不同輥軋及退火製程對AA5052-H32鋁陽極皮膜生長的影響

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姓名

吳奕德(Yi-De Wu) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

不同輥軋及退火製程對AA5052-H32鋁陽極皮膜生長的影響
(The affect of AAO film in AA5052-H32 during different rolling and annealing procedure)

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摘要(中)

鋁合金因其比強度高、耐腐蝕及表面處理特性佳，現今已廣泛的應用在各個領域，如3C製品、汽車零件等…。
不同製程下的鋁合金，會造成其微結構有所差異，進而產生不同的織構(texture)情形，如輥軋、擠製等…，但在進行不同階段退火製程後，加工下所產生的差排也會有消失的現象，微結構進而產生回復、再結晶及晶粒生長等情形，因而造成晶粒高低角度變化的現象。
鋁鎂合金屬擁有加工硬化的特性，由於鎂的疊差能(stacking fault energy)較鋁低，再加工時會有阻擋差排爬升(climb)及滑移(cross slip)的現象，因此，隨著加工量的上昇，而使得材料的強度有逐漸上升的趨勢。
本實驗中使用AA5052-H32，觀察鋁合金在不同加工量及退火條件下，基地結構對陽極氧化膜(Anodic Aluminum Oxide film, AAO film)的影響，並擷取陽極時電壓與時間變化曲線(V-t curve)來觀察鋁合金試片在陽極處理後所造成的差異，進而討論陽極皮膜的特性。由實驗結果發現到，在經過加工及退火，陽極膜的厚度及色澤皆有改變。對陽極膜進行化學成分分析後，發現製程對氧化膜的組成也有影響。由此可發現到，隨著前處理的不同，陽極膜內的成分以及孔洞排列性皆會改變，進而影響其厚度以及光學性質。

摘要(英)

As the high specific strength and high corrosion resistance, aluminum alloy is well used in many industry field, ex: 3C product and auto mobile component.
Aluminum alloy have different microstructure and texture in different procedure, like rolling or extrusion processes, the dislocations bring from the procedure will disperse in different anneal condition, to following the recovery, recrystallization and grain growth, make the grain boundaries to form high angle or low angle.
Aluminum-Magnesium alloy possession a work hardening property, because of the stacking fault energy in magnesium is lower than aluminum, it’s will bind the dislocations and block to cross slip or climb, therefore, the more working ratio, the more strength.
This study using the 5052-H32 as the material, observation the relationship between substrate and AAO film in different working and annealing condition, moreover, monitoring the V-t curve to observation the AAO properties. When annealing and rolling condition changed, the film thickness and color will different, following affected the AAO film chemical composition.

關鍵字(中)

★ 輥軋
★ 退火
★ 陽極皮膜

關鍵字(英)

★ rolling
★ annealing
★ AAO film

論文目次

摘要.....................................................I
Abstract................................................II
第一章前言..............................................1
第二章文獻回顧..........................................2
2-1 輥軋(rolling)簡述....................................2
2-2 織構(texture)........................................2
2-2-1 輥軋及退火的織構...................................2
2-2-2 織構對陽極皮膜的影響...............................5
2-2 鎂對結構造成的影響...................................8
2-2-1 添加鎂對鋁合金的影響...............................9
2-2-2 加工溫度對鋁鎂合金的影響...........................9
2-3 差排與高低角度晶界..................................12
2-3-1 差排(dislocation).................................12
2-3-2 差排圈(dislocation loop)與差排胞(dislocation cell)14
2-3-3 高低角度晶界 ......................................15
2-4 表面處理............................................19
2-4-1 陽極處理..........................................19
2-4-3 陽極皮膜的種類....................................20
2-4-4 多孔型陽極皮膜的生成機制..........................20
2-4-2 鋁陽極皮膜的應用..................................21
2-4-5 鋁陽極皮膜生成的電壓-時間曲線(V-t curve)..........22
2-4-6 鎂在鋁中對陽極電壓時間曲線之影響..................24
2-4-7 陽極電流對鋁鎂陽極皮膜之影響......................25
第三章實驗方法與步驟...................................29
3-1 實驗材料............................................29
3-2 實驗儀器............................................29
3-3 實驗步驟............................................30
第四章結果與討論.......................................34
4-1 輥軋對基材產生的變化................................34
4-1-1 輥軋對晶粒型態的影響..............................34
4-1-2 退火時間對晶粒型態的影響..........................35
4-1-3 輥軋對差排的影響..................................39
4-1-4 輥軋及退火對晶界角度(grain boundary angle)的影響..39
4-1-5 輥軋及退火對導電度的影響..........................40
4-1-6 輥軋及退火對硬度的影響............................41
4-2 輥軋及退火對陽極的影響..............................42
4-2-1 鎂含量對陽極電壓-時間曲線的影響...................42
4-2-2 輥軋對陽極電壓-時間曲線的影響.....................43
4-2-3 差排對陽極處理的影響..............................45
4-2-4 退火對陽極電壓-時間曲線的影響.....................46
4-2-5 陽極皮膜色澤的變化................................49
4-2-6 長時間陽極對陽極皮膜的影響........................49
第五章結論.............................................51
參考文獻................................................52
附錄....................................................56

參考文獻

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指導教授

施登士(Teng-Shih Shih)

審核日期

2009-7-30

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