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TC4鈦合金顯微組織對(duì)超聲波探傷雜波水平的影響
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Effect of Microstructures on Noise Level in Ultrasonic Testing of TC4 Titanium Alloy
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    研究了TC4鈦合金顯微組織對(duì)超聲波探傷雜波水平的影響。利用光學(xué)顯微鏡對(duì)具有不同超聲波探傷雜波水平區(qū)域的顯微組織進(jìn)行了對(duì)比，研究建立了一種對(duì)顯微組織不均勻性的表征方法，結(jié)合該方法分析了組織與探傷雜波水平的關(guān)系。利用電子背散射衍射技術(shù)（EBSD）對(duì)顯微組織不均勻區(qū)域進(jìn)行了晶體取向分析。結(jié)果顯示，探傷雜波水平較高區(qū)域呈現(xiàn)出明顯的顯微組織不均勻性，結(jié)合超聲探傷原理分析得出不均勻區(qū)域顯微組織晶體取向變化是產(chǎn)生雜波的根本原因。此外還對(duì)比研究了原始β晶粒尺寸對(duì)超聲探傷雜波水平的影響，結(jié)果表明顯微組織界面越多，超聲探傷雜波水平越高

    Abstract:

    The effect of microstructures on noise level in ultrasonic testing of TC4 titanium alloy was investigated. A comparative study of microstructures for different noise levels was performed using optical microscopy. A new characterization of microstructure inhomogeneity was developed and used to explain the reason for different noise levels. The EBSD technique was used to provide orientation information about these inhomogeneous microstructures. Results show that the region with high noise level presents obvious microstructure inhomogeneity. With the principle of ultrasonic testing, it is concluded that the variation of crystallography orientation would essentially give rise to the noise in ultrasonic testing. Finally ultrasonic response of TC4 alloy with different β grain sizes was investigated, and it is shown that the specimen with more microstructure interfaces exhibits a higher noise level

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李 華,馬英杰,邱建科,王 新,馬小懷,王娟華,劉羽寅,雷家峰. TC4鈦合金顯微組織對(duì)超聲波探傷雜波水平的影響[J].稀有金屬材料與工程,2013,42(9):1859~1863.[Li Hua, Ma Yingjie, Qiu Jianke, Wang Xin, Ma Xiaohuai, Wang Juanhua, Liu Yuyin, Lei Jiafeng. Effect of Microstructures on Noise Level in Ultrasonic Testing of TC4 Titanium Alloy[J]. Rare Metal Materials and Engineering,2013,42(9):1859~1863.]
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  • 收稿日期:2012-09-21
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