Effect of TiH2 on the Microstructures and Refining Performance of Al-Ti-C Master Alloy


Article Preview

Al-Ti-C master alloy with or without the TiH2 was prepared by Self-propagating High-temperature Synthesis (SHS) induced by laser. The phases, composition, microstructure morphologies of master alloy and its thermal reaction process were investigated by XRD, EPMA, DTA and SEM. The results show that adding TiH2 has obvious effect in promoting the synthesizing reaction of Al-Ti-C master alloys. Active Ti atoms and catalyzing H atoms released by TiH2 thermal decomposition cause critical reacting temperature of the SHS decreasing. The addition of TiH2 affects the morphologies and distribution of TiAl3 and TiC particles (size of TiC was smaller than 1μm in diameter), and restrains the congregating tendency of TiC particles. The refining test on aluminum indicates that master alloys with TiH2 possesses more excellent grain refining perfprmance than without, because of the composition and morphology of the master alloy is cut out for refining processing.



Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee




H. Y. Zhuang and X. M. Pan, "Effect of TiH2 on the Microstructures and Refining Performance of Al-Ti-C Master Alloy", Materials Science Forum, Vols. 561-565, pp. 329-332, 2007

Online since:

October 2007




[1] Z.H. Zhang, X.F. Bian, Y. Wang, et al., J. Alloys Compd. 349 (2003)121.

[2] F. Gazanion, X.G. Chen, C. Dupuis, Mater. Sci. Forum 396-402(2002) 45.

[3] Merzhanov AG, Shkiro VM, Borovinskaya IP, Certif. USSR No. 255221, (1967).

[4] Goldschmidt H, German patent No. 96317, 1895.

[5] Munir ZA, Anselmi-Tamburini U. Mater Sci Rep 1989; 3: 277.

[6] V. Bhosle, E.G. Baburaj, M. Miranova, K. Salama, Dehydrogenation of nanocrystalline TiH2 and consequent consolidation to form dense Ti, Metall. Mater. Trans. A 34 (2003) 2793.

DOI: 10.1007/s11661-003-0180-3

[7] Bhosle V., Baburaj E. G., Miranova M. Dehydrogenation of TiH2 [J] . Mater. Sci. Eng. A , 356(2003): 190.

[8] Adler PN , Schulte RL , Schneid EJ , et al. Leuterium Surface Segregation in Titanium Alloys[J ] . Met Trans , 21(1990) : 203.

[9] Nobuko H , Takauki I , Shin2Ichi O , et al. Correlation Between Hydrogen Storage Properties and St ructural Characteristics in Mechanically Milled Magnesium Hydride MgH2 [J] . Journal of Alloys and Compounds , 366(2004): 269.

DOI: 10.1016/s0925-8388(03)00734-5

[10] Lukas H. Viewing the Early Stage of Metal Foam Formation by Computed Tomography Using Synchrotron Radiation. Advanced Engineering Materials, 10(2002) : 808. a b c.

Fetching data from Crossref.
This may take some time to load.