Phase decomposition in a β Cu–Zn–Al–Ti–B shape memory alloy

A β Cu–Zn–Al, with and without TiB addition as grain refining, shape memory alloy has been investigated with detail in order to evaluate the influence of this grain refiner on some alloy properties. For Cu–Zn–Al–Ti–B, on isothermal aging in the range of 523–773 K, the β phase was found to decompose...

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Veröffentlicht in:	Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2005-02, Vol.392 (1), p.386-393
Hauptverfasser:	Furlani, A.M., Stipcich, M., Romero, R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Cross-disciplinary physics: materials science rheology Cu–Zn–Al shape memory based alloys Exact sciences and technology Grain refinement of Cu based alloys Materials science Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Precipitation β phase decomposition
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Beschreibung
Zusammenfassung:	A β Cu–Zn–Al, with and without TiB addition as grain refining, shape memory alloy has been investigated with detail in order to evaluate the influence of this grain refiner on some alloy properties. For Cu–Zn–Al–Ti–B, on isothermal aging in the range of 523–773 K, the β phase was found to decompose by the precipitation of γ phase followed by α phase and eutectoid decomposition. The γ precipitate volume fraction evolution as a function of aging time has been determined and the TTT diagram for the precipitation of both γ and α phases has been constructed. Besides, nonisothermal aging behavior has been investigated by means of differential scanning calorimetry for Cu–Zn–Al and Cu–Zn–Al–Ti–B alloys.
ISSN:	0921-5093 1873-4936
DOI:	10.1016/j.msea.2004.10.015