The mechanical properties of the Ni3Al-25% TiN composite

Ni3Al-TiN composites were prepared by nitriding powders in the Ni-Ti-Al system. Samples were then prepared from the composites by hot isostatic pressing (1250 C, 180 MPa), mechanical testing of samples was carried out by three-point bending in the temperature range 20-1100 C, and hardness was also m...

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Veröffentlicht in:	Journal of materials science letters 1991, Vol.10 (17), p.1011-1012
Hauptverfasser:	BARINOV, S. M, KUZNETZOV, A. V, SHEVCHENKO, V. YA, KOTENEV, V. I, KASIMTSEV, A. V
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: structure, mechanical and thermal properties Deformation and plasticity (including yield, ductility, and superplasticity) Exact sciences and technology Mechanical and acoustical properties of condensed matter Mechanical properties of solids Metals. Metallurgy Physics
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Ni3Al-TiN composites were prepared by nitriding powders in the Ni-Ti-Al system. Samples were then prepared from the composites by hot isostatic pressing (1250 C, 180 MPa), mechanical testing of samples was carried out by three-point bending in the temperature range 20-1100 C, and hardness was also measured. A 25% TiN content gave a 40% strength increase, but 85% TiN reduced strength and deformation at fracture. This reduction was attributed to residual porosity. Above 700 C the plasticity of the 25% TiN composite exceeded that of the matrix, and the fracture toughness of the same composite had a maximum value of 24 MPam1/2. The material had good oxidation resistance up to 900 C. 10 refs.
ISSN:	0261-8028 1573-4811
DOI:	10.1007/BF00721830