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Alloy Development for Sustainable Ca...

Moodispaw, Michael P.,

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Alloy Development for Sustainable Casting of Low-Carbon Aluminum Alloys /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Alloy Development for Sustainable Casting of Low-Carbon Aluminum Alloys // Michael P Moodispaw.
作者:	Moodispaw, Michael P.,
面頁冊數:	1 electronic resource (213 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
Contained By:	Dissertations Abstracts International86-04B.
標題:	Materials science. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31693959
ISBN:	9798384467991

Alloy Development for Sustainable Casting of Low-Carbon Aluminum Alloys /
Moodispaw, Michael P.,

Alloy Development for Sustainable Casting of Low-Carbon Aluminum Alloys /Michael P Moodispaw. - 1 electronic resource (213 pages)

Source: Dissertations Abstracts International, Volume: 86-04, Section: B.

The transportation sector is responsible for a significant contribution of global carbon emissions. Recent efforts to reduce carbon emissions have been focused on reducing the weight of all types of vehicles to improve efficiency. Aluminum alloys are widely used due to a combination of low density and excellent mechanical and corrosion properties. However, aluminum alloys contain high embodied emissions due to the energy intensive refinement process from bauxite ore. Recycled aluminum, called secondary aluminum, only requires around 5% of the energy needed to produce aluminum from bauxite ore (primary aluminum). Current recycling practices result in significant amounts of elemental impurities in secondary aluminum alloys, significantly decreasing their mechanical properties and limiting their uses in the transportation industry. The control of impurities during solidification ultimately controls the achievable mechanical properties of casting alloys, which are the most widely used. Thermodynamic calculations using the CALPHAD (calculation of phase diagrams) method were used to predict the effect of common impurities during solidification of secondary aluminum alloys. CALPHAD was also used to predict the effect of potential modifying elements. Lab-scale casting experiments were performed to evaluate the thermodynamic predictions via microstructure observations using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM) techniques. Control methods for favorable microstructures were developed. From the results, a secondary structural alloy composition was chosen for production-scale experiments using high pressure die casting (HPDC). The results showed that Al-Si based alloys with Fe impurity can be effectively modified by Mn and Sr additions, and the effects of Mg and Cu impurities can be mitigated by Ce additions, leading to property improvements. The investigations also showed novel Al-Ce based alloys can be manufactured using scrap material with high impurity contents without a loss in mechanical properties.

English

ISBN: 9798384467991Subjects--Topical Terms:

543314
Materials science.
Subjects--Index Terms:

Casting alloys

Alloy Development for Sustainable Casting of Low-Carbon Aluminum Alloys /
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520 $a The transportation sector is responsible for a significant contribution of global carbon emissions. Recent efforts to reduce carbon emissions have been focused on reducing the weight of all types of vehicles to improve efficiency. Aluminum alloys are widely used due to a combination of low density and excellent mechanical and corrosion properties. However, aluminum alloys contain high embodied emissions due to the energy intensive refinement process from bauxite ore. Recycled aluminum, called secondary aluminum, only requires around 5% of the energy needed to produce aluminum from bauxite ore (primary aluminum). Current recycling practices result in significant amounts of elemental impurities in secondary aluminum alloys, significantly decreasing their mechanical properties and limiting their uses in the transportation industry. The control of impurities during solidification ultimately controls the achievable mechanical properties of casting alloys, which are the most widely used. Thermodynamic calculations using the CALPHAD (calculation of phase diagrams) method were used to predict the effect of common impurities during solidification of secondary aluminum alloys. CALPHAD was also used to predict the effect of potential modifying elements. Lab-scale casting experiments were performed to evaluate the thermodynamic predictions via microstructure observations using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM) techniques. Control methods for favorable microstructures were developed. From the results, a secondary structural alloy composition was chosen for production-scale experiments using high pressure die casting (HPDC). The results showed that Al-Si based alloys with Fe impurity can be effectively modified by Mn and Sr additions, and the effects of Mg and Cu impurities can be mitigated by Ce additions, leading to property improvements. The investigations also showed novel Al-Ce based alloys can be manufactured using scrap material with high impurity contents without a loss in mechanical properties.
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650 4 $a Engineering. $3 586835
650 4 $a Physical chemistry. $3 1981412
653 $a Casting alloys
653 $a Recycling
653 $a Aluminum alloys
653 $a Intermetallic formation
690 $a 0794
690 $a 0537
690 $a 0494
710 2 $a The Ohio State University. $b Materials Science and Engineering. $e degree granting institution. $3 3817268
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