快速凝固Al-Zr-Ti合金的组织结构

苏勇

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快速凝固Al-Zr-Ti合金的组织结构
Structure of Rapidly Solidified Al-Zr-Ti Alloy
2002年第1期页码：3-5
纸质出版日期： 2002 ，
DOI：

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[1]苏勇.快速凝固Al-Zr-Ti合金的组织结构[J].特种铸造及有色合金,2002(01):3-5+3.

Su Yong. Structure of Rapidly Solidified Al-Zr-Ti Alloy[J]. Special Casting & Nonferrous Alloys, 2002,(1):3-5.
[1]苏勇.快速凝固Al-Zr-Ti合金的组织结构[J].特种铸造及有色合金,2002(01):3-5+3. DOI：

Su Yong. Structure of Rapidly Solidified Al-Zr-Ti Alloy[J]. Special Casting & Nonferrous Alloys, 2002,(1):3-5. DOI：

摘要

利用透射电子显微镜研究了快速凝固Al 4Zr 2Ti合金的组织结构。结果表明 :快凝合金的显微硬度与其显微组织密切相关

快凝合金激冷态组织显示出单一相———过饱和Al基固溶体

此时显微硬度为 2 2 0HV。快凝合金经 42 0℃退火4h

具有立方结构的亚稳相L12 Al3 （Zr

Ti）析出

此时显微硬度达到峰值 2 60HV。而经 42 0℃退火 2 0h

则L12 相转变为DO2 3相

同时

显微硬度下降到 15 0HV。

Abstract

The structure of rapidly solidified Al-4Zr-2Ti （atom percentage） with spinning technique was investigated by means of TEM. The results showed that the micro-hardness values were closely correlated with the microstructure of the rapidly solidffied alloy. Melt-spun inicrostructuze of rapidly solidified alloy was founded to be single-phase-supersaturated Al base solid solution and the micro-hardness values were 220 HV. The metastable phase L1\-2-A1\-3（Zr

Ti） with cubic Li\-2 stnrcture was precipitated from the rapidly solidified alloy during annealing for 4 hours at 420℃ and the micro-hardness reached peak values of 260 HV while the Li\-2 phase in rapidly solidified alloy was transformed into DO 23 phase during annealing for 20 hours at 420℃ and the micro-hardness values decreased up to 150 HV.