In Situ Investigation of Deformation Mechanisms in Magnesium-Based Metal Matrix Composites

다국어 초록 (Multilingual Abstract)

We studied the effect of short fibers on the mechanical properties of a magnesium alloy. In particular, deformation mechanisms in a Mg-Al-Sr alloy reinforced with short alumina fibers were studied in situ using neutron diffraction and acoustic emission methods. The fibers’ plane orientation with respect to the loading axis was found to be a key parameter, which influences the acting deformation processes, such as twinning or dislocation slip. Furthermore, the twinning activity was much more significant in samples with parallel fiber plane orientation, which was confirmed by both acoustic emission and electron backscattering diffraction results. Neutron diffraction was also used to assist in analyzing the acoustic emission and electron backscattering diffraction results. The simultaneous application of the two in situ methods, neutron diffraction and acoustic emission, was found to be beneficial for obtaining complementary datasets about the twinning and dislocation slip in the magnesium alloys and composites used in this study.

참고문헌 (Reference)

1 J. Čapek, 602 : 25-, 2014

2 Z. Trojanová, The Mineral, Metals and Materials Society 435-, 2014

3 C. H. Cáceres, 88 (88): 977-, 2008

4 F. F. Lavrentev, 32 : 113-, 1978

5 M. A. Gharghouri, 79 : 1671-, 1999

6 Z. Trojanová, 324 : 122-, 2002

7 R. J. Arsenault, 81 : 175-, 1986

8 R. M. Aikin, 25 : 9-, 1991

9 Y. H. Yeh, 31 : 284-, 1990

10 L. P. Kubin, 48 : 119-, 2003

11 K. Máthis, 575 : 1-, 2013

12 S. R. Agnew, 49 : 4277-, 2001

13 O. Muránsky, 58 : 1503-, 2010

14 P. Dobroň, 100 : 888-, 2009

15 K. Máthis, 54 : 5361-, 2006

16 A. Vinogradov, 61 : 2044-, 2013

17 Z. Trojanová, 528 : 2479-, 2011

18 김정근, "분말야금법으로 제조한 A359/SiCp 복합재료의 미세조직 및 기계적 특성에 미치는 강화재의 분포와 크기의 영향" 대한금속·재료학회 51 (51): 857-863, 2013

19 N. Chawla, "Metal Matrix Composites" Springer Verlag 5-35, 2006

20 Giulio Timelli, "Effects of Grain Refinement on the Microstructure, Mechanical Properties and Reliability of AlSi7Cu3Mg Gravity Die Cast Cylinder Heads" 대한금속·재료학회 20 (20): 677-686, 2014

21 F. Delannay, "Comprehensive Composite Materials" Elsevier 341-, 2000

22 T. W. Clyne, "An Introduction to Metal Matrix Composites" Cambridge University Press 7-9, 1993