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题名: Effect of Icosahedral Phase on Crystallographic Texture and Mechanical Anisotropy of Mg-4%Li Based Alloys
作者: Li, C. Q.;  Xu, D. K.;  Yu, S.;  Sheng, L. Y.;  Han, E. H.
发表日期: 2017-5-1
摘要: Through investigating and comparing the microstructure and mechanical properties of the as-extruded Mg alloys Mg-4%Li and Mg-4%Li-6%Zn-1.2%Y (in wt%), it demonstrates that although the formation of I-phase (Mg3Zn6Y, icosahedral structure) could weaken the crystallographic texture and improve the mechanical strength, the mechanical anisotropy in terms of strength remains in Mg-4%Li-6%Zn-1.2%Y alloy. Failure analysis indicates that for the Mg-4%Li alloy, the fracture surfaces of the tensile samples tested along transverse direction (TD) contain a large number of plastic dimples, whereas the fracture surface exhibits quasi-cleavage characteristic when tensile samples were tested along extrusion direction (ED). For the Mg-4%Li-6%Zn-1.2%Y alloy, typical ductile fracture surfaces can be observed in both "TD" and "ED" samples. Moreover, due to the zonal distribution of broken I-phase particles, the fracture surface of "TD" samples is characterized by the typical "woody fracture". Copyright (C) 2017, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited.
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
Li, C. Q.,Xu, D. K.,Yu, S.,et al. Effect Of Icosahedral Phase On Crystallographic Texture And Mechanical Anisotropy Of Mg-4%li Based Alloys[J]. Journal Of Materials Science & Technology,2017,33(5):475-480.

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