23 KB439 KB19 KB200020242010Acar, Ahu FahriyeBayrak, MustafaOzturk, Fahrettinletnik:44številka:6str. 391-395ISSN:1580-2949COBISSID:843434URN:URN:NBN:SI:doc-WAYHKMR7enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijebatdiezelski motorjiintermetalna zvezanosilec obročkaEffects of variations in alloy content and machining parameters on the strength of the intermetallic bonding between a diesel piston and a ring carrier| Vpliv sprememb v sestavi zlitine in parametrov obdelave na trdnost intermetalne vezave med dieselskim batom in nosilcem obročka|The intermetallic bonding between an aluminium alloy piston and a cast-iron ring carrier must be able to withstand prolonged exposure to the high-pressure and high-temperature environment of a diesel engine. Weak cohesion may result in the debonding of the ring carrier. Such debonding causes devastating damage to the piston while the engine is in service. Thus, the quality and strength of the intermetallic bonding is very important in piston manufacturing. In the present study, the effects of variations in the alloy content and the machining parameters on the overall strength of the intermetallic bonding are investigated. The defects are determined by ultrasonic inspection. The results indicate that the variation in the alloy content and graphite flakes affects the bond quality adversely. It was determined that the graphite size is a very important parameter. If the graphite size gets smaller, then stronger intermetallic bonding is observed. The graphite accumulation can be resolved by choosing the right amount of alloying elements. The machining process parameters were found to be in effective for the formation of defects on the intermetallic bondingIntermetalma zveza med batom iz aluminijeve zlitine in litoželeznim nosilcem obročka mora dolgo prenašati obremenitev pri visoki temperaturi dieselskega motorja. Šibka kohezija lahko povzroči odstopanje nosilca obročka in povzroči veliko poškodbo pri obratovanju motorja. Zato sta kakovost in trdnost intermetalne zveze zelo pomembni pri izdelavi batov. V tem delu smo raziskali vpliv sprememb v sestavi in parametrov obdelave na trdnost intermetalne zveze. Napake smo odkrili z ultrazvočno kontrolo. Rezultati kažejo, da spremembe v sestavi zlitine in grafitni lističi vplivajo različno na kakovost zveze. Velikost grafitnih lističev je zelo pomemben parameter in pri manjših lističih grafita je trdnost povezave večja. Kopičenje grafita se lahko prepreči s pravo vsebnostjo legirnih elementov. Parametri obdelave ne vplivajo na nastanek napak intermetalne zvezeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije