介金屬層與熱處理對多孔 A356 鋁合金壓縮性質 的影響

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林宏桀(Hong-Chieh Lin) 查詢紙本館藏

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材料科學與工程研究所

論文名稱

介金屬層與熱處理對多孔 A356 鋁合金壓縮性質的影響
(Effect of interface reaction in A356 matrix and heat treatment on the compressive property of A356 alloys foam)

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摘要(中)

以金屬空心球法製備之多孔鋁，內部孔隙為封閉式結構，具有密度低、
比強度高、抗壓縮性能好之優點。對於多孔材料而言，基地以及空間支架的
選擇對於其壓縮性質非常重要，且兩者相輔相成。本實驗將 Φ2mm316L、
Φ4mm316L、Φ2mm4605、Φ4mm4605 空心鐵球作為空間支架、A356 作為
基地，以重力鑄造法進行澆鑄，製備多孔鋁合金。透過熱處理以及對鐵球進
行改質，藉由微結構分析與壓縮試驗，探討其對壓縮性質的影響。結果顯示，經由 T6 熱處理，改變多孔 A356 合金基地中共晶 Si 之形狀，以及強化相之析出，提高了鋁合金的強度，進而提升壓縮性質。透過對於空心鐵球進行改質，使鐵球表面無法與鋁基地之元素進行反應，降低了鋁基地中富鐵相含量以及介金屬層的形成，改善了 Φ2mm316L 和 Φ2mm4605 之多孔鋁於壓縮過程時的破裂行為。

摘要(英)

The aluminum foam is prepared using the metal hollow sphere method features a closed-cell structure, offered advantages such as low density, high specific strength, and excellent compressive performance. For porous materials, the selection of both the matrix and the space holder is crucial for their compressive properties, and the two components complement each other. In this experiment, Φ2mm 316L, Φ4mm 316L, Φ2mm 4605, and Φ4mm 4605 hollow steel spheres were used as space holder, and A356 was used as the matrix. The aluminum foam was prepared using gravity casting. Through heat treatment and modification of the steel spheres, the effects on compressive properties were investigated using microstructure analysis and compression tests. The results showed that T6 heat treatment changed the shape of eutectic Si in the aluminum foam matrix and enhanced phase precipitation, thereby increasing the strength of the aluminum alloy and improving its compressive properties. By modifying the hollow steel spheres, the surface of the spheres was prevented from reacting with elements in the aluminum matrix, reducing the content of iron-rich phases and the formation of intermetallic layers. This modification improved the fracture behavior of the Φ2mm 316L and Φ2mm 4605 aluminum foam during compression.

關鍵字(中)

★ 多孔鋁
★ A356
★ 能量吸收

關鍵字(英)

★ aluminum foam
★ A356 alloy
★ energy absorption

論文目次

摘要i
Abstract ii
目錄iv
表目錄vii
圖目錄viii
第一章前言與文獻回顧1
1.1 多孔金屬簡介 1
1.2 多孔金屬的製備2
1.2.1 壓力滲透鑄造法2
1.2.2 熔融發泡鑄造法4
1.2.3 傳統粉末冶金法5
1.3 多孔金屬之壓縮性質6
1.4 多孔金屬抗彈之應用9
1.5 A356鋁合金的簡介10
1.5.1 鋁合金分類 10
1.5.2 A356鋁合金簡介11
1.5.3 A356之析出相12
1.5.4 Fe元素對A356鋁合金的影響13
1.5.5 A356鋁合金之熱處理13
1.5.5.1 固溶處理 13
1.5.5.2 淬火14
1.5.5.3 時效處理 14
第二章實驗步驟15
2.1 多孔鋁製作流程16
2.2 密度、孔隙率測量與計算17
2.3 熱處理流程18
2.4 微結構分析18
2.4.1 光學顯微鏡(Optical Microscopy, OM)18
2.4.2 掃描式電子顯微鏡(Scanning Electron Microscopy, SEM)19
2.4.3 X光繞射分析(X-ray diffraction)19
第三章結果與討論19
3.1 多孔鋁之物理性質19
3.2 微結構分析20
3.2.1 光學顯微鏡(OM)20
3.2.1.1 多孔合金之微結構 20
3.2.1.2 空心球之改質22
3.2.1.3 裂紋之傳遞22
3.2.2 掃描式電子顯微鏡(SEM)24
3.2.2.1 富鐵相之成分24
3.2.3 合金X光繞射分析27
3.3 多孔鋁之(壓縮)機械性質28
3.3.1 多孔鋁之壓縮變形行為28
3.3.2 空心球對多孔鋁之機械性質的影響31
3.3.3 改質對多孔鋁之機械性質的影響 32
3.3.4 熱處理對多孔鋁之機械性質的影響33
3.3.5 多孔A356壓縮性質彙整38
第四章結論39
參考文獻 41

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指導教授

李勝隆(Sheng-Long Lee)

審核日期

2024-7-17

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