利用电场凝固技术在Ti-50at％Al合金固相线以上糊状区和液相区内,对其进行稳恒电场处理,通过对比有无电场和对比不同电流密度对合金凝固组织的作用效果,研究电场对合金凝固组织中y相和γ/α2片层组织形态、尺寸的影响规律.结果表明:稳恒电场在靠近电极附近对合金的作用效果最明显;且随着电流密度的增大,Ti-50at％ Al合金的晶粒尺寸逐渐减小.
参考文献
| [1] | M.T. Jovanovic;B. Dimcic;I. Bobic .Microstructure and mechanical properties of precision cast TiAl turbocharger wheel[J].Journal of Materials Processing Technology,2005(1):14-21. |
| [2] | BASRNAK J;SPRECHER A;CONRAD H .Colony (Grain)size reduction of eutectic Pb-Sn castings by electropulsing[J].Scripta Materialia,1995,32(06):879-884. |
| [3] | Liao XL;Zhai QJ;Song CJ;Chen WJ;Gong YY .Effects of electric current pulse on stability of solid/liquid interface of Al-4.5 wt.% Cu alloy during directional solidification[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1-2):56-60. |
| [4] | 徐前刚,武保林,万刚,赵玉华,王洪顺.直流电场对Al-4.5%Cu合金定向凝固组织的影响[J].航空材料学报,2006(01):16-19. |
| [5] | 王劲,尹建军,丁雨田,陈体军,丁宗富,许广济.直流电场对ZA27合金凝固组织的影响[J].铸造,2003(02):84-88. |
| [6] | MISRA A .Technique applied to solidification of cast iron[J].Metallurgical and Materials Transactions (A),1986,17(02):358-360. |
| [7] | 范金辉,李仁兴,侯旭,陈宇,翟启杰.不同参数脉冲电流对不锈钢Cr18Ni9Ti凝固组织的影响[J].铸造技术,2003(06):534-536. |
| [8] | 李应举,杨院生,冯小辉,张宇男,胡壮麒.直流电流对一种镍基单晶高温合金γ'相析出的影响[J].金属学报,2006(09):942-946. |
| [9] | AHMED S;McKANNAN E .Control of morphologyin nickel base superalloys through alloy design and densification processing under electric field[J].Materials Science and Technology,1994,10(11):941-946. |
| [10] | YAMAMOTO T;CHAN S K;LU J G et al.Enhanced high-field transport critical current-density of superconducting bulk Y-Ba-Cu-O prepared by rapid solidification and directional annealing[J].Physical Review B,1992,46(13):8509-8514. |
| [11] | LIAO X L;ZHAIQ J;LUO J et al.Refining mechanism of the electric current pulse on the solidification strncture of pure aluminum[J].Acta Materialia,2007,55(09):3103-3109. |
| [12] | Zhang Yong,Ding Hongsheng,Jiang Sanyong,Chen Ruirun,Guo Jingjie.Numerical simulation of electromagnetic and flow fields of TiAI melt under electric field[J].中国铸造,2010(03):241-247. |
| [13] | 孔凡涛,陈子勇,田竞,陈玉勇.提高TiAl基合金室温塑性的方法[J].稀有金属材料与工程,2003(02):81-86. |
| [14] | KAWABATA T;TAMURA T;IZUMI O .Effect of Ti/Al ratio and Cr,Nb,and Hf additions on material factors and mechanical properties in TiAl[J].Metallurgical and Materials Transactions (A),1993,24(01):141-150. |
| [15] | 张伟强.金属电磁凝固原理与技术[M].北京:冶金工业出版社,2004:162-164,167. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%