定向凝固NiAl-Cr(Mo)-Hf(Ho)共晶合金的组织与性能
收稿日期: 2009-10-10
修回日期: 2010-03-19
网络出版日期: 2010-06-11
MICROSTRUCTURES AND MECHANICAL PROPERTIES OF DIRECTIONALLY SOLIDIFIED NiAl–Cr(Mo)–Hf(Ho) EUTECTIC ALLOY
Received date: 2009-10-10
Revised date: 2010-03-19
Online published: 2010-06-11
肖旋 , 郭建亭 , 谢亿 . 定向凝固NiAl-Cr(Mo)-Hf(Ho)共晶合金的组织与性能[J]. 金属学报, 2010 , 46(6) : 701 -707 . DOI: 10.3724/SP.J.1037.2009.00668
The alloy with nominal composition of Ni-30.4Al-34Cr-4.3Mo-0.1Hf-0.05Ho (atomic fraction, %) has been directionally solidified at two withdrawal rates by liquid metal (Sn) cooling (LMC) process. Compared to the as-cast alloy, directional solidification process eliminates primary Cr(Mo) phase. With increasing withdrawal rate from 8 to 15 mm/min, the diameter of NiAl/Cr(Mo) eutectic cell decreases from 115 to 85 μm. In addition, the intercellular spaces and disordered regions become less. In virtue of the disappearance of primary Cr(Mo) phase, the mechanical properties of directionally solidified alloys are better than those of as--cast alloy and are further improved with increasing withdrawal rate.
[1] Noebe R D, Bowman R R, Nathal N V. Int Mater Rev, 1993; 38: 193
[2] Miracle D B. Acta Metall Mater, 1993; 41: 649
[3] Johnson D R, Oliver B F, Noebe R D, Whittenberger J D. Intermetallics, 1995; 3: 493
[4] Yang J M, Jeng S M, Bain K, Amato R A. Acta Metall Mater, 1997; 45: 295
[5] Johnson D R, Chen X F, Oliver B F, Noebe R D, Whittenberger J D. Intermetallics, 1995; 3: 99
[6] Walter J L, Cline H E. Metall Trans, 1970; 1: 1221
[7] Cline H E, Walter J L. Metall Trans, 1970; 1: 2907
[8] Cline H E, Walter J L, Lifshine E, Russell R R. Metall Trans, 1971; 2: 189
[9] Chen X F, Johnson D R, Noebe R D, Oliver B F. J Mater Res, 1995; 10: 1159
[10] Raj S V, Locci I E. Intermetallics, 2001; 9: 217
[11] Whittenberger J D, Raj S V, Locci I E, Salem J A. Intermetallics, 1999; 7: 1159
[12] Raj S V, Locci I E, Salem J A, Pawlik R J. Metall Mater Trans, 2002; 33A: 597
[13] Jachson K H, Hunt J D. Trans Metall Soc AIME, 1966; 236: 1129
[14] Whittenberger J D, Locci I E, Darolia R, Bowman R R. Mater Sci Eng, 1999; A268: 165
[15] Takeyama M, Liu C T. J Mater Res, 1990; 5: 1189
[16] Guo J T, Cui C Y, Qi Y H, Ye H Q. J Alloys Compd, 2002; 343: 142
[17] Guo J T, Huai K W, Gao Q, Ren W L, Li G S. Intermetallics , 2007; 15: 727
[18] Ren W L, Guo J T, Li G S, Zhou J. Mater Lett, 2003; 57: 1374
/
| 〈 |
|
〉 |
