Mechanical Properties and Fracture Behavior of Indirect Squeeze-Cast A354 Alloy Using Local Pressurization

Abstract:

The effect of local pressurization on mechanical properties and fracture behavior of indirect squeeze-cast A354 alloy has been investigated. As compared to conventional process, the porosity and shrinkage cavity for heavy sectioned squeeze castings were improved by the indirect squeeze casting, while its tensile properties were inferior to other parts of the casting. That is mainly due to that inhomogeneous eutectic Si particles within strip, angular and fragment shapes distribute in bulky α-Al cells, which is caused by slower solidification rate. After T6 treatment, the fragmentation and spheroidization of the eutectic silicon happened. Under this situation, the effect of fragmentation on α-Al matrix reduced. Tensile properties of the casting (both local pressurization part and non-local pressurization part) were enhanced greatly, by 36.8% and 25.4%, respectively. Fracture analysis results show that the type of fracture morphology is changed from mixed mode of brittle cleavage and ductile to ductile mode after T6-treatment.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 502-510
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.502
• Online since: March 2016
• Authors: Hai Jun Liu, Lie Jun Li*, Jian Wei Niu, Ji Xiang Gao, Xue Wen Chen
• Keywords: Aluminium Alloy, Fracture Behavior, Indirect Squeeze Casting, Local Pressurization, Mechanical Properties

References

[1] M.R. Ghomashchi, A. Vikhrov, Squeeze Casting: an overview, Journal of Materials Processing Technology, 101(2000) 1-9.

DOI: 10.1016/s0924-0136(99)00291-5

[2] A. Maleki, B. Niroumand, A. Shafyei, Effects of squeeze casting parameters on density, macrostructure and hardness of LM13 alloy, Materials Science and Engineering A. 428(2006) 135-140.

DOI: 10.1016/j.msea.2006.04.099

[3] M.T. Abou El-khair, Microstructure characterization and tensile properties of squeeze-cast AlSiMg alloys, materials letters, 59(2005) 894-900.

DOI: 10.1016/j.matlet.2004.11.041

[4] W.F. Mo, L. Zhang, G.H. Wu, Y. Zhang, W.C. Liu, C.L. Wang, Effects of processing parameters on microstructure and mechanical properties of squeeze-cast Mg–12Zn–4Al–0. 5Ca alloy, Materials and Design. 63(2014) 729-737.

DOI: 10.1016/j.matdes.2014.07.005

[5] D.J. Britnell, K. Neailey, Macrosegregation in thin walled castings produced via the direct squeeze casting process, Journal of Materials Processing Technology. 138(2003) 306-310.

DOI: 10.1016/s0924-0136(03)00090-6

[6] S.Z. Wang, Z.S. Ji, S. Sugiyama, M.L. Hu, Segregation behavior of ADC12 alloy differential support formed by near-liquidus squeeze casting, Materials and Design, 65(2015) 591-599.

DOI: 10.1016/j.matdes.2014.09.065

[7] Y.F. Bai, H.D. Zhao, Tensile properties and fracture behavior of partial squeeze added slow shot die-cast A356 aluminum alloy, Materials and Design. 31(2010) 4237-4243.

DOI: 10.1016/j.matdes.2010.04.005

[8] I. Ohnaka, J.D. Zhu, A. Sugiyama, F. Kinoshita, A Method to set process parameters of local squeeze in HPDC, Materials Science and Engineering. 33(2012) 1-8.

DOI: 10.1088/1757-899x/33/1/012001

[9] E.S. Kim, K.H. Lee, Y.H. Moon, A feasibility study of the partial squeeze and vacuum die casting process, Journal of Materials Processing Technology, 105(2000) 42-48.

DOI: 10.1016/s0924-0136(00)00557-4

[10] Y.Y. Li, Y. Hu, H.D. Zhao, W.W. Zhang, Vertical Indirect Squeeze Casting Process of an Al-Cu-Mn Alloy Frame Part, materials science form. 628(2009) 605-610.

DOI: 10.4028/www.scientific.net/msf.628-629.605

[11] Z.L. Wang, T. Zhang, Y.B. Zhou, Y.C. Yu, Research on high pressure solidification microstructure and the microhardness of Al-Mg-Zn alloy, Advanced Materials Research. 554(2012) 565-569.

DOI: 10.4028/www.scientific.net/amr.554-556.565

[12] M. Okayasu, K. Ota, S. Takeuchi, H. Ohfuji, T. Shiraishi, Influence of microstructural characteristics on mechanical properties of ADC12 aluminum alloy, Materials Science & Engineering A. 592(2014) 189-200.

DOI: 10.1016/j.msea.2013.10.098

[13] M. Okayasua, Y. Ohkura, S. Takeuchi, S. Takasu, H. Ohguji, T. Shiraishi, A study of the mechanical properties of an Al–Si–Cu alloy (ADC12) produced by various casting processes, Materials Science and Engineering A. 543(2012) 185-192.

DOI: 10.1016/j.msea.2012.02.073

[14] A.R. Farkoosh, M. Pekguleryuz, Enhanced mechanical properties of an Al–Si–Cu–Mg alloy at 300℃: Effects of Mg and the Q-precipitate phase. Materials Science & Engineering A. 621(2015) 277-286.

DOI: 10.1016/j.msea.2014.10.080

[15] M. Tiryakioglu, Si particle size and aspect ratio distributions in an Al–7%Si–0. 6%Mg alloy during solution treatment, Materials Science and Engineering A, 473(2008) 1-6.

DOI: 10.1016/j.msea.2007.03.044

[16] F.H. Samuel, M. Tash, F. Mucciardi, H.W. Doty, Effect of metallurgical parameters on the hardness and microstructural characterization of as-cast and heat-treated 356 and 319 aluminum alloys, Materials science and Engineering A. 443(2007).

DOI: 10.1016/j.msea.2006.08.054

[17] R.X. Li, R.D. Li, Y.H. Zhao, C.X. Li, X.F. Sun, H.R. Guan, Z.Q. Hu, Effect of heat treatment on eutectic silicon morphology and mechanical property of Al-Si-Cu-Mg cast alloys, Trans. Nonferrous Met. Soc. China. 14(2004) 496-500.

[18] S. Lu, S. S, Wu, W. Li, P. An, Microstructure and Tensile Properties of Wrought Al Alloy 5052 Produced by Rheo-Squeeze Casting. METALLURGICAL AND MATERIALS TRANSACTIONS A. 44(2013) 2735-2745.

DOI: 10.1007/s11661-013-1637-7

[19] M.T. Abou El-khair, Microstructure characterization and tensile properties of squeeze-cast AlSiMg alloys, Materials Letters. 59(2005)894-900.

DOI: 10.1016/j.matlet.2004.11.041

[20] J.H. Peng, X.L. Tang, J.T. He, D.Y. Xu, Effect of heat treatment on microstructure and tensile properties of A356 alloys, Trans. Nonferrous Met. Soc. China. 21(2011) 1950-(1956).

DOI: 10.1016/s1003-6326(11)60955-2

[21] K. Lee, Y.N. Kwon, S. Lee, Effects of eutectic silicon particles on tensile properties and fracture toughness of A356 aluminum alloys fabricated by low-pressure-casting, casting-forging, and squeeze-casting processes, Journal of Alloys and Compounds. 461(2008).

DOI: 10.1016/j.jallcom.2007.07.038