Report Texture Characterization of FeMn Shape Memory Alloys

R. E. BOLMARO, A. V DRUKER, H.-G. BROKMEIER AND W. M. GAN

2007-04-01/2007-04-03

235-236

Física

Metalurgia

FeMn Shape Memory Alloys (SMA) are promising materials for technological applications for tube sealing and joints. Due to its characteristic anisotropy it is known that textures should play a role on the recovery properties. The current experiments are devoted to study texture development due to different rolling thermo-mechanical processes applied to FeMn SMA. Rolling is usually idealized as a plane strain deformation process. However, friction with rolling tools and geometric compatibility render heterogeneous deformation fields. Textures are usually heterogeneous through the thickness of the rolled sheets. Because of the high absorption presented by Fe for Cu X ray radiation the usual X ray diffraction tools can be used to characterize local through thickness textures. On the contrary, obtaining average textures is not feasible and a high penetration technique, as neutron diffraction, is needed. We will use those capabilities on the current experiments.