| DC 欄位 |
值 |
語言 |
| DC.contributor | 機械工程學系 | zh_TW |
| DC.creator | 謝孟雄 | zh_TW |
| DC.creator | Meng-Hsiung Hsieh | en_US |
| dc.date.accessioned | 2004-7-8T07:39:07Z | |
| dc.date.available | 2004-7-8T07:39:07Z | |
| dc.date.issued | 2004 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=91323029 | |
| dc.contributor.department | 機械工程學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 本文是以Al-Si-Cu-Mg合金為基礎，分別添加不同含量的Mg、Cu原子以研究此二種元素含量對Al-14.5Si-Cu-Mg合金機械性質的影響。研究中使用光學顯微鏡、電子微探儀(EPMA)、導電度量測(%IACS)、熱差掃描分析(DSC)及電子顯微鏡(SEM)來觀察材料微結構的變化。實驗結果顯示，增加合金中之Mg含量或減少Cu含量(Mg/Cu比增加)，將促使針狀β-Al5FeSi富鐵相轉變成文字型Al8Mg3FeSi6相，若Mg含量高於固溶溫度下之固溶度，將使固溶淬火後基地中Mg、Cu原子比例下降，進而減少人工時效後強化相之析出量及硬度之提升幅度，但拉伸強度及延伸率將因針狀β-Al5FeSi富鐵相數量之減少而有較佳之表現；Cu含量減少雖造成合金T6熱處理後析出強化的效果變差，但拉伸強度及延伸率因針狀β-Al5FeSi富鐵相轉變為文字型Al8Mg3FeSi6相而有所提升。 | zh_TW |
| dc.description.abstract | The effect of Mg、Cu content on mechanical properties of Al-14.5Si- 4.5Cu alloys were investigated. Optical microscopy (OM)， electron probe X-ray microanalyzer (EPMA), electrical conductivity meter (%IACS), differential scanning calorimeter (DSC) and scanning electron microscopy (SEM) were used to monitor the variation of microstructure . The results show that increasing Mg content contribute to transformation of β-Al5FeSi needles into the Al8Mg3FeSi6 compacted Chinese script phase. That Mg content exceeds the solubility under solution temperature lowers the percentage of Mg、Cu atoms dissolving into the Al-matrix during solution treatment. This reduces amounts of precipitates and increasement of hardness after artificial ageing, otherwise, tensile properties perform better due to reduction of the number of β-Al5FeSi needles. Decreasing Cu content reduces the effect of precipitation hardening, but tensile properties are promoted due to the transformation of β-Al5FeSi needles into the Al8Mg3FeSi6 compacted Chinese script phase. | en_US |
| DC.subject | Cu含量 | zh_TW |
| DC.subject | Mg 含量 | zh_TW |
| DC.subject | 機械性質 | zh_TW |
| DC.subject | mechanical properties | en_US |
| DC.subject | Cu content | en_US |
| DC.subject | Mg content | en_US |
| DC.title | Mg、Cu含量對Al-14.5Si-Cu-Mg合金機械性質之影響 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Effect of Mg、Cu content on mechanical properties of Al-14.5Si-Cu-Mg alloys | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |