發(fā)布時(shí)間：2018-02-26 06:27

  本文關(guān)鍵詞： O相TiAl合金 組織演化 時(shí)效處理 球化　出處：《Transactions of Nonferrous Metals Society of China》2015年08期 　論文類型：期刊論文

【摘要】：研究正交結(jié)構(gòu)Ti-22Al-26Nb-1Zr合金片層組織在長期時(shí)效過程中B2相的分解、O相板條的球化等顯微組織演變規(guī)律。結(jié)果表明:合金加熱到B2單相區(qū)爐冷后可以獲得板條組織,在(O+B2)相區(qū)700℃時(shí)效100 h以內(nèi)顯微組織無明顯變化。但在長時(shí)時(shí)效過程中板條組織發(fā)生明顯粗化。在700℃長期時(shí)效800 h時(shí),B2相極不穩(wěn)定,會(huì)在時(shí)效初期短時(shí)間內(nèi)迅速發(fā)生分解。隨著時(shí)效時(shí)間的延長,塊狀和少量板條狀O相在晶界和O/BCC相界處析出并以球狀形式長大。此外,在時(shí)效時(shí)間超過100 h后,會(huì)有明顯的樹枝狀O相板條組織形成。
[Abstract]:The evolution law of spheroidization and other microstructures of decomposition of B2 phase and O phase during long aging of Ti-22Al-26Nb-1Zr alloy lamellar structure with orthogonal structure was studied. The results show that the strip structure can be obtained when the alloy is heated to B2 single phase furnace. There was no obvious change in microstructure within 100 h of aging at 700 鈩，

本文編號(hào)：1536898