利用扫描电镜(SEM)、透射电镜(TEM)、电子探针(EPMA)、能谱(EDS)和X射线衍射(XRD)技术研究了硅对定向凝固Ni3Al基合金IC6A微观组织的影响.结果表明在IC6A合金中添加0.10%～0.20%Si(质量分数,下同)会使合金的枝晶间区析出块状的Mo1.24Ni0.76相和Mo6(Ni0.75Si0.25)7相,当硅的添加量达到0.30%时,合金的枝晶间区除了析出这两种相外,还有针状的δ-NiMo相析出.这二相的析出不利于合金的高温持久性能,它们的硬度较大,只能通过孪晶的方式变形.硅有利于提高IC6A合金的高温抗氧化性能,而对合金的抗腐蚀性能和瞬时拉伸性能无明显影响.
参考文献
| [1] | 张洪涛;王天民;王聪 等.[J].稀有金属材料与工程,2001(30):583-587. |
| [2] | Xiao C B;Han Y F .Improvement of Oxidation Resistance and Mechanical Properties by the Addition of Yttrium and Silicon ina Ni3Al Base Alloy IC6[J].金属学报(英文版),1998(11):296. |
| [3] | 张洪涛;王天民;王聪;韩雅芳 .[J].稀有金属材料与工程,2001(30):158-163. |
| [4] | 肖程波;韩雅芳 .钇提高Ni3Al基合金IC6氧化皮/基体粘着力的机制[J].金属学报,1998,34(11):1158. |
| [5] | HANYF;Xiao C B .Effect of Yttrium on Microstructure and Properties of Ni3Al Base Alloy IC6[J].Intermetallics,2000,8:687. |
| [6] | Xiao C;Han Y .Effect of yttrium on diffusion layer of Ni-Al-Mo-B alloy IC6 during high temperature oxidation process[J].Scripta materialia,1999(11):1217-1221. |
| [7] | MINER R V .Effect of Silicon on the Oxidation, Hot-corrosion,and Mechanical Behavior of Two Cast Nickel-base Superalloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1977,8:1949. |
| [8] | Holt R T;Wallace W .Impurities and Trace Elements in Nickel-base Superalloys[J].International Metals Reviews,1976(21):1. |
| [9] | Mason S E;Rawlings R D .Structures and Hardness of Ni-Mo-Cr-Si Wear and Corrosion Resistant Alloys[J].Materials Science and Technology,1989,5(02):180. |
| [10] | Cieslak M J;Headley T J;Kollie T;RomingJrAD .A Melting and Solidification Study of Alloy 625[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1988,19:2319. |
| [11] | Durber G L R;Osgerby S;Quested P N .Effect of Small Amounts of Nitrogen and Silicon on Microstructure and Properties of Mar-M002 Nickel-base Superalloys[J].Metals and Technology,1984,11(04):129. |
| [12] | Hu Z Q;Sun W R;Guo S R .Effect of Phosphorus, Sulfur and Silicon on the Solidification, Segregation, Microstructure and Mechanical Properties in Fe-Ni Base Superalloys[J].金属学报(英文版),1996,9(06):443. |
| [13] | Xiao C B;Han Y F .Study on Recipitates in Ni-Al-Mo-B Alloy IC6 with Addition of Excess Amount of Yttrium[J].Scripta Materialia,1999,41(05):475. |
| [14] | Jin Y;Chaturvedi M C;Han Y F .Crystal Structure of δ-NiMo Phase in s Ternary Ni-Mo-Al Alloy[J].Materials Science and Engineering A,1997,225:78. |
| [15] | Xiao CB.;Han YF. .Effect of silicon on microstructure and stress rupture properties at 1100 degrees C of yttrium modified Ni-Al-Mo-B alloy IC6[J].Journal of Materials Science,2001(4):1027-1030. |
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