Journal
JOURNAL OF MATERIALS SCIENCE
Volume 45, Issue 17, Pages 4827-4836Publisher
SPRINGER
DOI: 10.1007/s10853-010-4589-y
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Funding
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0855009] Funding Source: National Science Foundation
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Equal-channel angular pressing (ECAP) is an effective tool for refining the grain structure of magnesium alloys and improving the ductility at moderate temperatures. However, grain refinement in these alloys differs from other metals because new grains are formed along the boundaries of the initial structure and these newly formed grains slowly spread to consume the interiors of the larger grains in subsequent passes. A model is presented for grain refinement in magnesium alloys processed by ECAP based on the principles of dynamic recrystallization where new fine grains are formed along the initial boundaries and along twin boundaries. This model provides an explanation for a wide range of experimental data and introduces the concept of grain size engineering for achieving selected material properties in magnesium alloys.
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