Investigation of Luders-Like Deformation Bands in NiTi Shape Memory Alloys
Prof. Xiaodong Han1, ShengCheng Mao1, Ze Zhang1 and Dr. Ming H. Wu2, 1Institute of Microstructure & Property for Advanced Materials, Beijing University of Technology, Ping Le Yuan #100, Beijing, 100022, China, 2Memry Coporation, 3 Berkshire Blvd., Bethel, CT 06801

The Luders-like deformation bands in a super-elastic NiTi drawn wire form by uni-axial tensial tests. They are studied by in-situ scanning electron microscopy (SEM) equipped with an automated electron backscattered diffraction (EBSD) system. The crystallographic features of the Luders-like deformation bands are characterized. The textural, orientation and grain boundary features in the elastic, plastic and the front regions of the Luders-like deformation bands are spatially mapped. The grain (crystallographic lattice)’s rotation, shear and extension were studied as a function of extensile strain. The Luders-like deformation bands in the NiTi alloy are detailed characterized from the crystallographic view points.

Meet the Authors Poster Session

The Preliminary Program for The International Conference on Shape Memory and Superelastic Technologies (May 7-11, 2006)