標題: 銅-25錳-25鋁和銅-25錳-35鋁合金淬火顯微結構
The As-quenched Microstructures of Cu-25Mn-25Al and Cu-25Mn-35Al Alloys
作者: 譚澤安
John Tan
劉增豐
Tzeng-Feng Liu
材料科學與工程學系
關鍵字: 
公開日期: 1992
摘要: 我們利用穿透式電子顯微鏡(TEM)以及X光能量分佈儀(EDS)來觀察銅-25
錳 -25鋁(合金 A)和銅-25錳-35鋁(合金 B)的淬火顯微結構結果發現如下
:當合金 A 經850℃作固溶處理1小時後,淬火於冰食鹽水中,發現有細
小的析出物在基地內形成,分析包含析出物及其周圍基地的選擇區域繞射
圖形。結果發現Cu-25Mn-25Al(Cu2MnAl,合金 A)的淬火顯微結構為(L21
+ω)相的混合,此結果與其它學者所觀察到的單一L21相不同。當合金
B 經850℃作固溶處理1小時後,淬火於冰食鹽水中,Cu-25Mn- 35Al(合
金 B)的淬火顯微結構為(L21+B2+ω)相的混合,此結果與其它研究學者
在Cu3-xMnxAl合金系統中所觀察到的顯微結果截然不同。
The as-quenched microstructures of Cu-25Mn-25Al ( Alloy A ) and
Cu-25Mn-35Al ( Alloy B ) alloys have been investigated by using
transmission electron microscopy ( TEM ) and energy-dispersive
X-ray spectrometer. ( EDS) The experimental results are
summarized as follow: When the alloy A was solution heat-
treated at 850℃ for 1 hour and then quenched into iced brine
rapidly. There are some fine precipitates presented within the
matrix in the as-quenched specimen. From the analyses of the
selected-area diffraction patterns ( SADPs ) taken from an area
which covers fine precipitates and their surrounding matrix, it
is concluded that the as-quenched microstructure of the Cu-25
Mn-25Al ( Cu2MnAl, Alloy A ) alloy is a mixture of ( L21 + w )
phases, rather than a single L21 phase reported by other
workers in the as-quenched Cu2MnAl alloy. When the alloy B was
solution heat-treated at 850℃ for 1 hour and then rapidly
quenched into iced brine. The microstructure of the Cu-25Mn-35
Al (Alloy B ) alloy is a mixture of ( L21 + B2 + w ) phases,
which is quite different from that reported by other workers in
the Cu3-xMnxAl alloy system.
URI: http://140.113.39.130/cdrfb3/record/nctu/#NT810159016
http://hdl.handle.net/11536/56686
顯示於類別:畢業論文