Strain Analysis on Porous TiNi SMA Using SEM Moiré Method


Article Preview

In this paper, a new technique for fabricating grating on the surface of porous TiNi SMA is proposed. The grating is directly written onto the surface of the specimen using the FIB milling. No photoresist is required during the lithography process. From the experimental results, it can be obviously seen that the grating fabricated by FIB milling has a better quality than that by electron beam lithography. Using the self-made FIB grating, the in-plane deformation of the porous TiNi SMA in microscale is studied by SEM moiré method. Moiré and the microscopical structures are synchronously observed, including microcracks, martensites and grain boundaries.



Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim




H. Du et al., "Strain Analysis on Porous TiNi SMA Using SEM Moiré Method", Key Engineering Materials, Vols. 326-328, pp. 79-82, 2006

Online since:

December 2006




[1] Lorna J. Gibson, Michael F. Ashby. Cellular Solids: Structure and properties. Press Syndicate of the University of Cambridge, (1997).

[2] Read, DT, Dally, JW. Theory of moiré fringe formation with an electron beam. SOLID MECH APPL 82: 99-108, (2000).

[3] Huang Bingmin, Zheng Yufeng, etc. The Microstructure and Superelasticity of Cold Worked TiNi Alloy, Aerospace Materials & Technology, 1997, 6: 51-54. Fig. 7(b) Strain of V field Fig. 7(c) Shear strain distribution Fig. 7(a) Strain of U field.