J. Phys. IV France 112 (2003) 1071
The effect of composition and stress on the selection of transformation modes in MnAl-CA.S. Sologubenko, P. Müllner, H. Heinrich, M. Woligarten and G. Kostorz
ETH Zurich, Institute of Applied Physics, 8093 Zürch, Switzeriand
The transformation in MnAl-C alloys was studied by metallographic methods and by transmission electron microscopy. The product phase appears in two morphologies. A "flower-like" morphology results from a massive transformation whereas a "plate-like" morphology results from a shear reaction. The shear reaction appears preferentially in alloys with large amounts of Mn and C. Annealing under a suitable uniaxial compressive stress accelerates the operation of the shear mode.
© EDP Sciences 2003