博碩士論文 91323029 完整後設資料紀錄

DC 欄位 語言
DC.contributor機械工程學系zh_TW
DC.creator謝孟雄zh_TW
DC.creatorMeng-Hsiung Hsiehen_US
dc.date.accessioned2004-7-8T07:39:07Z
dc.date.available2004-7-8T07:39:07Z
dc.date.issued2004
dc.identifier.urihttp://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.descriptionNational Central Universityen_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.abstractThe 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.subjectCu含量zh_TW
DC.subjectMg 含量zh_TW
DC.subject機械性質zh_TW
DC.subjectmechanical propertiesen_US
DC.subjectCu contenten_US
DC.subjectMg contenten_US
DC.titleMg、Cu含量對Al-14.5Si-Cu-Mg合金機械性質之影響zh_TW
dc.language.isozh-TWzh-TW
DC.titleEffect of Mg、Cu content on mechanical properties of Al-14.5Si-Cu-Mg alloysen_US
DC.type博碩士論文zh_TW
DC.typethesisen_US
DC.publisherNational Central Universityen_US

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