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題名 | 鋁鋰合金銲接熱影響區性質之研究=Characteristic Studies of Heat Affected Zones in Aluminum--Lithium Alloy Weld |
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作者 | 陳明祥; 陳建發; Chen, Ming-hsiang; Chen, Chien-fa; |
期刊 | 技術學刊 |
出版日期 | 20001200 |
卷期 | 15:4 2000.12[民89.12] |
頁次 | 頁667-672 |
分類號 | 472.14 |
語文 | chi |
關鍵詞 | 鋁鋰合金; 熱影響區; 微差掃瞄卡計; 2091-T3; Heat affected zone; Differential scanning calorimetry; |
中文摘要 | 本文利用Gleeble模2091-T3鋁鋰合金熱影響區之顯微組織,並利用微差掃瞄卡計、微硬度試驗、拉伸試驗及光學顯微鏡觀察,探討熱影響區顯微組織及機械性質與顯微組織間之關係。實驗結果顯示,2091-T3鋁鋰合金熱影響區之硬度及抗拉強度降低,發生於熱循環峰值溫度250℃與450℃兩個區域。2091鋁鋰合金主要之析出強化相為δ相與S’相。峰值溫度250℃區域強度降低之原因為銲接加熱過程中GP zones及部分δ’相溶解。峰值溫度450℃區域強度降低之原因則為銲接加熱過程中GP zones及δ’相溶解與S’相析出及部份再溶解。 |
英文摘要 | The object of this study was to investigate the microstructure and properties of 2091-T3 aluminum alloy weld heat affected zones (HAZ). The variations of material properties in weld HAZ are generally attributed to the change in the microstructure by the welding thermal cycle during welding fabrication. The HAZ microstructures of 2091-T3 aluminum alloy were simulated by Gleeble. The relationship between mechanical properties and microstructure was investigated by means of differential scanning calorimetry (DSC)、microhardness testing、tensile testing, and optical microscopic examination. The experimental results indicated that microhardness and ultimate tensile strength weld HAZ of 2091-T3 aluminum-lithium alloy decrease in the regions of peak temperature, 250℃ and 450℃. In the region of peak temperature, 250℃, the reduction of tensile strength was caused by GP zones and partial δ’phase dissolution. In the region of peak temperature 450℃, the reduction of tensile strength was caused by GP zones, δ’phase and partial S’phase dissolution. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。