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Deformation mechanisms of a bimodal eutectic Mg72Cu5Zn23 ultrafine composite |
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| Authors: | Gi An Song,Do Hyang Kim,Jin Kyu Lee,Jü rgen Eckert,Ki Buem Kim |
| Affiliation: | a Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Gunja-dong, 98 Gwangjin-gu, Seoul, 143-747, Republic of Korea b Center for Non-crystalline Materials, Department of Metallurgical Engineering, Yonsei University, 134 Shinchondong Seodaemungu, Seoul, 120-749, Republic of Korea c Advanced Materials Division, Korea Institute of Industrial Technology (KITECH), Dongchon-dong, Yeonsu-gu, 463-130 Incheon, Republic of Korea d Division of Advanced Materials Engineering, Kongju National University, 275, Budae-dong, Seobuk-gu, Cheonan-si, Chungnam, 331-717, Republic of Korea e IFW Dresden, Institute for Complex Materials, P.O. Box 27 01 16, D-01171 Dresden, Germany |
| Abstract: | Deformation behavior of a Mg72Cu5Zn23 alloy containing bimodal eutectic structure has been systematically investigated based on microstructural changes upon different amounts of compressive strain. The microstructural evolution of the sample at the early stage of the deformation up to 3% strain reveals that a large number of twins form homogeneously in the α-Mg phase of the coarse eutectic structure. After further deformation to failure, propagation of cracks takes place along the interface between the fine and coarse eutectic structures forming a typical dimple-like morphology on the fracture surface, indicative of the effective dissipation of the stress. |
| Keywords: | Composite materials Mechanical properties Metals and alloys Microstructure |
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