Peculiarities of Thermoelastic Martensitic Transformation in the Cu-Zn-Al and Cu-Zn-Al-V after Decomposition of the β-Solid Solution

V. Zel'dovich, I. Khomskaya, N. Frolova, T. V. Novoselova
1997 Journal de Physique IV : Proceedings  
Dilatometric, metallographic, and electron-microscopic methods were used to study martensitic transformations in Cu-Zn-Al alloys that were subjected to a heat treatment to the decomposition of f3 solid solution at temperatures of a-phase precipitation (635-530°C) and bainite formation (300-125 OC). The partial decomposition and the accompanying redistribution of the components were shown to alter the type of martensitic transformation from nonthermoelastic to thermoelastic with a corresponding
more » ... th a corresponding change in the martensite morphology from plate type to needle type (spear-shaped). A decrease in the temperature of isothermal anneal in the a+p range from 600 to 530°C substantially decrease the M, temperature (by 140 OC). The temperature hysteresis of the transformation changes from 0 to 70 K.
doi:10.1051/jp4:1997528 fatcat:gzk5h67mcvhxpm6mqm4274on5i