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| 題 名 | Mechanisms Controlling the Strength of Aluminum Solid Solutions=控制鋁固溶體強度之機制 |
|---|---|
| 作 者 | 吳新明; | 書刊名 | 大同學報 |
| 卷 期 | 24 1994.11[民83.11] |
| 頁 次 | 頁35-43 |
| 分類號 | 440.39 |
| 關鍵詞 | 鋁固溶體; 強度; |
| 語 文 | 英文(English) |
| 中文摘要 | 稀薄鋁-銅、鋁-鎂合金單晶以Bridgman法成長。這些合金單晶在[358]方向之流應力在液態氮溫度下測量,以求其臨界分解剪應力。所測之值與現有之強度-濃度理論加以解釋。實驗結果顯示,在實驗之誤差範圍內,鋁固溶合金之臨界分解剪應力與濃度之關係可以c 1/2或c2/3之關係描述。在鋁固溶合金中,鋁被銅與鎂溶質原子之強化為起於溶質原子與刃差排之交互作用。溶質原子與鋁原子之大小、及彈性模數差異為造成此固溶合金強化之原因。 |
| 英文摘要 | Single crystals of dilute Al-Cu and Al-Mg alloys were grown by the Bridgman method. The flow stresses of the alloys were measured in the [358] orientation at liquid nitrogen temperature to obtain the critical resolved shear stresses (CRSS). The measured values were utilized to correlate with the existing concentration-strength relationships. It is found that within the experimental error, the concentration dependence of the CRSS in aluminum solid solutions can be described fairly by either a c or a c relationship. The strengthening of aluminum by Cu and Mg solutes is due to the interactions of solute atoms with edge dislocations. Differences in atomic size and modulus between solutes and Al matrix are believed to be responsible for the strengthening. |
本系統中英文摘要資訊取自各篇刊載內容。