Acta Metallurgica Sinica (English Letters) ›› 1994, Vol. 7 ›› Issue (3): 215-219.

• Research paper • Previous Articles     Next Articles

DISTRIBUTION OF Nd-RICH PHASE PARTICLES IN AS-CAST Ti-5Al-4Sn-2Zr-lMo-0.25Si-1Nd ALLOY

LI Geping, LI Dong, LIU Yuyin, HU ZhuangqiInstitute of Metal Research, Chinese Academy of Sciences, Shenyang,China   

  • Received:1994-06-25 Revised:1994-06-25 Online:1994-06-25 Published:2009-10-10

Abstract: For the as-cast Ti-55 alloy, the morphology of the alloy riser consists of coarse dendrite zone and equiaxial grain zone. The second phase particles are 2.0-25 um in diameter. Some particles appear at grain boundaries, the others precipitate within grains. The shapes of the particles are mainly ellipsoids, and a few kinds of short needle-like and block v morphologies. The Nd-rich phase particles are enriched in the liquid before the inter face and are engulfed along the solidification plane-front. Finally, bands of Nd-rich phase par-ticles form parallel to the advancing solidification plane-front.

Key words: Ti-55 alloy, Nd-rich phase, Nd