Improvement of microstructure and mechanical properties of TiAl−Nb alloy by adding Fe element
作者： Yong YANG , He-ping FENG , Qi WANG , Rui-run CHEN , Jing-jie GUO
DOI: 10.1016/S1003-6326(20)65298-0
关键词: Compressive strength 、 Composite material 、 Microstructure 、 Solid solution strengthening 、 Alloy 、 Grain size 、 Materials science 、 Fe element
摘要: Abstract In order to improve mechanical properties and optimize composition of TiAl−Nb alloys, Ti46Al5Nb0.1B alloys with different contents Fe (0, 0.3, 0.5, 0.7, 0.9, 1.1 at.%) were prepared by melting. Macro/microstructure compression the systematically investigated. Results show that element can decrease grain size, aggravate Al-segregation also form Fe-rich B2 phase in interdendritic area. Compressive testing results indicate Ti46Al5Nb0.1B0.3Fe alloy shows highest ultimate compressive strength fracture strain, which are 1869.5 MPa 33.53%, respectively. The improved is ascribed refinement solid solution strengthening Fe, strain due reduced lattice tetragonality γ alloys. However, excessive addition decreases caused severe Al-segregation.
sci-hub.st 参考文章(35)
Ivo Dlouhý, Zdenĕk Chlup, Hynek Hadraba, Vladislav Kozák, Fracture Behaviour of TiAl Intermetalics Springer, Dordrecht. pp. 265- 274 ,(2009) , 10.1007/978-90-481-2669-9_28
Thomas Klein, Michael Schachermayer, Francisca Mendez-Martin, Thomas Schöberl, Boryana Rashkova, Helmut Clemens, Svea Mayer, Carbon distribution in multi-phase γ-TiAl based alloys and its influence on mechanical properties and phase formation Acta Materialia. ,vol. 94, pp. 205- 213 ,(2015) , 10.1016/J.ACTAMAT.2015.04.055
Yang Huimin, Su Yanqing, Luo Liangshun, Chen Hui, Guo Jingjie, Fu Hengzhi, Influences of Fe and B on the Columnar Structure of Ti-46Al Alloys Rare Metal Materials and Engineering. ,vol. 41, pp. 570- 574 ,(2012) , 10.1016/S1875-5372(12)60038-1
Shili Shu, Feng Qiu, Cunzhu Tong, Xiaonan Shan, Qichuan Jiang, Effects of Fe, Co and Ni elements on the ductility of TiAl alloy Journal of Alloys and Compounds. ,vol. 617, pp. 302- 305 ,(2014) , 10.1016/J.JALLCOM.2014.07.199
S Nishikiori, K Matsuda, Y.G Nakagawa, Microstructural effects on tensile properties of cast TiAl–Fe–V–B alloy Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 239, pp. 592- 599 ,(1997) , 10.1016/S0921-5093(97)00635-7
Qiuqi Duan, Qingdong Luan, Jing Liu, Liangming Peng, Microstructure and mechanical properties of directionally solidified high-Nb containing Ti–Al alloys Materials & Design. ,vol. 31, pp. 3499- 3503 ,(2010) , 10.1016/J.MATDES.2010.02.022
Y.L Hao, R Yang, Y.Y Cui, D Li, The effect of Ti/Al ratio on the site occupancies of alloying elements in γ-TiAl Intermetallics. ,vol. 8, pp. 633- 636 ,(2000) , 10.1016/S0966-9795(99)00138-7
K. S. Chan, Toughening mechanisms in titanium aluminides Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science. ,vol. 24, pp. 569- 583 ,(1993) , 10.1007/BF02656627
Norman L. Allinger, Xuefeng Zhou, John Bergsma, Molecular mechanics parameters Journal of Molecular Structure-theochem. ,vol. 312, pp. 69- 83 ,(1994) , 10.1016/S0166-1280(09)80008-0
Z.C. Liu, J.P. Lin, S.J. Li, G.L. Chen, Effects of Nb and Al on the microstructures and mechanical properties of high Nb containing TiAl base alloys Intermetallics. ,vol. 10, pp. 653- 659 ,(2002) , 10.1016/S0966-9795(02)00037-7