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Effect of Alloying Element Addition on the Microstructure, Tensile and Impact Toughness of the Modified Al-6.5Si Alloy
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개량 Al-6.5Si 합금의 미세조직, 인장 및 충격 인성에 미치는 합금 원소 첨가의 영향

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Type
Academic journal
Author
T.-H. Park (인하대학교) M.-S. Baek (인하대학교) S.-I. Yoon (삼기오토모티브) J.-P. Kim (자동차부품연구원) K.-A. Lee (Inha university)
Journal
The Korean Society for Technology of Plasticity and materials processing (KSTP) Transactions of Materials Processing Vol.29 No.3(Wn.187) KCI Accredited Journals
Published
2020.6
Pages
135 - 143 (9page)

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Effect of Alloying Element Addition on the Microstructure, Tensile and Impact Toughness of the Modified Al-6.5Si Alloy
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Low-cost alloying elements were added to a modified Al-6.5Si alloy and its microstructure, tensile and impact toughness properties were investigated. The alloying elements added were Mg, Zn, and Cu, and two kinds of alloy A (Mg:0.5, Zn:1, Cu:1.5 wt.%) and alloy B (Mg:2, Zn:1.5, Cu:2 wt.%) were prepared. In the as-cast Al-6.5Si alloys, Si phases were distributed at the dendrite interfaces, and Al₂Cu, Mg₂Si, Al<SUB>6</SUB>(Fe,Mn) and Al<SUB>5</SUB>(Fe,Mn)Si precipitates were also observed. The size and fraction of casting defects were measured to be higher for alloy A than for alloy B. The secondary dendrite arm spacing of alloy B was finer than that of alloy A. It was confirmed by the JMatPro S/W that the cooling rate of alloy B could be more rapid than alloy A. The alloy B had higher hardness and strength compared to the values of alloy A. However, the alloy A showed better impact toughness than alloy B. Based on the above results, the deformation mechanism of Al-6.5Si alloy and the improving method for mechanical properties were also discussed.
#Al-6.5Si Alloy #Alloy Development #Tensile #Impact Toughness #Microstructure #Deformation Mechanism

Contents

Abstract
1. 서론
2. 실험방법
3. 결과 및 고찰
4. 결론
REFERENCES

References (32)

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O. Engler, C. Schafer, O. R. Myhr, 2015, Effect of natural ageing and pre-straining on strength and anisotropy in aluminium alloy AA 6016, Mater. Sci. Eng. A, Vol. 639, pp. 65~74. google schola J. Hirsch, T. Al-Samman, 2013, Superior light metals by texture engineering: Optimized aluminum and magnesium alloys for automotive applications, Acta Mater., Vol. 61, No. 3, pp. 818~843. google schola P. Jimbert, I. Eguia, I. Perez, M. A. Gutierrez, 2011, Analysis and comparative study of factors affecting quality in the hemming of 6016T4AA performed by means of electromagnetic forming and process characterization, J. Mater. Process. Technol., Vol. 211, No. 5, pp. 916~924. google schola Y. K. Kim, M. J. Kim, Shae K. Kim, Y. O. Yoon, K. A. Lee, 2017, Microstructure, Tensile Strength, and High Cycle Fatigue Properties of Mg+Al2Ca added ADC12 (Al-Si-Cu) Alloy, Trans. Mater. Process., Vol. 26, No. 5, pp. 306~313. google schola Y. J. Li, S. Brusethaug, A. Olsen, 2006, Influence of Cu on the mechanical properties and precipitation behavior AlSi7Mg0.5 alloy during aging treatment, Scr. Mater., Vol. 54, No. 1, pp. 99~103. google schola

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