The Study of Trace Be on Al-11%Si and 319 Aluminum Casting Alloys Containing 1pct Iron Impurity
博士 === 國立中央大學 === 機械工程研究所 === 88 === The studies of present works are (I) the effect of various contents of Be on Al-11%Si aluminum casting alloy and (II) the effect of 0.1% Be on 319 aluminum casting alloy with various solution treatment temperatures. Both contain 1pct iron impurity. It may summa...
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ndltd-TW-088NCU004890042016-07-08T04:22:53Z http://ndltd.ncl.edu.tw/handle/94839304138228235070 The Study of Trace Be on Al-11%Si and 319 Aluminum Casting Alloys Containing 1pct Iron Impurity 微量Be對含鐵Al-11%Si及319鑄造用鋁合金性質之影響研究 Shan-Noon Yie 易善穠 博士 國立中央大學 機械工程研究所 88 The studies of present works are (I) the effect of various contents of Be on Al-11%Si aluminum casting alloy and (II) the effect of 0.1% Be on 319 aluminum casting alloy with various solution treatment temperatures. Both contain 1pct iron impurity. It may summarize the conclusion as: (I) The effect of various contents of Be on Al-11%Si aluminum casting alloy: Increasing the content of Be shortens the lengths of iron-rich phase and flake silicon. The content of Be more than 0.2% makes the morphology of Chinese script iron-rich phase transformed complete. Increasing the content of Be icreases the ductility of Al-11%Si aluminum casting alloy containing 1pct iron impurity. Increasing the content of Sr do not affect the transformation of Chinese script iron-rich phase from needle iron-rich phase in Al-11%Si aluminum casting alloy. (II) The effect of 0.1% Be on 319 aluminum casting alloy with various solution treatment temperatures: Be element dispersed in aluminum matrix will cluster silicon particle and iron-rich phase. But the clustering ability of thermal is superior to Be. The same as that in Al-11%Si aluminum casting alloy, Be transforms needle iron-rich phase into Chinese script iron-rich phase, not affected by the presence of elements of Cu, Mg, etc. Increasing the solution temperature, the precipitation temperature will be promoted and the precipitation quantity will be increased by the pre-existing Be as inoculat in the matrixe. Be stablizes the dual Al-CuAl2 eutectic phase, promoting the eutectic temperature about 7-9℃. Needle iron-rich phase broken by thermal is at about 510℃ and the connection of Chinese script iron-rich phases is at about 530℃. To avoid the dumb of ductility by the ultra-fine structure, it is suggested that solution temperature of 319 aluminum casting alloy is below 510℃ when without Be, otherwise, below 520℃ when with Be. Sheng-Long Lee 李勝隆 1999 學位論文 ; thesis 76 zh-TW |
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博士 === 國立中央大學 === 機械工程研究所 === 88 === The studies of present works are (I) the effect of various contents of Be on Al-11%Si aluminum casting alloy and (II) the effect of 0.1% Be on 319 aluminum casting alloy with various solution treatment temperatures. Both contain 1pct iron impurity. It may summarize the conclusion as:
(I) The effect of various contents of Be on Al-11%Si aluminum casting alloy:
Increasing the content of Be shortens the lengths of iron-rich phase and flake silicon. The content of Be more than 0.2% makes the morphology of Chinese script iron-rich phase transformed complete. Increasing the content of Be icreases the ductility of Al-11%Si aluminum casting alloy containing 1pct iron impurity. Increasing the content of Sr do not affect the transformation of Chinese script iron-rich phase from needle iron-rich phase in Al-11%Si aluminum casting alloy.
(II) The effect of 0.1% Be on 319 aluminum casting alloy with various solution treatment temperatures:
Be element dispersed in aluminum matrix will cluster silicon particle and iron-rich phase. But the clustering ability of thermal is superior to Be. The same as that in Al-11%Si aluminum casting alloy, Be transforms needle iron-rich phase into Chinese script iron-rich phase, not affected by the presence of elements of Cu, Mg, etc. Increasing the solution temperature, the precipitation temperature will be promoted and the precipitation quantity will be increased by the pre-existing Be as inoculat in the matrixe. Be stablizes the dual Al-CuAl2 eutectic phase, promoting the eutectic temperature about 7-9℃. Needle iron-rich phase broken by thermal is at about 510℃ and the connection of Chinese script iron-rich phases is at about 530℃. To avoid the dumb of ductility by the ultra-fine structure, it is suggested that solution temperature of 319 aluminum casting alloy is below 510℃ when without Be, otherwise, below 520℃ when with Be.
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author2 |
Sheng-Long Lee |
author_facet |
Sheng-Long Lee Shan-Noon Yie 易善穠 |
author |
Shan-Noon Yie 易善穠 |
spellingShingle |
Shan-Noon Yie 易善穠 The Study of Trace Be on Al-11%Si and 319 Aluminum Casting Alloys Containing 1pct Iron Impurity |
author_sort |
Shan-Noon Yie |
title |
The Study of Trace Be on Al-11%Si and 319 Aluminum Casting Alloys Containing 1pct Iron Impurity |
title_short |
The Study of Trace Be on Al-11%Si and 319 Aluminum Casting Alloys Containing 1pct Iron Impurity |
title_full |
The Study of Trace Be on Al-11%Si and 319 Aluminum Casting Alloys Containing 1pct Iron Impurity |
title_fullStr |
The Study of Trace Be on Al-11%Si and 319 Aluminum Casting Alloys Containing 1pct Iron Impurity |
title_full_unstemmed |
The Study of Trace Be on Al-11%Si and 319 Aluminum Casting Alloys Containing 1pct Iron Impurity |
title_sort |
study of trace be on al-11%si and 319 aluminum casting alloys containing 1pct iron impurity |
publishDate |
1999 |
url |
http://ndltd.ncl.edu.tw/handle/94839304138228235070 |
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