Study of the transitory formation of a1 bainite, as a precursor of a-phase in tempered SMAs

Leandru G. Bujoreanu; Sergiu Stanciu; Paul Bârsănescu; Nicoleta M. Lohan

doi:10.1117/12.823620

6 January 2009 Study of the transitory formation of α₁ bainite, as a precursor of α-phase in tempered SMAs

Leandru G. Bujoreanu, Sergiu Stanciu, Paul Bârsănescu, Nicoleta M. Lohan

Proceedings Volume 7297, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IV; 72970B (2009) https://doi.org/10.1117/12.823620
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IV, 2008, Constanta, Romania

Abstract

Bainite transitory formation, during the heating of a martensitic copper base SMA, was predicted by DSC and DTA and confirmed by XRD, OM and TEM only in hot pressed air cooled state homogenized and tempered at 573 K. In this heat treatment state, due to the pre-existence of α-phase, bainite amount is expected to be too low, therefore non-distinguishable, for higher tempering temperatures, where it is suggested that transitory α1 bainite turned to equilibrium α-phase. The results suggest that bainite formation could be considered as a precursory of α-phase phase during the heating of Cu-Zn-Al martensitic alloys, with no pre-existing α.

Citation Download Citation

Leandru G. Bujoreanu, Sergiu Stanciu, Paul Bârsănescu, and Nicoleta M. Lohan "Study of the transitory formation of α₁ bainite, as a precursor of α-phase in tempered SMAs", Proc. SPIE 7297, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IV, 72970B (6 January 2009); https://doi.org/10.1117/12.823620

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