4VALIEV R Z, LANGDON T G. Principles of Equal-chan- nel Angular Pressing as a Processing Tool for Grain Re- finement [ J]. Progress in Materials Science, 2006, 51 (7) :881--981.
5FIGUEIREDO R B, LANGDON T G. Strategies for Achie- ving High Strain Rate Superplasticity in Magnesium Alloys Processed by Equal-channel Angular Pressing[ J]. Scrip- ta Materialia,2009,61 ( 1 ) :84--87.
6DINGS X, LEE W T, CHANG C P. Improvement of Strength of Magnesium Alloy Processed by Equal Channel Angular Extrusion [ J ]. Scripta Materialia, 2008,59 ( 9 ) : 1006--1009.
