The directional solidification study of A356 aluminum alloy and Al-Si eutectic alloy
碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 102 === Directional solidification technique applied to investigate the dendrite alloy segregation and the phase identification in multiple phases co-precipitation. Because the large size dendrite could form in directional solidification which would provide large s...
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ndltd-TW-102NSYS51590512019-05-15T21:32:37Z http://ndltd.ncl.edu.tw/handle/j2n4ue The directional solidification study of A356 aluminum alloy and Al-Si eutectic alloy A356鋁合金及Al-Si共晶合金的方向性凝固研究 Chia-Sin Lin 林家新 碩士 國立中山大學 材料與光電科學學系研究所 102 Directional solidification technique applied to investigate the dendrite alloy segregation and the phase identification in multiple phases co-precipitation. Because the large size dendrite could form in directional solidification which would provide large scale to investigate the dendrite segregation from dendrite center region to edge region. For the eutectic type alloys, several phases formed together and have the difficulty to identify these fine phases. These alloys could solidify under slower directional solidification condition and form larger phase. A356 aluminum alloy and add 1 wt.%Mn alloy were applied in this study. The influence of thermal gradient, extruding rate and chemical composition to microstructure were investigated. In A356 aluminum alloy and it add 1wt.% Mn we found the Al dendrite is larger than nature cooling then it is good to carry out quantitative analysis, we also can find the Al dendrite grow paralleled with heat in A356 but not in A356 with 1wt.% Mn, and the precipitate will convert to fibrous from plates when the extruding rate reduced. When A356 alloy addition 1 wt.% Mn the Al5FeSi IMC would convert to Al15(Fe,Mn)3Si2. We also take Al-Si and Al-Si-Cu eutectic system, due to the current temperature parameter, the microstructure is not as expected. Because the lower thermal gradient caused the lower cooling rate, and generated ageing behavior. Thus the change of extruding rate is not affecting the microstructure. Ker-Chang Hsieh 謝克昌 2014 學位論文 ; thesis 90 zh-TW |
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Others
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碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 102 === Directional solidification technique applied to investigate the dendrite alloy segregation and the phase identification in multiple phases co-precipitation. Because the large size dendrite could form in directional solidification which would provide large scale to investigate the dendrite segregation from dendrite center region to edge region. For the eutectic type alloys, several phases formed together and have the difficulty to identify these fine phases. These alloys could solidify under slower directional solidification condition and form larger phase.
A356 aluminum alloy and add 1 wt.%Mn alloy were applied in this study. The influence of thermal gradient, extruding rate and chemical composition to microstructure were investigated. In A356 aluminum alloy and it add 1wt.% Mn we found the Al dendrite is larger than nature cooling then it is good to carry out quantitative analysis, we also can find the Al dendrite grow paralleled with heat in A356 but not in A356 with 1wt.% Mn, and the precipitate will convert to fibrous from plates when the extruding rate reduced. When A356 alloy addition 1 wt.% Mn the Al5FeSi IMC would convert to Al15(Fe,Mn)3Si2.
We also take Al-Si and Al-Si-Cu eutectic system, due to the current temperature parameter, the microstructure is not as expected. Because the
lower thermal gradient caused the lower cooling rate, and generated ageing behavior. Thus the change of extruding rate is not affecting the microstructure.
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author2 |
Ker-Chang Hsieh |
author_facet |
Ker-Chang Hsieh Chia-Sin Lin 林家新 |
author |
Chia-Sin Lin 林家新 |
spellingShingle |
Chia-Sin Lin 林家新 The directional solidification study of A356 aluminum alloy and Al-Si eutectic alloy |
author_sort |
Chia-Sin Lin |
title |
The directional solidification study of A356 aluminum alloy and Al-Si eutectic alloy |
title_short |
The directional solidification study of A356 aluminum alloy and Al-Si eutectic alloy |
title_full |
The directional solidification study of A356 aluminum alloy and Al-Si eutectic alloy |
title_fullStr |
The directional solidification study of A356 aluminum alloy and Al-Si eutectic alloy |
title_full_unstemmed |
The directional solidification study of A356 aluminum alloy and Al-Si eutectic alloy |
title_sort |
directional solidification study of a356 aluminum alloy and al-si eutectic alloy |
publishDate |
2014 |
url |
http://ndltd.ncl.edu.tw/handle/j2n4ue |
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