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| INFLUENCE OF CRYSTAL ORIENTATION ON THE PRIMARY DENDRITE ARM SPACING OF A SINGLE CRYSTAL SUPERALLOY |
| HE Guo;LI Jianguo;MAO Hiemin;FU Hengzhi(Northwestern Polytechnical University;Hi'an 710072)(Manuscript received 1994-09-13.in revised form 1995-03-13) |
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Cite this article:
HE Guo;LI Jianguo;MAO Hiemin;FU Hengzhi(Northwestern Polytechnical University;Hi'an 710072)(Manuscript received 1994-09-13.in revised form 1995-03-13). INFLUENCE OF CRYSTAL ORIENTATION ON THE PRIMARY DENDRITE ARM SPACING OF A SINGLE CRYSTAL SUPERALLOY. Acta Metall Sin, 1995, 31(7): 309-314.
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Abstract A model for relating the primary dendrite arm spacing to the crystalorientation has been developed.An experiment for investigating the primary dendrite arm spacing in single crystal superalloy DD8 has also been carried out.The results indicate that the primary dendrite arm spacing decreases when the preferred orientation of the dendrite deviates from the solidified direction.The influence of the crystal orientation on the primary dendrite arm spacing is much slight with higher thermal gradient and higher solidification rate.The experimental results are consistent with the prediction of the model.Correspondenl:HE Guo,(Naltonal Key Laboratory,of Advanced Melallic Materials,Unirersity of Science and Technology.Beijing,Beijing.100083)
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Received: 18 July 1995
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| 1BurdenMH,HuntJD．JCrystGrowth．1974;22;99．1092TrivediR,JCrystGrowth,1980:49:2193KurzW,FisherDJ．ActaMetall,1981;29:114KurzW,FisherDJ．FundamentalsofSolidification．Aedermannsdorf:TransTechPublicationsLtd．1984:805TrivediR,MasonJTMasonJ．MetallTransA,1991:22A:2356TrivediR．SeetharamanV．EshelmanMA．MetallTransA,1991;22A:5857HuangSC,GlicksmanMEActaMetall,1981;29:7178何国．西北工业大学博士学们论文,1994 |
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