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預(yù)變形對(duì)TB3合金時(shí)效析出行為及其力學(xué)性能的影響
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國(guó)家“973”基礎(chǔ)研究項(xiàng)目（2007CB613804）


Influence of Predeformation on Aging Precipitation Behavior and Mechanical Properties of TB3
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    摘要:

    研究固溶處理后的預(yù)變形對(duì)Ti-10Mo-8V-1Fe-3.5Al（TB3）隨后時(shí)效過(guò)程中α相析出行為以及時(shí)效處理后力學(xué)性能的影響。對(duì)于經(jīng)過(guò)預(yù)變形的試樣時(shí)效后在金相顯微鏡下觀察到網(wǎng)狀的析出組織。透射電子顯微鏡觀察表明：預(yù)變形時(shí)效試樣中，α片優(yōu)先在滑移帶、晶界等高密度位錯(cuò)區(qū)形核長(zhǎng)大，并伴有α片的變體選擇效應(yīng)。金相與X射線衍射結(jié)果表明，預(yù)變形對(duì)α相變有促進(jìn)作用。拉伸試驗(yàn)結(jié)果顯示：與自由時(shí)效相比，通過(guò)冷變形可以縮短時(shí)效時(shí)間，提高材料拉伸強(qiáng)度，但同時(shí)降低了材料的延性。

    Abstract:

    The influence of prior cold deformation after solution treatment on the α phase precipitation behavior during the subsequent aging treatment and final mechanical properties of TB3(Ti-10Mo-8V-1Fe-3.5Al) alloys was investigated. In the predeformed samples, network patterns were observed after aging treatment by metallographic microscope. Transmission electron microscopic (TEM) observation shows that in the predeformed-aged samples, the plate-shaped α precipitates prefer to nucleate and grow in high density dislocation sites, such as grain boundaries and slip bands. In addition, variant selection effects were observed in these samples. Results of X-ray diffraction and metallographic microscope indicate that α phase precipitation process could be accelerated in predeformed samples. Tensile test results reveal that by cold deformation the aging time could be shortened and the tensile strength could be enhanced, while the ductility could be reduced, in comparison with the freely aged sample.

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宋振亞,孫巧艷,肖 林,孫 軍,葛 鵬.預(yù)變形對(duì)TB3合金時(shí)效析出行為及其力學(xué)性能的影響[J].稀有金屬材料與工程,2010,39(5):791~795.[Song Zhenya, Sun Qiaoyan, Xiao Lin, Sun Jun, Ge Peng. Influence of Predeformation on Aging Precipitation Behavior and Mechanical Properties of TB3[J]. Rare Metal Materials and Engineering,2010,39(5):791~795.]
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  • 收稿日期:2009-05-10
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