Selecting an aluminum die casting alloy for a particular application often poses a challenge to d... more Selecting an aluminum die casting alloy for a particular application often poses a challenge to designers and engineers. It is often difficult and sometimes not possible to find an alloy that meets all the requirements of the application; and in other times the alloy can be found, but it has a wide specified compositional range, and thus it exhibits a large variation in properties. Therefore, there is always a need to optimize existing alloys or to develop new alloys so that they meet the requirements of a given application. In order to help with the alloy selection and alloy development processes, we developed an electronic database for aluminum die casting alloys – i-Select-Al. This software can help its user to quickly select an alloy for a specific application from a comprehensive list of commercial alloys. Alternatively, it can help its user with the design of a new alloy to meet the requirements of the application. This paper presents a study in optimizing A380 alloy with the ...
... ChangKai (Lance) Wu1, Makhlouf M. Makhlouf 1 1Advanced Casting Research Center; Worcester Pol... more ... ChangKai (Lance) Wu1, Makhlouf M. Makhlouf 1 1Advanced Casting Research Center; Worcester Polytechnic Institute (WPI); 100 Institute Rd. ... This calculation is done by combining a Quench Factor Analysis [1] and the well-known Shercliff and Ashby equations [2]. ...
The grain growth rate at the free surface of a WC-Co material was measured at different high temp... more The grain growth rate at the free surface of a WC-Co material was measured at different high temperatures and the microstructure and elemental composition of the material were characterized at various stages of the grain growth process. It was found that free surface grains grew at an abnormally fast rate, and this fast growth rate coincided with the vaporization of the binder phase from the free surface. It is suggested that this abnormal rate of growth is related to a change in the growth mechanism from interfacial reaction limited growth in the bulk of the material to a surface diffusion rate limited growth at the free surface. It is shown that the contact points between grains provide bridges for atomic transport from the high free-energy regions (the small grains) to the low free-energy regions (the large grains); hence, the contiguity of the material strongly influences the rate of growth. It is believed that vaporization of the binder phase allows for an increased atomic mobi...
Selecting an aluminum die casting alloy for a particular application often poses a challenge to d... more Selecting an aluminum die casting alloy for a particular application often poses a challenge to designers and engineers. It is often difficult and sometimes not possible to find an alloy that meets all the requirements of the application; and in other times the alloy can be found, but it has a wide specified compositional range, and thus it exhibits a large variation in properties. Therefore, there is always a need to optimize existing alloys or to develop new alloys so that they meet the requirements of a given application. In order to help with the alloy selection and alloy development processes, we developed an electronic database for aluminum die casting alloys – i-Select-Al. This software can help its user to quickly select an alloy for a specific application from a comprehensive list of commercial alloys. Alternatively, it can help its user with the design of a new alloy to meet the requirements of the application. This paper presents a study in optimizing A380 alloy with the ...
... ChangKai (Lance) Wu1, Makhlouf M. Makhlouf 1 1Advanced Casting Research Center; Worcester Pol... more ... ChangKai (Lance) Wu1, Makhlouf M. Makhlouf 1 1Advanced Casting Research Center; Worcester Polytechnic Institute (WPI); 100 Institute Rd. ... This calculation is done by combining a Quench Factor Analysis [1] and the well-known Shercliff and Ashby equations [2]. ...
The grain growth rate at the free surface of a WC-Co material was measured at different high temp... more The grain growth rate at the free surface of a WC-Co material was measured at different high temperatures and the microstructure and elemental composition of the material were characterized at various stages of the grain growth process. It was found that free surface grains grew at an abnormally fast rate, and this fast growth rate coincided with the vaporization of the binder phase from the free surface. It is suggested that this abnormal rate of growth is related to a change in the growth mechanism from interfacial reaction limited growth in the bulk of the material to a surface diffusion rate limited growth at the free surface. It is shown that the contact points between grains provide bridges for atomic transport from the high free-energy regions (the small grains) to the low free-energy regions (the large grains); hence, the contiguity of the material strongly influences the rate of growth. It is believed that vaporization of the binder phase allows for an increased atomic mobi...
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