ZMnD-1J錳銅阻尼合金的時(shí)效組織

ZMnD-1J錳銅阻尼合金的時(shí)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(shí)效時(shí)的組織轉(zhuǎn)變過程, 進(jìn)而探索了其組織變化與合金阻尼性能的關(guān)系。結(jié)果表明：時(shí)效時(shí)的組織變化包括時(shí)效初期花呢結(jié)構(gòu)的形成、微細(xì)孿晶的形成和穩(wěn)定相α-Mn形成的3個(gè)階段； 時(shí)效前后最明顯的差別是時(shí)效后產(chǎn)生了微細(xì)孿晶, 隨孿晶數(shù)量的增加阻尼性能增加, 孿晶密度達(dá)最大值時(shí), 阻尼性能也最大； 隨時(shí)效時(shí)間的延長, α-Mn數(shù)量增加, 孿晶數(shù)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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