The effect of temperature on load partitioning evolution in magnesium metal matrix composite reinforced with Ti particles using in-situ synchrotron radiation diffraction experiments

作     者：G.Garces J.Medina P.Perez A.Stark N.Schell P.Adeva 

作者机构：Department of Physical MetallurgyCSICAvenida Gregorio del Amo 8Madrid E-28040Spain Institute of Materials PhysicsHelmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2023年第11卷第2期

页      面：706-719页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financial support of the Spanish Ministry of Economy and Competitiveness under project number MAT2016-78850-R provision of beamtime at the P07 beamline of the Petra Ⅲ synchrotron facility under the project I-20170054EC 

主　　题：Magnesium alloys In-situ synchrotron radiationdiffraction Plasticity Precipitation Dislocationslip Twinning 

摘      要：The load partitioning between the magnesium and titanium phases in an extruded Mg-15%Ti(vol.%) composite from room temperature up to 300 ℃ using synchrotron radiation diffraction during in-situ compression tests. During compression, the magnesium matrix composite deforms mainly by the activation of the extension twinning system up to 200 ℃. The volume fraction of twins increases with the plastic strain but decrease with the compression temperature. Hard titanium particles bear an additional load transferred by the soft magnesium matrix from room temperature up to 300 ℃. This effect is amplified after yield stress during plastic deformation. Additionally, twins within magnesium grains behaves as an additional reinforcement at low temperature(below 200 ℃) inducing an increase in the work hardening of the composite.