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研究生:吳昆達
研究生(外文):Kun-Da Wu
論文名稱:錳對Al-13.9wt.%Mg2Si複合材料微結構與磨耗性質之影響
論文名稱(外文):Effect of Mn on the Microstructure and Wear Properties of Al-13.9wt.%Mg2Si Composites
指導教授:李勝隆李勝隆引用關係
學位類別:碩士
校院名稱:國立中央大學
系所名稱:機械工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2016
畢業學年度:104
語文別:中文
論文頁數:68
中文關鍵詞:Al-Mg2Si複合材料磨耗性質
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本研究藉由微結構觀察、機械性質的量測,探討錳對Al-13.9wt.%Mg2Si (Al-8.8Mg-5.1Si(wt%))複合材料磨耗性質之影響,結果顯示,鑄態未含錳材料中,主要可觀察到初晶α-Al、初晶Mg2Si顆粒與層狀共晶Mg2Si;而在鑄態含錳材料中,可觀察到初晶Mg2Si顆粒與纖維狀共晶Mg2Si。兩者材料經均質化處理後,共晶Mg2Si均有球化現象。
錳元素的添加除了提升鑄態材料硬度與拉伸強度外,且降低了磨耗表面的層剝程度。經均質化處理後,材料不論是否含錳,對硬度並無明顯影響,但兩者材料之延性顯著提升,且於拉伸破斷面皆可觀察到少許凹窩,而磨耗表面皆呈現波浪紋,且含錳材料之波浪紋較密集,顯示含錳材料之磨耗阻抗較高。

With microstructure observation and mechanical test,explore the effect of manganese on wear properties of Al-13.9wt.% Mg2Si (Al-8.8Mg-5.1Si (wt%)) composites. The result indicated that unmodified cast material mainly observed primary α-Al , primary Mg2Si particles and lamellar eutectic Mg2Si.However the cast material with manganese observed finer aluminum grain, primary Mg2Si particles and fibrous eutectic Mg2Si.After homogenization treatment, the eutectic Mg2Si are both transformed into fine spherical shape.

Addition of manganese in Al-13.9wt.% Mg2Si composites not only enhance the hardness and tensile strength of the cast material,but also reduce the wear surface degree of delamination.After homogenization treatment, whether or not with manganese, it didn’t affect the hardness,but significantly enhance the ductility of both materials. The tensile fracture surface are observed little dimple. The wear surface are both rendered wave pattern and the wave pattern of the manganese-containing material is relatively dense,it shows a high abrasion impedance of manganese material.

摘要 I
Abstract II
第一章總目錄 III
表目錄 VI
圖目錄 VII
一.前言 1
二.文獻回顧 3
2.1金屬基複合材料 3
2.2鋁基複合材料 4
2.3 Mg2Si基本性質 5
2.4 Mg2Si複合材料製備方法 7
2.5 Al-Mg2Si複合材料改質處理 8
2.6金屬基複合材料之磨耗特性 13
2.7 Al-Mg-Si之三元相圖 18
2.7.1決定Al-Mg2Si組成於相圖中之位置 21
2.7.2 Al-Mg2Si之冷卻過程 22
三.實驗方法與步驟 24
3.1.1熔配Al-Mg2Si複合材料 24
3.1.2材料成分計算 24
3.1.3材料熔配方法 25
3.2均質化處理 28
3.3微結構觀察與分析 28
3.3.1光學顯微鏡(Optical Microscopy) 28
3.3.2掃描式電子顯微鏡(Scanning Electron Microscopy) 28
3.3.3影像分析(Image J) 28
3.4機械性質分析 29
3.4.1硬度試驗(Hardness, HRF) 29
3.4.2拉伸試驗(Tensile Test) 29
3.4.3磨耗試驗(Wear test) 30
四.結果與討論 32
4.1微結構分析 32
4.1.1光學顯微鏡觀察與各相含量計算 32
4.1.2影像分析 43
4.2機械性質分析 44
4.2.1拉伸破斷面形貌 44
4.2.2拉伸試驗 46
4.2.3磨耗表面形貌 48
4.2.4磨耗試驗 50
五.結論 52
六.參考文獻 53

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