High temperature mechanical behaviour of Mg-6Zn-1Y alloy with 1 wt.% calcium addition:Reinforcing effect due to I-(Mg3Zn6Yi)and Mg6Zn3Ca2 phases

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

作者机构：Department of Physical MetallurgyNational Center for Metallurgical Research(CENIM-CSIC)Avenida Gregorio del Amo 828040 MadridSpain Institute of Materials ResearchHelmholtz-Zentrum GeesthachtMax-Planck-Str.121502 GeesthachtGermany Structural Research on New MaterialsHelmholtz-Zentrum Geesthacht Outstation at DESYNotkestrafie 8522607 HamburgGermany 

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

年 卷 期：2020年第8卷第4期

页      面：1047-1060页

核心收录：

学科分类：0806[工学-冶金工程] 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] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The authors would like to acknowledge financial support of the Spanish Ministry of Science and Innovation under project number MAT2016-78850-R We would like to acknowledge the expert support of A.Garcia,A.Tomas and M.Maier for assistance with SEM.The Deutches Elektronen-Synchrotron DESY is acknowledged for the provision of beamtime at the P07 beamline of the PETRA III synchrotron facility in the framework of proposal I-20170054EC 

主　　题：Magnesium alloys I-phase Synchrotron radiation diffraction High temperature mechanical properties. 

摘      要：The infiuence of small calcium additions on the high-temperature mechanical behaviour in an extruded Mg-6Zn-l Y(wt.%)alloy reinforced by the I-phase has been *** promotes the formation of the intermetallic Mg6Zn3Ca2 phase instead of 1-phase,which results in a noticeable improvement of the yield strength and ultimate tensile strength of the alloy above 100℃.The strength of the alloys was analysed taking into account the contribution due to the grain size,the crystallographic texture and the volume fraction and nature of second phase *** situ synchrotron radiation diffraction experiments have been used to evaluate the load partitioning between the magnesium matrix and the second phase particles(1-and MgeZgCa?phases)in both *** load transfer from the magnesium matrix towards the MgeZihCa?phase is markedly more effective than that for the I-phase over the entire temperature range,especially at 200°C,temperature at which the reinforcement effect of the I-phase is null.