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時效工藝對Ti-10V-2Fe-3Al合金顯微組織和力學(xué)性能的影響
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航空重點基金(2007ZF21011)；國家重點基礎(chǔ)研究發(fā)展計劃資助項目 (2007CB613802)


Influence of Aging Processing on Microstructure and Mechanical Properties of Ti-10V-2Fe-3Al Alloy
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    研究單重時效、低溫-高溫雙重時效、時效加熱速度等工藝對Ti-10V-2Fe-3Al合金顯微組織和力學(xué)性能的影響。結(jié)果表明：經(jīng)過高溫變形后的合金，在雙重時效處理過程中，先析出的ω相為α相的沉淀析出提供均勻的形核點，使合金獲得比單重時效處理更加均勻細小的α+β顯微組織，獲得更好的強韌化匹配；合金在以較低的升溫速度(0.1 ℃/s)加熱過程中，細小彌散分布的等溫ω相有充足的時間析出，從而為后續(xù)α相的析出提供有利的形核位置，產(chǎn)生細小盤狀α相，獲得與雙重時效相同的強韌化匹配效果

    Abstract:

    Effects of one-step aging, two-step aging of low-temperature and high-temperature and heating rate of aging on the microstructure and mechanical properties of Ti-10V-2Fe-3Al titanium alloy after high temperature deformation were studied. The results show that comparing with one-step aging, in the two-step aging the early precipitated ω particles provided uniform nucleation sites for α phase during the low-temperature aging. As a result, the two-step aging sequences led to much finer and more uniform α+β microstructure to obtain good match of strength and ductility. For a slow heating rate of 0.1 oC/s to the peak aging temperature, a very finely dispersed isothermal ω-phase had enough time to precipitate, and thus provided nucleation sites of high density for the α-phase, resulting in the very fine α plates; therefore, the same match effect of strength and ductility was obtained

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商國強,寇宏超,費 躍,常 輝,朱知壽,王新南,張豐收,李金山.時效工藝對Ti-10V-2Fe-3Al合金顯微組織和力學(xué)性能的影響[J].稀有金屬材料與工程,2010,39(6):1061~1065.[Shang Guoqiang, Kou Hongchao, Fei Yue, Chang Hui, Zhu Zhishou, Wang Xinnan, Zhang Fengshou, Li Jinshan. Influence of Aging Processing on Microstructure and Mechanical Properties of Ti-10V-2Fe-3Al Alloy[J]. Rare Metal Materials and Engineering,2010,39(6):1061~1065.]
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  • 收稿日期:2009-06-01
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