τ phase formation in a TiC+TiB2 composite bonded with a nickel based binder alloy

A. A. Ogwu; T. J. Davies

doi:10.1016/S1359-6462(99)00072-X

τ phase formation in a TiC+TiB₂ composite bonded with a nickel based binder alloy

A. A. Ogwu, T. J. Davies

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Attempts to understand the formation mechanism and to inhibit formation of the embrittling τ-phase in a Ti-C-B-Ni system is reported. An initial dilatometric study and differential thermal analysis was carried out under an argon atmosphere. Qualitative scanning transmission electron microscopy (STEM) studies in the elemental mode was conducted to detect and identify phases on grain boundaries. Based on the three point bend strengths and the fracture toughness improvements, it is possible that the observed grain boundary phases are not an embrittling τ-phase. The τ-phase would have formed under equilibrium conditions, while other phases form preferentially under non-equilibrium conditions.

Original language	English
Pages (from-to)	1377-1380
Number of pages	4
Journal	Scripta Materialia
Volume	40
Issue number	12
DOIs	https://doi.org/10.1016/S1359-6462(99)00072-X
Publication status	Published - May 21 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/S1359-6462(99)00072-X

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abstract = "Attempts to understand the formation mechanism and to inhibit formation of the embrittling τ-phase in a Ti-C-B-Ni system is reported. An initial dilatometric study and differential thermal analysis was carried out under an argon atmosphere. Qualitative scanning transmission electron microscopy (STEM) studies in the elemental mode was conducted to detect and identify phases on grain boundaries. Based on the three point bend strengths and the fracture toughness improvements, it is possible that the observed grain boundary phases are not an embrittling τ-phase. The τ-phase would have formed under equilibrium conditions, while other phases form preferentially under non-equilibrium conditions.",

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AU - Davies, T. J.

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N2 - Attempts to understand the formation mechanism and to inhibit formation of the embrittling τ-phase in a Ti-C-B-Ni system is reported. An initial dilatometric study and differential thermal analysis was carried out under an argon atmosphere. Qualitative scanning transmission electron microscopy (STEM) studies in the elemental mode was conducted to detect and identify phases on grain boundaries. Based on the three point bend strengths and the fracture toughness improvements, it is possible that the observed grain boundary phases are not an embrittling τ-phase. The τ-phase would have formed under equilibrium conditions, while other phases form preferentially under non-equilibrium conditions.

AB - Attempts to understand the formation mechanism and to inhibit formation of the embrittling τ-phase in a Ti-C-B-Ni system is reported. An initial dilatometric study and differential thermal analysis was carried out under an argon atmosphere. Qualitative scanning transmission electron microscopy (STEM) studies in the elemental mode was conducted to detect and identify phases on grain boundaries. Based on the three point bend strengths and the fracture toughness improvements, it is possible that the observed grain boundary phases are not an embrittling τ-phase. The τ-phase would have formed under equilibrium conditions, while other phases form preferentially under non-equilibrium conditions.

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τ phase formation in a TiC+TiB₂ composite bonded with a nickel based binder alloy

Abstract

All Science Journal Classification (ASJC) codes

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