Interface characteristics of Mg/Al bimetal produced by a novel liquid-liquid compound casting process with an Al interlayer
- 45 Downloads
Mg/Al bimetal was successfully prepared using a novel lost-foam casting (LFC) liquid-liquid compound process with an Al interlayer, and the interface characteristics including microstructure, mechanical properties, and fracture behavior of the Mg/Al bimetal were investigated in this paper. The results show that the mixing of AZ91D and A356 liquid metals was fully avoided by using the Al interlayer. A metallurgical bonding between the AZ91D alloy matrix and the A356 alloy matrix was achieved, obtaining a compact interface. The interface was constituted by the Al12Mg17 + δ (Mg) eutectic and the Al3Mg2 and Mg2Si reaction layers, which were respectively next to the AZ91D alloy matrix and the A356 alloy matrix. The reaction layers had much higher microhardnesses compared with the microhardnesses of the matrixes, and the highest microhardness up to 275–299 HV was obtained in the reaction layer next to the Al matrix. A brittle fracture morphology was observed in the fractured surface of the Mg/Al bimetal, and the fracture mainly initiated with the fracture of the reaction layer close to the Al matrix.
KeywordsMg/Al bimetal Compound casting Interlayer Interface Microstructure Mechanical properties
Unable to display preview. Download preview PDF.
This study is supported by the National Natural Science Foundation of China (Nos. 51775204 and 51204124), the fund of the State Key Laboratory of Solidification Processing in NWPU (No. SKLSP201821), the Natural Science Foundation of Hubei Province, China (No. 2017CFB488), and the Analytical and Testing Center, HUST.
- 1.Jiang WM, Chen X, Wang BJ, Fan ZT, Wu HB (2016) Effects of vibration frequency on microstructure, mechanical properties, and fracture behavior of A356 aluminum alloy obtained by expendable pattern shell casting. Int J Adv Manuf Technol 83(1–4):167–175. https://doi.org/10.1007/s00170-015-7586-0 CrossRefGoogle Scholar
- 3.Li GY, Jiang WM, Fan ZT, Jiang ZL, Liu XW, Liu FC (2017) Effects of pouring temperature on microstructure, mechanical properties, and fracture behavior of Al/Mg bimetallic composites produced by lost foam casting process. Int J Adv Manuf Technol 91(1–4):1355–1368. https://doi.org/10.1007/s00170-016-9810-y CrossRefGoogle Scholar
- 5.Campbell J (2011) Complete casting handbook, first edn. Elsevier Press, UKGoogle Scholar
- 9.Jiang WM, Fan ZT, Li GY, Yang L, Liu XW (2016) Effects of melt-to-solid insert volume ratio on the microstructures and mechanical properties of Al/Mg bimetallic castings produced by lost foam casting. Metall Mater Trans A 47(12):6487–6497. https://doi.org/10.1007/s11661-016-3788-9 CrossRefGoogle Scholar
- 13.Mofid MA, Abdollah-Zadeh A, Gür CH (2014) Investigating the formation of intermetallic compounds during friction stir welding of magnesium alloy to aluminum alloy in air and under liquid nitrogen. Int J Adv Manuf Technol 71(5–8):1493–1499. https://doi.org/10.1007/s00170-013-5565-x CrossRefGoogle Scholar
- 24.Jiang WM, Fan ZT, Liu DJ, Liao DF, Zhao Z, Dong XP, Wu HB (2012) Influence of process parameters on filling ability of A356 aluminium alloy in expendable pattern shell casting with vacuum and low pressure. Int J Cast Metal Res 25(1):47–52. https://doi.org/10.1179/1743133611Y.0000000014 CrossRefGoogle Scholar
- 26.Jiang WM, Fan ZT, Liu DJ, Wu HB (2013) Influence of gas flowrate on filling ability and internal quality of A356 aluminum alloy castings fabricated using the expendable pattern shell casting with vacuum and low pressure. Int J Adv Manuf Technol 67(9–12):2459–2468. https://doi.org/10.1007/s00170-012-4663-5 CrossRefGoogle Scholar
- 40.Liu ZL, Ji SD, Meng XC, Huang RF (2017) Improving joint formation and tensile properties of friction stir welded ultra-thin Al/Mg alloy sheets using a pinless tool assisted by a stationary shoulder. Int J Adv Manuf Technol 93(5–8):2071–2079. https://doi.org/10.1007/s00170-017-0682-6 CrossRefGoogle Scholar