(沈陽建筑大學 交通與機械工程學院，沈陽 110168)
摘 要: 采用99.999%分析純的Al、Zn、Cu作原料，在外熱式坩堝爐中熔制了5Cu40Zn55Al、15Cu20Zn65Al和3Cu17Zn80Al共3種合金，將其經(jīng)過成分均勻化處理后，對包含亞穩(wěn)相的3種合金分別進行球磨和手工錘擊實驗，采用X射線衍射儀分析合金平衡相組合。結(jié)果表明：合金通過球磨能得到室溫平衡相，而通過手工捶擊則得不到室溫平衡相；能否通過應(yīng)力誘發(fā)相變快速獲得室溫合金平衡相組織與合金應(yīng)力作用產(chǎn)生的變形機制有關(guān)；球磨能使合金內(nèi)部發(fā)生大量變形，為合金向平衡相轉(zhuǎn)變提供驅(qū)動力和原子擴散通道；而手工錘擊主要是使合金發(fā)生以解理為主的脆性斷裂，這種變形不能為亞穩(wěn)相的轉(zhuǎn)變提供必要的驅(qū)動力和原子擴散通道，從而得不到合金室溫下的平衡相組成。
關(guān)鍵字: Al-Zn-Cu三元系合金；球磨；手工捶擊；應(yīng)力誘發(fā)相變；平衡相
（Traffic and Mechanical Engineering School, Shenyang Jian Zhu University, Shenyang 110168, China）
Abstract:5Cu40Zn55Al, 15Cu20Zn65Al and 3Cu17Zn80Al alloys were founded by using 99.999% Al, Zn and Cu as raw mater material in external-heat crucible. After uniform treatment, the alloys were then treated, respectively, by hand hammering and ball milling. The equilibrium phases of Al-Zn-Cu alloys were analyzed by XRD. The results show that the equilibrium phases of these three alloys can be obtained by ball milling at room temperature, but the result is contrary by hand hammering. So it is obtained that whether the equilibrium phase can be obtain or not by the stress at room temperature mainly depends on the feature of deformation mechanism of the alloys. During ball milling, the stress provides adequate deformation in the inner structure, which supplies enough driving force and diffuse alleyway of atom for the transformation of metastable phase. But the stress in the experiment during hand hammering only cause brittle rupture from cleavage to oriented, this can not offer enough driving force and diffuse alleyway of atom for the transformation of metastable phase, so the equilibrium phase of alloy can not be gotten at room temperature.
Key words: Al-Zn-Cu alloys; ball milling; hand hammering; stress induce phase transformation; equilibrium phase
