ZMnD-1J錳銅阻尼合金的時效組織

ZMnD-1J錳銅阻尼合金的時效組織Aging microstructure of ZMnD-1J Mn-Cu damping alloy

借助于透射電子顯微分析和衍射花樣分析, 研究了ZMnD-1J四元錳銅阻尼合金時效時的組織轉變過程, 進而探索了其組織變化與合金阻尼性能的關系。結果表明：時效時的組織變化包括時效初期花呢結構的形成、微細孿晶的形成和穩定相α-Mn形成的3個階段； 時效前后最明顯的差別是時效后產生了微細孿晶, 隨孿晶數量的增加阻尼性能增加, 孿晶密度達最大值時, 阻尼性能也最大； 隨時效時間的延長, α-Mn數量增加, 孿晶數量減少, 阻尼性能也降低。

The changing process of the microstructure of ZMnD-1J Mn-Cu damping alloy during aging was studied by the analyzing of transmission electron microstructure and diffraction patterns. And then, the relationships between the transformation of the alloy microstructure and its damping property were investigated. The results show that, during aging the transformation of the alloy microstructure consists of three stages, including the form of mottled substructure during primary aging, the forms of microtwinning and stable phase α-Mn. Compared the former microstructure in aging with the latter microstructure in aging, the most obvious different is that the latter produces microtwinning. Damping property increases in direct ratio with the quantity of twin. When the density of twin reaches maximum, damping property is also maximum. Prolonging with period of damping, the quantity of α-Mn increases, the quantity of twin decreases, the damping property decreases.

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