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小口徑TA18航空鈦合金管材織構測定與分析
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國家自然科學基金委員會與中國民用航空局聯(lián)合資助項目(61179068)


Testing and Analysis of the Texture for the Small-Caliber Seamless Ti-3Al-2.5V Alloy Tube
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    摘要:

    利用X射線衍射極圖測量技術,對國內(nèi)試制的Φ6 mm的TA18 (Ti-3Al-2.5V) 合金冷軋管材的織構類型進行研究。并測量了國外同直徑的商用航空管材的織構類型和強度,與國產(chǎn)的管材進行了對比分析。采用管材減薄展平法解決了形狀對X射線衍射強度影響無法修正的困難,實現(xiàn)了對管材織構的精確測定。結(jié)果表明:國產(chǎn)管材的織構類型與進口管材基本相似,主織構的(0002)面與管材徑向夾角均為24°,晶向[100]與管軸向平行。但是織構的強度差別很大,進口管材的織構強度是國產(chǎn)管材的2倍以上。提高織構強度及減小離散程度是改善國產(chǎn)管材性能的一個重要方向。

    Abstract:

    The textures of homemade cold rolled Ti-3Al-2.5V alloy tubes with the diameter of 6 mm were investigated. The textures were measured by means of pole figure technique of X-ray diffraction. Meanwhile, the components and intensity of textures of the imported commercially aviational tubes with the same diameter were measured and compared to those of the homemade tubes. The difficulty of the inable revision of the shape effect on X-ray diffraction intensity was solved by the method of thinning and flattening, resulting in realizing of the accurate measurement of the tube texture. The experimental results show that the textures type of domestic and imported tubes are the similar. Main type of texture is that the included angle between the crystal orientation [0002] and radial direction of tube is 24°, meanwhile the crystal orientation [100] is parallel to the axial direction of tubes. However, the texture intensity difference between domestic and imported tubes is remarkable. The quantitative value of the latter is twice as much as that of the former. Thus inceasing of the texture intensity and reducing of dispersion degree are an important factor of improving the properties of domestic tubes.

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李興榮,張 暉,張旺峰,李 艷,王玉會.小口徑TA18航空鈦合金管材織構測定與分析[J].稀有金屬材料與工程,2012,41(7):1243~1246.[Li Xingrong, Zhang Hui, Zhang Wangfeng, Li Yan, Wang Yuhui. Testing and Analysis of the Texture for the Small-Caliber Seamless Ti-3Al-2.5V Alloy Tube[J]. Rare Metal Materials and Engineering,2012,41(7):1243~1246.]
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  • 收稿日期:2011-08-21
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