非破壞性檢測對含銀Al-4.6Cu-0.3Mg鑄造鋁合金微結構與機械性質之關係

林冠翰(Guan-Han Lin)

指導教授 ： 李勝隆

國立中央大學/工學院/機械工程學系/碩士(2014年)

摘要

藉由非破壞性檢測技術(導電度量測與超音波檢測)探討微量銀對Al-4.6Cu-0.3Mg合金之微結構與機械性質影響的關連性;結果顯示經T6時效熱處理，合金之機械性質（硬度與拉伸強度）均隨銀含量增加而升高，而延性則反之；而在銀含量低於0.9wt%時，強化相(Ω+θ′)之析出量隨著銀含量增加而上升，同樣的，合金之相對導電度與相對聲波速度也顯現相同之趨勢，其增幅與微結構、機械性質之變化趨勢吻合;顯示非破壞性檢測技術（導電度與超音波量測），能作為含銀量對Al-4.6Cu-0.3Mg合金之微結構與機械性質影響的有效評估方法，且導電度量測較超音波測量更能靈敏的偵測強化相之析出。

關鍵字

非破壞性檢測 ； 鋁合金 ； 機械性質 ； 微結構 ； 導電度 ； 超音波

並列摘要

With non-destructive testing technology (electrical conductivity and ultrasonic testing), explore the correlation between silver with the microstructure and mechanical properties of Al-4.6Cu-0.3Mg alloy; The results showed that the alloys after T6 aging treatment, the mechanical properties (hardness and tensile strength) were increased with silver. The amount of precipitation phase (Ω + θ ') are increased with increasing silver content when silver is less than 0.9wt%, Similarly, the relative conductivity and relative ultrasonic speed show the consistent trend. Showing that non-destructive testing technology (conductivity and ultrasonic testing) can explore silver content of Al-4.6Cu-0.3Mg alloys with microstructure and mechanical properties. In addition, for the precipitation phase detection ,electrical conductivity measurement is more sensitive than ultrasound measurements.

並列關鍵字

non-destructive testing ； aluminum alloy ； mechanical properties ； microstructure ； conductivity ； ultrasound

參考文獻

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