi continuous equal channel angular extrusion process of interstitial- free steel Bo Yan, Sihai Jiao and Dianhua Zhang Investigation of influence of the outlet channel length of extruder die hydrodynamics of extrusion process R F Sharafutdinov, E R Galimov and B A Snigerev Critical current density investigations of explosively compacted and extrudedpowder-in-tube MgB2 superconductors A G Mamalis, E Hristoforou, I D Theodorakopoulos et al Numerical and Experimental Investigation of the Electromechanical Behavior of REBCO Tapes N C Allen, L Chiesa and M Takayasu Experimental investigation of cylindrical detonation wave S V Dudin, V A Sosikov and S I Torunov
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