期刊
ADVANCED ENGINEERING MATERIALS
卷 20, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.201700396
关键词
acoustic emission; alloying elements; LPSO phase; magnesium alloys; mechanical properties
资金
- Czech Science Foundation [16-12075S]
- Grant Agency of the Charles University [1262217]
- Operational Program Research, Development, and Education, The Ministry of Education, Youth, and Sports (OP RDE, MEYS) [CZ.02.1.01/0.0/0.0/16_013/0001794]
- Spanish Ministry of Economy and Competitiveness [MAT2012-34135]
The Mg-Y-Zn alloys with different contents of alloying elements are extruded at an extrusion ratio of 4:1 at 350 degrees C. The microstructure of the alloys is of an inhomogeneous character showing fine grains produced due to dynamic recrystallization and coarse original grains elongated along the extrusion direction (ED). Moreover, Y and Zn form a long-period stacking-ordered (LPSO) phase whose volume fraction increases with their increasing content in the alloy. All investigated alloys exhibit distinct fiber textures with basal planes oriented parallel to ED. It is seen that increasing content of alloying elements leads to a weaker texture. Compression tests with concurrent acoustic emission (AE) measurements are performed along ED at room temperature and a constant strain rate in order to reveal active deformation mechanisms in the alloys and to relate them to their mechanical properties. The AE response is also discussed with respect to the volume fraction of the LPSO phase.
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