A transmission electron microscopy procedure for in-situ straining of miniature pseudoelastic NiTi specimens

Olbricht, J.; Wagner, M.F.-X.; Condó, A.; Dlouhy, A.; Groß mann, C.; Kröger, A.; Somsen, C.; Eggeler, G.

doi:10.3139/146.101744

A transmission electron microscopy procedure for in-situ straining of miniature pseudoelastic NiTi specimens (bibtex)

by J. Olbricht, M.F.-X. Wagner, A. Condó, A. Dlouhy, C. Groß mann, A. Kröger, C. Somsen, G. Eggeler

Abstract:

The in-situ transmission electron microscopy technique allows direct observations of formation and growth of stress-induced martensite in pseudoelastic NiTi shape memory alloys. The present paper reports on the development of a miniature test procedure for in-situ straining experiments with specimens taken from small components. The deformation of an ultra-fine grained NiTi specimen is characterised by transmission electron microscopy (at early loading stages) and by optical microscopy (at larger strains). A complementary finite element analysis of the complex strain state in the specimen rationalises why the stress-induced martensitic transformation first occurs in the thin foil region of the specimen before spreading towards the outer rim of the specimen.

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Reference:

Olbricht, J., Wagner, M.F.-X., Condó, A., Dlouhy, A., Groß mann, C., Kröger, A., Somsen, C., Eggeler, G.: A transmission electron microscopy procedure for in-situ straining of miniature pseudoelastic NiTi specimens, International Journal of Materials Research 99, 1150-1156, 2008.

Bibtex Entry:

@Article{Olbricht2008,
  Title                    = {{A transmission electron microscopy procedure for in-situ straining of miniature pseudoelastic {NiTi} specimens}},
  Author                   = {Olbricht, J. and Wagner, M.F.-X. and Cond\'{o}, A. and Dlouhy, A. and Gro\ss mann, C. and Kr\"{o}ger, A. and Somsen, C. and Eggeler, G.},
  Journal                  = {International Journal of Materials Research},
  Year                     = {2008},
  Number                   = {10},
  Pages                    = {1150--1156},
  Volume                   = {99},

  Abstract                 = {The in-situ transmission electron microscopy technique allows direct observations of formation and growth of stress-induced martensite in pseudoelastic NiTi shape memory alloys. The present paper reports on the development of a miniature test procedure for in-situ straining experiments with specimens taken from small components. The deformation of an ultra-fine grained NiTi specimen is characterised by transmission electron microscopy (at early loading stages) and by optical microscopy (at larger strains). A complementary finite element analysis of the complex strain state in the specimen rationalises why the stress-induced martensitic transformation first occurs in the thin foil region of the specimen before spreading towards the outer rim of the specimen.},
  Doi                      = {10.3139/146.101744},
  ISSN                     = {1862-5282},
  Url                      = {http://www.hanser-elibrary.com/doi/abs/10.3139/146.101744}
}