Formability of 6063 aluminum alloy tube at high temperature using multi-bulge test by hot metal gas forming process

Transcription

1 Downloaded from mmemodaresacir at 4:55 IRST on Saturday February rd 09 mmemodaresacir 0 * jhosseini@nitacir : : 94 : 00 C C C 58% * Formability of 0 aluminum alloy tube at high temperature using multibulge test by hot metal gas forming process Mohsen Hajinejad Sorkhi, Seyed Jamal Hosseinipour*, Hamed Jamshidi Aval Department of Mechanical Engineering, Noshirvani University of Technology, Babol, Iran * POB 484 Babol, Iran, jhosseini@nitacir ARTICLE INFORMATION ABSTRACT Original Research Paper Received 4 December 05 Accepted 4 January 0 Available Online 0 March 0 Due to the low formability of aluminum alloys at ambient temperature, forming of these alloys is performed at high temperature Research has shown that the results of simple tensile test to predict the materials behavior at high temperatures are not sufficiently accurate to predict the formability of aluminum tubes at high temperature The mechanical properties of the tube are very important at high temperatures In this study the formability of 0 aluminum alloy tubes are investigated by free bulging test at temperature range 40 C to Then the mechanical properties including flow stress, strain rate sensitivity coefficient and strength constant are obtained using tube multibulge test at temperature range 50 C to For this purpose, hot metal tube gas forming process is used and the effect of process parameters such as the effect of temperature, pressure and time on the expansion ratio and height of the bulge are studied The results show that the maximum expansion ratio is 58% at Bursting pressure decreases from 9MPa to 0MPa with temperature increasing from 40 C to The bulge height increases with increasing forming time at constant pressure Also, with increasing temperature in the temperature range 50 C to the flow stress and strength constant decrease and strain rate sensitivity coefficient increases Keywords: Hot metal gas forming Tube freebulge test Tube multibulge test Aluminum alloy 0 [] Please cite this article using: [] : M Hajinejad Sorkhi, S J Hosseinipour, H Jamshidi Aval, Formability of 0 aluminum alloy tube at high temperature using multibulge test by hot metal gas forming process, Modares Mechanical Engineering, Vol, No, pp 859, 0 in Persian

2 0 [5] Downloaded from mmemodaresacir at 4:55 IRST on Saturday February rd 09 AZB 00 C 50 C [] [5,4] 7% 00 C % 00 C 0% [] 0 [] 480 C [7] 0 [7] [8] AZB [9] 000 [8] [0] 0 00 C 0 [] 0 : [] 00 C 5% 0 SPZ [] [4] Fig Schematic of the ring dies geometry 95 8

3 0 40 C 5 5 Downloaded from mmemodaresacir at 4:55 IRST on Saturday February rd ± 9 00 Maximum Bulging Ratio Fig Hot metal gas forming set up [] C k Table chemical composition of tube Fig 4 Pressure path in free bulge test 4 Fig 5 The cross section of the specimen after free bulging test Fig Schematic of free bulging test

4 0 [4] Downloaded from mmemodaresacir at 4:55 IRST on Saturday February rd C ,4 5 Table Experimental conditions in tube multibulge test 5, ln ln C bar s ln 0 4 Fig Pressure path in tube multibulge test Fig 8 Schematic of the tube geometry after deformed [4] [4] 95 8 Fig 7 The cross section of the specimen after multibulge test 7 88

5 0 m Downloaded from mmemodaresacir at 4:55 IRST on Saturday February rd 09 ln ln ln d ln d ln ln ln ln 4 4 Fig 9 The effect of temperature on crack pressure C % 5% Fig 0 The effect of temperature on the expansion ratio 40 C 0 40 C 4 [] 50 C Fig Free bulge tube at different temperatures 89 95

6 Downloaded from mmemodaresacir at 4:55 IRST on Saturday February rd 09 0 Fig The greatest amount of crack line at 40 C 40 C Fig The least amount of crack line at Fig 4 The amount of crack line at 4 Fig 5 the specimens of tube multibulge test at various temperatures 5 Fig Flow stress in the temperature range 50 C to 50 C [8] C C

7 Downloaded from mmemodaresacir at 4:55 IRST on Saturday February rd 09 0 Fig 7 The effect of temperature on the strain rate sensitivity coefficient C MPa 8 MPa Fig 9 The effect of pressure time on the bulge height at : 50 Fig 0 The effect of time pressure on the bulge height 0 9 Fig 8 The effect of temperature on the strength constant 8 95

