Hot deformation of Mg-Y-Zn alloy with a low content of the LPSO phase studied by in-situ synchrotron radiation diffraction  

作　　者：Klaudia Horváth Fekete Daria Drozdenko Jan Capek Kristián Máthis Domonkos Tolnai Andreas Stark Gerardo Garcés Patrik Dobron 

机构地区：[1]Department of Physics of Materials,Faculty of Mathematics and Physics,Charles University,Ke Karlovu 5,12116 Prague,Czech Republic [2]Nuclear Physics Institute of the CAS,25068ˇRež,Czech Republic [3]Magnesium Research Center,Kumamoto University,2-39-1 Kurokami Chuo-ku,860-8555 Kumamoto,Japan [4]Laboratory for Neutron Scattering and Imaging,Paul Scherrer Institute,Villigen PSI,5232,Switzerland [5]Institute of Materials Science,Helmholtz-Zentrum Geesthacht,Max-Planck Str.1,Geesthacht,D21502,Germany [6]Department of Physical Metallurgy,CENIM-CSIC,Avenida Gregorio del Amo 8,E-28040 Madrid,Spain

出　　处：《Journal of Magnesium and Alloys》2020年第1期199-209,共11页镁合金学报（英文）

基　　金：The authors acknowledge the Deutsches Elektronen-Synchrotron for the provision of facilities within the framework of the proposal I-20170459 EC;The authors are also grateful for support from the Grant Agency of the Charles University,grant number 1262217;the grant SVV-2019-260442;the Czech Science Foundation under grant 17-21855S;the Operational Programme Research,Development and Education,The Ministry of Education,Youth and Sports(OP RDE,MEYS),grant number CZ.02.1.01/0.0/0.0/16_013/0001794;GG thanks the support of the Spanish Ministry of Economy and Competitiveness,grant number MAT2016-78850-R.

摘　　要：The compressive deformation behavior of the extruded WZ42(Mg98.5Y1Zn0.5 in at.%)magnesium alloy containing a low amount of long-period stacking ordered(LPSO)phase was studied by in-situ synchrotron radiation diffraction technique.Tests were conducted at temperatures between room temperature and 350℃.Detailed microstructure investigation was provided by scanning electron microscopy,particularly the backscattered electron imaging and electron backscatter diffraction technique.The results show that twinning lost its dominance and kinking of the LPSO phase became more pronounced with increasing deformation temperature.No cracks of the LPSO phase and no debonding r at the interface between the LPSO phase and the Mg matrix were observed at temperatures above 200℃.At 350℃,the LPSO phase lost its strengthening effect and the deformation of the alloy was mainly realized by the dynamic recrystallization of the Mg matrix.

关 键 词：Magnesium alloy LPSO phase KINKING High temperature Synchrotron radiation diffraction 

分 类 号：TG146.22[一般工业技术—材料科学与工程]