Fluid enhanced grain boundary migration (enhanced resolution)

The effect of fluids on recrystallization behaviour is well known; however, the detailed microscale distribution of fluid in grain boundaries and the influence of fluid on grain boundary migration are still unresolved. In this study, in-situ deformation experiments in transmitted light microscopy were undertaken, as this allows continuous and direct observation of the whole range of processes involved in fluid-assisted grain boundary migration.

In this movie, which is part of the PhD of Oliver Schenk, a fluid-filled grain boundary that incorporates fluids from inclusions is leaving behind a zone that is free of inclusions. The material is Bischofite and T is 70°C, strain rate 4x 10^-5s^-s.

For mor information, have a look at www.ged.rwth-aachen.de or Schenk and Urai (2005) The migration of fluid-filled grain boundaries in recrystallizing synthetic bischofite: first results of in-situ high-pressure, high-temperature deformation experiments in transmitted light. Journal of Metamorphic Geology
http://www3.interscience.wiley.com/journal/118651910/abstract

Category:

Science & Technology

Tags:

• structural geology