Image icon  Ductile tearing near a fracture surface in polycarbonate

 
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Description: The fracture surface is dominated by ductile tearing, and also shows linear voids with fine transverse filaments. These are the remnants of crazes which act both as a precursor to cracking and as a toughening mechanism. In some areas, more angular brittle fracture surfaces are also apparent. The fine-scale ridging of the surface, parallel to the principal stress direction (which is approximately vertical) morphology is the result of fibrous crystals being induced by cold-drawing.
Keywords: craze • ductile • ductile tearing • fibril • fracture • polycarbonate (PC) • polymer
Categories: Science approaches > Deformation & failure > Fracture
Science approaches > Microstructure
Materials > Polymers & elastomers > Plastics > Thermoplastics > Polycarbonate (PC)
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: J A Curran, Department of Materials Science and Metallurgy, University of Cambridge
DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 03 October 2002
Date added: 21 August 2009
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Resource ID: 1626