In the present paper, the possibility of auto weight reduction by replacing conventional material components with low cost MMC (metal matrix composite)- components has been examined. A brake drum for automotive applications was selected as it does not require the high toughness and fracture elongation values of other structural components which are difficult to obtain in MMC forgings. Among the MMC candidates to replace cast iron, 359/SiC/20p appears most favorable in reducing temperature during braking. The forging trials were performed in working conditions similar to the unreinforced aluminium alloy ones; the forged part have shown no macroscale defects. An analysis of the forging have shown that the damage levels in the flash region and in most of the component corners are higher than in the as-cast material. This should be attributed to the stress and strain states in such regions. Most damaged zones are located out of the finished brake drum and as a consequence are removed by machining. A more accurate forging design and a proper definition of the forging conditions are required for a low cost manufacturing of defect-free MMC brake drum component.
Forging of a MMC for an automotive component
Das Schmieden eines Metallmatrixverbunds für ein Autoteil
Metallurgical Science and Technology ; 14 , 1 ; 13-19
1996
7 Seiten, 7 Bilder, 15 Quellen
Aufsatz (Zeitschrift)
Englisch
Automotive forging component design
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