(1、北京科技大學(xué)新金屬材料國家重點(diǎn)實(shí)驗(yàn)室，北京100083；
2、中國科學(xué)院金屬研究所，沈陽110015)
摘 要: 利用常規(guī)和高分辨電鏡(HREM)，研究了熱形變Ti-45Al-8Nb-2.5Mn-0.05B (摩爾分?jǐn)?shù))合金中偏離嚴(yán)格取向關(guān)系的α2/γ片層與非嚴(yán)格孿晶關(guān)系的γ/γT 片層以及這些非平衡片層界面的精細(xì)結(jié)構(gòu)，并提出了這些非平衡片層形成的可能位錯(cuò)反應(yīng)機(jī)制。
關(guān)鍵字: TiAl合金 α2/γ片層 γ/γT 片層 高分辨電鏡
（1.State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083 ;
2.Institute of Metals Research, Chinese Academy of Sciences, Shen yang 110015）
Abstract:Theα2/γ?lamellar deviating the strict orientation relationship and γ/γT lamellar without the strict twin relationship in a hot-deformed Ti-45Al-8Nb-2.5Mn-0.05B(mole percent) alloy were investigated by the conventional-electron microscopy and high-resolution electron microscopy (HREM), as well as the fine structures on these nonequilibrium interlamellar interfaces. The possible dislocation reactions of the nonequilibrium interface formation were also supposed.
Key words: TiAl-based alloy α2/γ lemellar γ/γT lamellar HREM
