Journal ArticleDOI
Dynamic compaction of titanium aluminides by explosively generated shock waves: Microstructure and mechanical properties
TLDR
In this article, a detailed microstructural analysis and evaluation of the mechanical properties of titanium aluminides consolidated by novel shock processes is presented, and the fracture modes are correlated with the micro-structural observations.Abstract:
A detailed microstructural analysis and evaluation of the mechanical properties of titanium aluminides consolidated by novel shock processes[13] are presented. Successful consolidation was obtained and was evidenced by strong bonding between individual particles. Additions of Nb and Ti and Al elemental powders resulted in enhanced interparticle bonding through intense plastic deformation of Nb and shock-induced reactions between Ti and Al. Rapid cooling of interparticle molten layers yielded amorphous Ti-Al alloys; this interparticle melting and rapid cooling are a unique feature of shock processing. Embrittlement of individual particles of Ti3Al-based alloy after exposure to 550 °C and 750 °C was observed. There is evidence of phase transformation after preheating the powder, and this fact can explain the high density of cracks obtained with this alloy after high-temperature shock consolidation. Mechanical properties of the Ti3Al-based alloy were determined at room temperature and the fracture modes were studied. The microstructural observations are correlated with the mechanical properties.read more
Citations
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Book ChapterDOI
Combustion Synthesis of Advanced Materials: Principles and Applications
TL;DR: Combustion synthesis is an attractive technique to synthesize a wide variety of advanced materials including powders and near-net shape products of ceramics, intermetallics, composites, and functionally graded materials as discussed by the authors.
Journal ArticleDOI
The shock Hugoniot of the intermetallic alloy Ti-46.5Al-2Nb-2Cr
TL;DR: In this paper, plate impact experiments were conducted on a γ-titanium aluminide (TiAl) based ordered intermetallic alloy, where stress measurements were recorded using manganin stress gauges supported on the back of TiAl targets using polymethylmethacrylate windows.
Journal ArticleDOI
The response of TiAl based alloys to one-dimensional shock loading
TL;DR: In this paper, the behavior of two different alloys based on the intermetallic phase TiAl, with different microstructures and grain sizes have been investigated during shock loading, and significant differences in the equation of state (stress-shock velocity-particle velocity), one-dimensional yield strength and shear strength have been observed.
Journal ArticleDOI
Dynamic compaction of calcium phosphate biomaterials
M. Trecant,Guy Daculsi,M. Leroy +2 more
TL;DR: In this paper, a detailed study of hydroxyapatite compacts was carried out to determine shock compaction parameters, and the results showed that dynamic compaction could extend the range of bioceramics.
Journal ArticleDOI
Historical perspective and contribution of US researchers into the field of self-propagating high-temperature synthesis (SHS)/combustion synthesis (CS): Personal reflections
TL;DR: This paper presented an historical perspective and contributions of U.S. researchers into the field of self-propagating high-temperature synthesis (SHS)/Combustion Synthesis (CS) and personal reflections of the authors from about 1976 to the present for a special meeting in Chernogolovka, Russia -SHS-40 -celebrating 40 years of SHS research.
References
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Book
Theory of elasticity
TL;DR: The theory of the slipline field is used in this article to solve the problem of stable and non-stressed problems in plane strains in a plane-strain scenario.
High-temperature ordered intermetallic alloys
TL;DR: In this article, the authors describe the behavior of grain boundaries in a two-dimensional model ordered alloy and the effects of elastic anisotropy on the anomalious yield behavior of cubic ordered alloys.
Journal ArticleDOI
A new ordered orthorhombic phase in a Ti3AlNb alloy
TL;DR: An ordered orthorhombic phase has been detected in a Ti-25at.% Al-12.5at. alloy as discussed by the authors, which is one of a family of Ti3Al base alloys under development for high temperature applications.
Journal ArticleDOI
Concentration of Stress Around Spherical and Cylindrical Inclusions and Flaws
Journal ArticleDOI
The deformation and fracture of TiAl at elevated temperatures
TL;DR: In this paper, the tensile properties of the intermetallic compound TiAl have been determined at several temperatures in the range 25 to 1000°C, and the results indicate that the ductilebrittle transition behavior of TiAl at about 700°C is controlled by the trailinga/6 [112] partial dislocation components of the superdislocations overcoming their pinning barriers.
Related Papers (5)
Rate and environmental effects on fracture of a two-phase TiAl-alloy
Kwai S. Chan,Young-Won Kim +1 more