Effect of aluminum particle on properties of viscous medium during warm viscous pressure bulging

Abstract

Incorporating aluminum particles into viscous medium was proposed to improve the thermal conductivity of the viscous medium and the efficiency of warm viscous pressure forming (WVPF) process. The influence of aluminum particles on a viscous medium was investigated through settling, thermal conductivity, and compression experiments. Warm viscous pressure bulging (WVPB) experiments were conducted on polyetherimide (PEI) and AZ31B magnesium alloy sheets to determine the influence of the aluminum particles size and fraction on the forming efficiency and formed specimens based on the heating preparation times and profile curves, wall thicknesses and surface roughness values of the bulging specimens. The results show that the thermal conductivity of the viscous medium and the WVPF efficiency can be greatly improved via the addition aluminum particles with appropriate size and fraction under certain temperature condition, but have less influence on other properties of viscous medium.

Keywords

warm viscous pressure forming / aluminum particles / thermal conductivity / forming efficiency

References

[1] WangZ-j, LiuJ-g, LiYi. Fracture prediction in non-isothermal viscous pressure bulging of aluminum alloy sheet using ductile fracture criterion [J]. Journal of Central South University, 2010, 17(3): 449-453

[2] GaoT-j, LiuQ, ZhangW-zhuo. Research on the viscous warm pressure bulging process of AZ31B magnesium alloy with different ellipticity dies [J]. Transactions of Nonferrous Metals Society of China, 2017, 27(1): 157-162

[3] GaoT-j, LiuQ, LvY-jie. Investigation on feasibility and process of PEI sheet by viscous warm pressure forming [J]. International Journal of Advanced Manufacturing Technology, 2017, 91(6): 2143-2149

[4] GaoT-j, ZhangW-z, XuM-l, WangZ-jin. Finite element analysis and experiment on viscous warm pressure bulging of AZ31B magnesium alloy [J]. Journal of Wuhan University of Technology: Mater, 2017, 32(3): 640-644

[5] LiuJ-g, PengQ-c, LiuY, WangZ-jin. Viscous pressure bulging of aluminium alloy sheet at warm temperatures [J]. Journal of Mechanical Science and Technology, 2007, 21(10): 1505-1511

[6] WangJ-h, LongA C, CliffordM J. Experimental measurement and predictive modelling of bending behaviour for viscous unidirectional composite materials [J]. International Journal of Material Forming, 2010, 3(2): 1253-1266

[7] LiS-fang. Properties and application of thermal-conductive silicone rubber [J]. New Chemical Materials, 2002, 30(12): 11-13

[8] FangR-r W J-he. Advances in thermally conductive silicone rubber [J]. Silicone Material, 2008, 22(2): 100-104

[9] LamvikM, ZhouJ. Determination of thermal conductivity for particulate material [J]. Journal of Central South University, 1998, 5(2): 117-119

[10] MuQ-h, FengS-y, DiaoG-zhao. Thermal conductivity of silicone rubber filled with ZnO [J]. Polymer Composites, 2007, 28(2): 125-130

[11] GaoB Z, XuJ Z, PengJ J. Experimental and theoretical studies of effective thermal conductivity of composites made of silicone rubber and Al2O3 particles [J]. Thermochimica Acta, 2015, 614: 1-8

[12] WangL, LiF-p, SuZ-tao. Effective thermal conductivity behavior of filled vulcanized perfluoromethyl vinyl ether rubber [J]. Journal of Applied Polymer Science, 2008, 108(5): 2968-2974

[13] ZhouW-y, QiS-h, ZhaoH-zhen. Thermally conductive silicone rubber reinforced with boron nitride particle [J]. Polymer Composites, 2007, 28(1): 23-28

[14] ZhouW-y, QiS-h, TuC-chao. Thermal properties of heat conductive silicone rubber filled with hybrid fillers [J]. Journal of Composite Materials, 2008, 42(8): 173-187

[15] AntoniswamyA R, CarpenteraJ, CarterJ T. Forming-limit diagrams for magnesium AZ31B and ZEK100 alloy sheets at elevated temperatures [J]. Journal of Materials Engineering and Performance, 2013, 22(11): 3389-3397

[16] ShenM L, WangX J, YingT. Microstructure and tensile properties of AZ31B alloy and AZ31B-SiCp deformed through a multi-step process [J]. Journal of Materials Engineering and Performance, 2016, 25(10): 4608-4616

[17] MilesM P, FullwoodD, AdamsB L. Room temperature ductility and microstructure of magnesium AZ31B sheet [J]. Journal of Materials Engineering and Performance, 2011, 20(8): 1357-1363

[18] RodriguezA K, KriidliG, AyoubG. Effects of the strain rate and temperature on the microstructural evolution of twin-rolled cast wrought AZ31B alloys sheets [J]. Journal of Materials Engineering and Performance, 2013, 22(10): 3115-3125

[19] GhaffariT D, WorswickM J. Elevated temperature constitutive behavior and simulation of warm forming of AZ31B [J]. Journal of Materials Processing Technology, 2015, 221: 40-55

[20] BoehmanA L, DavidM A, SzybistJ. The impact of the bulk modulus of diesel fuels on fuel injection timing [J]. Energy & Fuels, 2004, 18(6): 1877-1882