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| INVESTIGATION OF MICROSTRUCTURE OF CAST Ti ALLOY CONTAINING RARE EARTH |
| by LI Yaguo; ZHANG Shaoqing; LI Chunzhi: ZHANG Tixin (Institute of Aeronautical Materials; Belling) (Manuscript received 2 November; 1982; revised manuscript 17 May; 1983) |
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Cite this article:
by LI Yaguo; ZHANG Shaoqing; LI Chunzhi: ZHANG Tixin (Institute of Aeronautical Materials; Belling) (Manuscript received 2 November; 1982; revised manuscript 17 May; 1983). INVESTIGATION OF MICROSTRUCTURE OF CAST Ti ALLOY CONTAINING RARE EARTH. Acta Metall Sin, 1984, 20(2): 131-216.
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Abstract An investigation was conducted to examine the effect of Ce addition from 0.02 to 0.24 wt-％ on the microstructure and mechanical properties of Ti-5Al-5Mo-2Sn-0.25Si cast alloy. The correlation between Ce and other alloying elements, the form and behaviour as well as the strengthening mechanism of Ce have also been studied. It is shown that the Ce addition at trace level has almost no influence on the room temperature tensile properties of the ahoy, but improves obviously its stress-rupture properties at elevated temperatures. A superior combination of its mechanical properties lies on 0.02—0.03％ Ce added. The reason why it has strengthened may be the result of the dispersion-strengthening of cerium oxide particles, the stabilization of dislocation substructures and the purification of grain boundaries.
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Received: 18 February 1984
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