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Title : Magnesium alloy, fracture surface

Description : This micrograph shows the brittle nature associated with the grain boundary phase, rich in zinc and rare earths. During tensile testing below 200°C the grains deform plastically but the boundaries remain elastic. This manifests itself with the growth of voids at the grain boundary phase/grain interface which link up and cause failure by the brittle intergranular fracture mode III method. Here the grain boundary phase can be clearly seen to be spalling off of the grain.

Date : 2009-08-21T01:50:21+01:00

License :

Publisher : Core-Materials

Creator :

Creator :

Subject : magnesium

Subject : DoITPoMS

Subject : University of Cambridge

Subject : micrograph

Subject : corematerials

Subject : ukoer