Effect of phosphorus on solidification process and segregation of directionally solidified IN738 superalloy

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · Metallurgical Transactions, B

DOI:https://doi.org/10.1007/BF02651730· OSTI ID:94387

Zhu, H Q; Hu, Z Q; Zhu, Y X; Guo, S R; Guan, H R; Shi, C X ^[1]; Morinaga, M ^[2]; Murata, Y ^[3]

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1. Academia Sinica, Shenyang (China). Inst. of Metal Research
2. Nagoya Univ. (Japan). Dept. of Materials Science and Technology
3. Toyohashi Univ. of Technology (Japan). Dept. of Production Systems Engineering

The effect of phosphorus on the solidification and the solute segregation of a directionally solidified IN738 Ni-based superalloy was investigated experimentally employing a method of partially directional solidification and subsequent quick quenching. It was found that the phosphorus addition widened the solidus-liquidus temperature interval of the alloy. Both the P content and the solidification rate affected the morphology of the solid-liquid interface and the precipitation of phosphides in the alloy. Phosphorus segregated largely in the intercellular/interdendritic regions and promoted the segregation of other alloying elements in the solidified structure.

• Sponsoring Organization: USDOE
• OSTI ID: 94387
• Journal Information: Metallurgical Transactions, B, Journal Name: Metallurgical Transactions, B Journal Issue: 4 Vol. 26; ISSN MTTBCR; ISSN 0360-2141
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DIFFUSION
HEAT RESISTING ALLOYS
INCONEL 738
METALLURGICAL EFFECTS
PHOSPHORUS
SEGREGATION
SOLIDIFICATION