TY - GEN
T1 - An investigation on the formability of aerospace aluminum alloys AA2024 and AA7075 under warm hydroforming conditions
AU - Parekh, Gopal
AU - Hall, Steven
AU - Koç, Muammee
PY - 2010
Y1 - 2010
N2 - To understand the forming limits of aerospace grade lightweight materials under warm forming conditions, two aluminum alloys (AI2024 and 7075) were tested under warm biaxial loading conditions. In the first phase of this study, sheet blanks of 150 × 150 mm were hydraulically bulged bi-axially without a counter die or restriction at two different strain rates, 0.0013 and 0.013s -1, and four different temperature levels, 25, 100, 200, and 300°C. Based on these tests, flow curves were obtained for different test conditions to reveal the effect and significance of temperature and strain rate on he forming of aluminum sheets. In the secord phase, the same size sheet blanks of two alloys were hydroformed into a closed, axisymmetric die under hydraulic pressures of 10 and 15 MPa, and at temperature levels of 25 and 200°C. Three parameters namely, cavity filling ratio (CFR), thickness, and hardness were measured and analyzed to understand he effect of pressure rate and temperature on forming limits.
AB - To understand the forming limits of aerospace grade lightweight materials under warm forming conditions, two aluminum alloys (AI2024 and 7075) were tested under warm biaxial loading conditions. In the first phase of this study, sheet blanks of 150 × 150 mm were hydraulically bulged bi-axially without a counter die or restriction at two different strain rates, 0.0013 and 0.013s -1, and four different temperature levels, 25, 100, 200, and 300°C. Based on these tests, flow curves were obtained for different test conditions to reveal the effect and significance of temperature and strain rate on he forming of aluminum sheets. In the secord phase, the same size sheet blanks of two alloys were hydroformed into a closed, axisymmetric die under hydraulic pressures of 10 and 15 MPa, and at temperature levels of 25 and 200°C. Three parameters namely, cavity filling ratio (CFR), thickness, and hardness were measured and analyzed to understand he effect of pressure rate and temperature on forming limits.
KW - AA2024
KW - AA7075
KW - Aluminum sheet
KW - Formabillity
KW - Lightweight material
KW - Warm bulge: Test
UR - http://www.scopus.com/inward/record.url?scp=78149363788&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:78149363788
SN - 0872638685
SN - 9780872638686
T3 - Transactions of the North American Manufacturing Research Institution of SME
SP - 491
EP - 498
BT - Transactions of the North American Manufacturing Research Institution of SME 2010, NAMRI/SME
T2 - 38th Annual North American Manufacturing Research Conference, NAMRC 38
Y2 - 25 May 2010 through 28 May 2010
ER -