Effects of heat treatment on microstructure of directionally solidified Ti-45Al-8Nb-(W, B, Y) alloy
作者： Xian-fei DING , Jun-pin LIN , Lai-qi ZHANG , Guo-liang CHEN
DOI: 10.1016/S1003-6326(11)60673-0
关键词:
摘要: The effects of heat treatments on typical microstructures directionally solidified (DS) Ti-45Al-8Nb-(W, B, Y) (molar fraction, %) alloys prepared by the Bridgeman method were studied. Two DS including full lamellae with cellular growth morphology and massive structure dendritic examined. results show that treatment 1250℃ for 24 h+900℃ 30 min+air cooling can efficiently eliminate B2 phase in change rapid alloy into lamellar microstructure. Columnar colonies widths 150-200 μm 50-100 respectively observed intercellular arm regions. 1400℃ 12 could simultaneously remove phase, solidification segregations from alloys, however, it caused severe grains.
cnki.com.cn
elsevier.com参考文章(13)
Abhishek Gupta, Jörg M.K. Wiezorek, Microstructural evolution of PST-TiAl during low-rate compressive micro-straining at 1023 K in hard and soft orientations Intermetallics. ,vol. 11, pp. 589- 600 ,(2003) , 10.1016/S0966-9795(03)00048-7
Tetsuya Asai, Seiki Hirata, Masao Takeyama, Takashi Matsuo, Microstructure in Ti–48at.%Al PST crystal subjected to creep deformation Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 329, pp. 828- 834 ,(2002) , 10.1016/S0921-5093(01)01635-5
G.L. Chen, X.J. Xu, Z.K. Teng, Y.L. Wang, J.P. Lin, Microsegregation in high Nb containing TiAl alloy ingots beyond laboratory scale Intermetallics. ,vol. 15, pp. 625- 631 ,(2007) , 10.1016/J.INTERMET.2006.10.003
D.R. Johnson, K. Chihara, H. Inui, M. Yamaguchi, Microstructural control of TiAl-Mo-B alloys by directional solidification Acta Materialia. ,vol. 46, pp. 6529- 6540 ,(1998) , 10.1016/S1359-6454(98)00310-3
X.J. Xu, J.P. Lin, Y.L. Wang, J.F. Gao, Z. Lin, G.L. Chen, Microstructure and tensile properties of as-cast Ti–45Al–(8–9)Nb–(W, B, Y) alloy Journal of Alloys and Compounds. ,vol. 414, pp. 131- 136 ,(2006) , 10.1016/J.JALLCOM.2005.02.110
I.S. Jung, H.S. Jang, M.H. Oh, J.H. Lee, D.M. Wee, Microstructure control of TiAl alloys containing β stabilizers by directional solidification Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 329, pp. 13- 18 ,(2002) , 10.1016/S0921-5093(01)01494-0
M Yamaguchi, D.R Johnson, H.N Lee, H Inui, Directional solidification of TiAl-base alloys Intermetallics. ,vol. 8, pp. 511- 517 ,(2000) , 10.1016/S0966-9795(99)00157-0
M. Yoshihara, K. Miura, Effects of Nb addition on oxidation behavior of TiAl Intermetallics. ,vol. 3, pp. 357- 363 ,(1995) , 10.1016/0966-9795(95)94254-C
J.H. Kim, S.W. Kim, H.N. Lee, M.H. Oh, H. Inui, D.M. Wee, Effects of Si and C additions on the thermal stability of directionally solidified TiAl–Nb alloys Intermetallics. ,vol. 13, pp. 1038- 1047 ,(2005) , 10.1016/J.INTERMET.2004.10.010
X.J. Xu, J.P. Lin, Y.L. Wang, J.F. Gao, Z. Lin, G.L. Chen, Effect of forging on microstructure and tensile properties of Ti-45Al-(8–9)Nb-(W,B,Y) alloy Journal of Alloys and Compounds. ,vol. 414, pp. 175- 180 ,(2006) , 10.1016/J.JALLCOM.2005.03.121