Crack Paths 2012

Figure 6: Stretch zone in a ductile cast iron. (a) 2D S E Mmicrograph taken in SE

contrast. (b) 3D anaglyph image. (c) Height profile along the measuring line indicated

in (a) with the measurement of the stretch zone width (SZW)and stretch zone height

(SZH).

R E F E R E N C E S

[1] Roos, E.: Fracture mechanics integrity analyses. DVM-Bericht 243, 153-162.

[2] Heerens, J.; Cornec, A.; Schwalbe K.-H.: Results of a round robin on stretch zone

width determination. (1987) Fat. Fract. Engng Mater. Struct. 11, 19-29.

[3] Sreenivasan, P.R., Ray, S.K. Vaidyanathan, S. And Rodriguez, P. Measurement of

stretch zone height and its relationship to crack tip opening displacement and

initiation J-value in an AISI 316 stainless steel. (1996) Fat. Frac. Eng. Mater. Struc.

19, 855-868.

[4] Pluvinage, G.; Lanvin, A.: Stretch zone geometrical measurement a particular way

to measure fracture toughness (1993) Fat. Frac. Eng. Mater. Struc. 16, 955-972.

[5] Stampfl, J.; Scherer, S.; Berchthaler, M.; Gruber, M.; Kolednik, O.: Determination

of the fracure tougness by automatic image processing. (1996) Int. J. of Frac. 78,

35-44.

[6] Tarpani, J.R., Bose. W.W. and Spinelli, D. Backscattered electron microscopy

technique enhancing stretch zone widfth imaging for initiation fracture toughness

measurements (2003) Mat. Charact. 51, 159-170.

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