8 0 Downloaded from mmemodaresacir at 4:55 IRST on Saturday February rd 09 7 [] H Ch, Research and advances in fundamentals and industrial applications of hydroforming, Materials Processing Technology, Vol 7, No, pp 8 9, 005 [] B Dykstra, Hot Metal Gas Forming The Next Generation Process for Manufacturing Vehicle Structural Components, SAE International Body Engineering Conference, Detroit, Michigan, USA, 00 [] S Novtnyt, M Geiger, Process design for hydroforming of light metal sheets at elevated temperatures, Materials Processing Technology, Vol 8, No, pp , 00 [4] M Koc, T Altan, Prediction of forming limits and parameters in the tube hydroforming process, Machine Tools Manufacture, Vol 4, No, pp 8, 00 [5] L Yanli, H Zhubin, Y Shijian, W Jia, Formability determination of AZB tube for IHPF process at elevated temperature, Transactions of Nonferrous Metals Society of China, Vol, No 4, pp 8585, 0 [] H Zhubin, F Xiaobo, S Fei, Z Kailun, W Zhibiao, Y Shijian, Formability and microstructure of AA0 Al alloy tube for hot metal gas forming at elevated temperature, Transactions of Nonferrous Metals Society of China, Vol, No, pp 4 9, 0 [7] Y Shijian, Q Jun, H Zhubin, An experimental investigation into the formability of hydroforming 5A0 Altubes at elevated temperature, Materials Processing Technology, Vol 77, No, pp 808, 00 [8] Z He, S Yuan, G Liu, J Wu, W Cha, Formability testing of AZB magnesium alloy tube at elevated temperature, Materials Processing Technology, Vol 0, No 7, pp , 00 [9] T Zribi, A Khalfallah, H BelHadjSalah, Experimental characterization and inverse constitutive parameters identification of tubular materials for tube hydroforming process Materials Materials Design, Vol 49, No, pp 8877, 0 [0]S J Hashemi, H M Naeini, G L, Prediction of Bursting in Warm Tube Hydroforming using Modified Ductile Fracture Criteria, Modares Mechanical Engineering, Vol 4, No, pp 0, 04 in Persian []S Hashemi, H Naeini, G Liaghat, R Tafti, F Rahmani, Forming limit diagram of aluminum AA0 tubes at high temperatures by bulge tests, Mechanical Science and Technology, Vol 8, No, pp , 04 [] M Yoshizawa, H Ohsawa, Evaluation of strainrate sensitivity in superplastic compressive deformation, Materials Processing Technology, Vol 8, No, pp 04, 997 []M S Zoei, M Farzin, A H Mohammadi, Finite element analysis and experimental investigation on gas forming of hot aluminum alloy sheet, Modares Mechanical Engineering, Vol, No, pp 495, 0 in Persian [4]A ElMorsy, N Akkus, K Manabe, H Nishimura, Evaluation of superplastic characteristics of tubular materials by multitube bulge test, Materials Letters, Vol 0, No 4, pp 55954, 00 [5]JH Cheng, The determination of material parameters from superplastic inflation tests, Materials Processing Technology, Vol 58, No, pp 4, 99 []Zb He, Bg Teng, Cy Che, Zb Wang, Kl Zheng, Sj Yuan, Mechanical properties and formability of TA extruded tube for hot metal gas forming at elevated temperature, Transactions of Nonferrous Metals Society of China, Vol, No, pp , 0 [7]T Maeno, Ki Mori, K Fujimoto, Hot gas bulging of sealed aluminium alloy tube using resistance heating, Materials Manufacturing Rev, Vol, No 5, pp 7, 04 [8] A Assempour, M Ganjiani, Implementation of a robust algorithm for prediction of Forming limit diagrams, Materials Enginering and Performance, Vol 7, No, pp, 008 [9] S J Hosseinipour, An investigation into hot deformation and dynamic recrystallization of aluminum alloy 508, School of Engineering, Vol 0, No, pp 5, 008 in Persian 95 Fig The effect of pressure on the bulge height at 40 C 9 40 C 0 50 C %58 %5 4 8 MPa MPa 580 C C 50 C 7 9