Microstructural Improvement of Eutectic Al + Mg2Si Phases on Al–Zn–Si–Mg Cast Alloy with TiB2 Particles Additions |
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| Authors: | Byungjoo Kim Jihoon Hwang Yongho Park Youngcheol Lee |
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| Institution: | 1.Energy Component & Material R&BD Group, Korea Institute of Industrial Technology, Busan 46938, Korea;2.Department of Materials Science and Engineering, Pusan National University, Busan 46241, Korea;3.Materials & Production Engineering Research Institute, LG Electronics, Pyeongtaek 17709, Korea; |
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| Abstract: | In this study, the effects of adding TiB2 particles to eutectic Al + Mg2Si phases in aluminum alloys were analyzed. The eutectic Al + Mg2Si phases were modified effectively when a large amount of TiB2 was added, and changes in the shape, size, and distribution of the eutectic Al + Mg2Si phases were confirmed using a polarizing microscope and FE-SEM. The crystal structure of the TiB2 particles and Mg2Si phases were analyzed using HR-TEM, and the analysis confirmed that the TiB2 particles can act as heterogeneous nucleation sites. This paper intends to clarify the principle of phase modification of the eutectic Al + Mg2Si phases by TiB2 particles and proposes a new mechanism to improve Mg2Si phase modification when TiB2 particles are added. |
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| Keywords: | aluminum alloy phase modification intermetallic compound eutectic Al + Mg2Si phases |
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