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标题：Market Opportunities of Some Aluminium Silicon Alloys Materials Obtained by Changing the Casting Process
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作者：George Chirita ; Mioara Chirita ; Daniela Sarpe 等
期刊名称：Risk in Contemporary Economy
电子版ISSN：2067-0532
出版年度：2010
语种：English
出版社：Dunarea de Jos University of Galati
摘要：Fatigue is considered to be the most common mechanism by which engineering components fail,and it accounts for at least 90% of all service failures attributed to mechanical causes. Mechanical properties (tensile strength,tensile strain,Young modulus,etc) as well as fatigue properties (fatigue life) are very dependent on casting method. The most direct effects of casting techniques are on the metallurgical microstructure that bounds the mechanical properties. One of the important variables affected by the casting technique is the cooling rate and the cooling rate is well known that could strongly restrict the microstructure. This present research has done a comparison of fatigue properties of two aluminum silicon alloys obtained by two casting techniques. It was observed that the fatigue life is increasing with 24% for Al12Si and 31% for AL18Si by using centrifugal casting process instead of gravity casting one. This increasing in fatigue life means that a component tailored from materials obtained by centrifugal casting will stay longer in service. In order to identify the best market opportunities for promoting these materials,it was made an estimation of the time required to recover the costs of technology linked to the centrifugal process that will allow obtaining materials with improved properties. The amortization can be achieved by using two different marketing techniques: through the release of the product at the old price and with much longer life of the component which means "same price - longer life",or increasing price,and highlight new product performance which means "higher price - higher properties".
关键词：centrifugal casting;aluminum alloys;aluminum castings;marketing techniques;product lifecycle management