Analysis of the Deformation Behavior of Magnesium-Rare Earth Alloys Mg-2 pct Mn-1 pct Rare Earth and Mg-5 pct Y-4 pct Rare Earth by In Situ Energy-Dispersive X-ray Synchrotron Diffraction and Elasto-Plastic Self-Consistent Modeling

作者：Lentz Martin^*; Klaus Manuela; Coelho Rodrigo S; Schaefer Nobert; Schmack Florian; Reimers Walter; Clausen Bjorn

来源：Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 2014, 45A(12): 5721-5735.

DOI：10.1007/s11661-014-2533-5

The deformation behavior of the Mg-RE alloys ME21 and WE54 was investigated. Although both alloys contain rare earth elements, which alter and weaken the texture, the flow curves of the alloys deviate significantly, especially in uniaxial compression test. Apart from the higher strength of the WE54 alloy, the compression flow curve does not exhibit the typical sigmoidal shape, which is associated with tension twinning. However, optical microscopy, X-ray texture measurements, and EBSD analysis reveal the activity of tension twinning. The combination of in situ energy-dispersive X-ray synchrotron diffraction and EPSC modeling was used to analyze these differences. The investigation reveals that twin propagation is decelerated in the WE54 alloy, which requires a change of the twinning scheme from the %26apos;finite initial fraction%26apos; to the %26apos;continuity%26apos; assumption.

• 出版日期2014-11
• 单位Los Alamos