Precipitation processes in near-equiatomic TiNi shape memory alloys

Minoru Nishida; C. M. Wayman; T. Honma

doi:10.1007/BF02650086

Precipitation processes in near-equiatomic TiNi shape memory alloys

Minoru Nishida, C. M. Wayman, T. Honma

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

430 Citations (Scopus)

Abstract

Metallographic studies have been made of precipitation processes in Ti-50 pct Ni and Ti-52 pct Ni (at. pct) shape memory alloys. The eutectoid and peritectoid reactions previously reported for near-equiatomic and Ni-rich TiNi alloys were not observed for either composition. In the Ti-52Ni alloy, diffusional transformations take place, similar to those in supersaturated alloys. The precipitation sequence can be written as β ₀ → Ti ₁₁ Ni ₁₄ → Ti ₂ Ni ₃ → TiNi ₃ . The solidus line of the TiNi phase in the Ti-52Ni alloy lies at 812 ± 22 °C. Morphological characteristics of the various precipitate phases are described in detail.

Original language	English
Pages (from-to)	1505-1515
Number of pages	11
Journal	Metallurgical Transactions A
Volume	17
Issue number	9
DOIs	https://doi.org/10.1007/BF02650086
Publication status	Published - Sept 1 1986
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering(all)

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10.1007/BF02650086

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title = "Precipitation processes in near-equiatomic TiNi shape memory alloys",

abstract = " Metallographic studies have been made of precipitation processes in Ti-50 pct Ni and Ti-52 pct Ni (at. pct) shape memory alloys. The eutectoid and peritectoid reactions previously reported for near-equiatomic and Ni-rich TiNi alloys were not observed for either composition. In the Ti-52Ni alloy, diffusional transformations take place, similar to those in supersaturated alloys. The precipitation sequence can be written as β 0 → Ti 11 Ni 14 → Ti 2 Ni 3 → TiNi 3 . The solidus line of the TiNi phase in the Ti-52Ni alloy lies at 812 ± 22 °C. Morphological characteristics of the various precipitate phases are described in detail.",

author = "Minoru Nishida and Wayman, {C. M.} and T. Honma",

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AU - Nishida, Minoru

AU - Wayman, C. M.

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N2 - Metallographic studies have been made of precipitation processes in Ti-50 pct Ni and Ti-52 pct Ni (at. pct) shape memory alloys. The eutectoid and peritectoid reactions previously reported for near-equiatomic and Ni-rich TiNi alloys were not observed for either composition. In the Ti-52Ni alloy, diffusional transformations take place, similar to those in supersaturated alloys. The precipitation sequence can be written as β 0 → Ti 11 Ni 14 → Ti 2 Ni 3 → TiNi 3 . The solidus line of the TiNi phase in the Ti-52Ni alloy lies at 812 ± 22 °C. Morphological characteristics of the various precipitate phases are described in detail.

AB - Metallographic studies have been made of precipitation processes in Ti-50 pct Ni and Ti-52 pct Ni (at. pct) shape memory alloys. The eutectoid and peritectoid reactions previously reported for near-equiatomic and Ni-rich TiNi alloys were not observed for either composition. In the Ti-52Ni alloy, diffusional transformations take place, similar to those in supersaturated alloys. The precipitation sequence can be written as β 0 → Ti 11 Ni 14 → Ti 2 Ni 3 → TiNi 3 . The solidus line of the TiNi phase in the Ti-52Ni alloy lies at 812 ± 22 °C. Morphological characteristics of the various precipitate phases are described in detail.

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Precipitation processes in near-equiatomic TiNi shape memory alloys

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