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STRETCH ZONE GEOMETRICAL MEASUREMENT, A PARTICULAR WAY TO MEASURE FRACTURE TOUGHNESS
Author(s) -
Pluvinage G.,
Lanvin A.
Publication year - 1993
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1993.tb00131.x
Subject(s) - materials science , fracture toughness , transmission electron microscopy , plating (geology) , geometry , surface finish , composite material , toughness , fracture (geology) , measure (data warehouse) , yield (engineering) , electron microscope , optics , geology , mathematics , nanotechnology , physics , geophysics , database , computer science
Stretch zone geometry (height and length) has been measured using five methods (Transmission Electron Microscopy, Retrodiffused Electron Microscopy, Nickel Plating, Roughness Measurement, Ondulation Method). Experimental investigations show that the major difficulty of these measurements is the great scatter of experimental results. However, it is seen that Transmission Electron Microscopy and Nickel Plating give sufficiently accurate results. By using these different methods, we have found a linear relationship between stretch zone geometry and the classical fracture toughness parameter J IC . Rolling direction, grain size, loading rate, yield stress and the material texture are the influential parameters determining the stretch zone geometry.