Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-20T01:37:25.915Z Has data issue: false hasContentIssue false
  • English
  • Français

Grain Refinement of γ-TiAl Based Alloys by Inoculation

Published online by Cambridge University Press:  01 February 2011

Daniel-Hendrik Gosslar ,
Robert Güenther ,
Christian Hartig ,
Rüediger Bormann ,
Julien Zollinger  and
Ingo Steinbach
Daniel-Hendrik Gosslar
Affiliation:
[email protected], Hamburg University of Technology, Institute of Material Science and Technology, Hamburg, Germany
Robert Güenther
Affiliation:
[email protected], Hamburg University of Technology, Institute of Material Science and Technology, Hamburg, Germany
Christian Hartig
Affiliation:
[email protected], Hamburg University of Technology, Institute of Material Science and Technology, Hamburg, Germany
Rüediger Bormann
Affiliation:
[email protected], Hamburg University of Technology, Institute of Material Science and Technology, Hamburg, Germany
Julien Zollinger
Affiliation:
[email protected], RWTH-Aachen, Access e.V, Aachen, Germany
Ingo Steinbach
Affiliation:
[email protected], Ruhr-University Bochum, Interdisciplinary Centre for Advanced Materials Simulation, Bochum, United States
Get access

Abstract

A significant grain refinement is achieved for a Ti-45Al (at.%) alloy via the addition of a novel Ti-Al-TiB2 master alloy. This refinement is attributed to a low lattice mismatch of TiB2 with the primary solidifying phase and its thermodynamic stability. Model calculations allow for the prediction of the grain size as a function of cooling rate, alloy constitution and particle size distribution and content. However, the model predictions are smaller than the experimentally observed grain size since the fraction of effective particles is overestimated.

Keywords

castinggrain sizesimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1128: Symposium U – Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications , 2008 , 1128-U03-02
Copyright
Copyright © Materials Research Society 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]. Kestler, H. and Clemens, H. in Production, Processing and Application of g(TiAl)-Based Alloys, Titanium and Titanium Alloys, edited by Leyens, C. and Peters, M., (Wiley-VCH, Weinheim Germany, 2003) p. 35.Google Scholar
[2]. Smarsly, W. and Singheiser, L., J. Mat. Adv. Power Eng., Part II, 1731 (1994).Google Scholar
[3]. Kim, Y. and Dimiduk, D., in Structural Intermetallics, ed. Nathal, M. et al. (TMS), Warrendale, PA, (1997) p. 531.Google Scholar
[4]. Hecht, U. et al., Intermetallics 16, 969 (2008).Google Scholar
[5]. Zollinger, J. et al., presented at the DFG Summer School within the SPP No. 1296 Programme, Herzogenrath, Germany, 2008 (unpublished).Google Scholar
[6]. Flemings, M., Solidification Processing, (McGraw-Hill, New York, 1974), p. 299.Google Scholar
[7]. Kitkamthorn, U. et al., Intermetallics 14, 759 (2006).Google Scholar
[8]. Reynolds, J. and Tottle, C., J. Inst. Metals 80, 1328 (1951).Google Scholar
[9]. Witusiewicz, V. et al., J. Alloy Comp., in Press (2008).Google Scholar
[10]. Greer, L. et al., Acta. Mater. 48, 2823 (2000).Google Scholar
[11]. Guenther, R. et al., Acta. Mater. 54, 5591 (2006).Google Scholar
[12]. Egry, I. et al., Int. J. Thermophys. 28, 1026 (2008).Google Scholar
[13]. Eremenko, V. et al., Fizika Khim. Mekh. Mater. 14, 3 (1978).Google Scholar
[14]. Imayev, R. et al., Intermetallics 15, 451 (2007).Google Scholar
[15]. Zollinger, J., PhD. Thesis, Institut National Polytechnique de Lorraine (NPL), (2008).Google Scholar
[16]. Quested, T., PhD. Thesis, University of Cambridge, (2005).Google Scholar
[17]. Hyman, M. et al., Metall. Trans. 22A, 1647 (1991).Google Scholar