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鈦合金α＋β/β轉(zhuǎn)變溫度測(cè)定的金相法與差熱分析法對(duì)比研究
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A Comparative Study of Differential Thermal Analysis Method and Metallographic Observation Method for the α+β/β Transformation Temperature of Titanium Alloys
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    摘要:

    以α型鈦合金TA7、α＋β型兩相鈦合金TC4及近β型鈦合金Ti-1023為例，對(duì)比研究了金相法和差熱分析法測(cè)定鈦合金α＋β/β相轉(zhuǎn)變溫度的一致性問題。結(jié)果表明：α型鈦合金TA7發(fā)生相變時(shí)，DSC曲線上產(chǎn)生1個(gè)明顯的吸熱峰，其涉及的溫度范圍約60 ℃，當(dāng)定義DSC曲線的一階導(dǎo)數(shù)的峰值為相變溫度時(shí)，所測(cè)得的相變溫度與金相法的很接近；α＋β型兩相鈦合金TC4和近β型鈦合金Ti-1023發(fā)生相變時(shí)，DSC曲線僅表現(xiàn)為基線偏移，涉及的溫度范圍10~15 ℃，由DSC曲線一階導(dǎo)數(shù)峰值定義的相變溫度與金相法符合得很好

    Abstract:

    Differential scanning calorimetry (DSC) method and metallographic observation method have been adapted for the measurement of α＋β/β transformation temperatures of α titanium alloy TA7, α＋β titanium alloy TC4 and near β titanium alloy Ti-1023, and the coincidence has been discussed in the present paper. For the TA7 alloy, an obvious endothermic peak which covers a temperature range of about 60 ℃ occurred during α＋β/β transformation. The transformation temperature defined by the peak of first order derivative of the DSC curve was much near the temperature determined by the metallographic observation method. For the alloys TC4 and Ti-1023, on the other hand, only little baseline shifts which cover a temperature range of about 10~15 ℃ was observed during transformation. A better coincidence with the metallographic observation method was achieved for the alloys TC4 and Ti-1023 owing to the much narrow transformation temperature range.

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陳紹楷,田弋緯,常 璐,苗 壯,夏金華.鈦合金α＋β/β轉(zhuǎn)變溫度測(cè)定的金相法與差熱分析法對(duì)比研究[J].稀有金屬材料與工程,2009,38(11):1916~1919.[Chen Shaokai, Tian Yiwei, Chang Lu, Miao Zhuang, Xia Jinhua. A Comparative Study of Differential Thermal Analysis Method and Metallographic Observation Method for the α+β/β Transformation Temperature of Titanium Alloys[J]. Rare Metal Materials and Engineering,2009,38(11):1916~1919.]
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  • 收稿日期:2008-11-25
  • 最后修改日期:2009-09-15
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