Market Opportunity of Some Aluminium Silicon Alloys Materials through Changing the Casting Process
Datum
2012Autor
Chiriţă, George
Chiriţă, Mioara
Soares, Delfim
Silva, Filipe Samuel
Metadata
Zur LanganzeigeZusammenfassung
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 which is well known to strongly restrict the microstructure. In
the present research has been 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. This increasing in fatigue life means that a component tailored
from materials obtained by centrifugal casting will stay longer in service. It was made an
estimation of the time required to recover the costs of technology in order to use the
centrifuge process that will allow to obtain 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, by highlighting new product
performance which means "higher price - higher properties".
Collections
- 2012 fascicula1 nr2 [19]