Warm hydroforming of magnesium alloy tube with large expansion ratio

Process of warm tube hydroforming was experimentally investigated for forming an AZ31B magnesium alloy tubular part with a large expansion ratio. Effects of temperature on the mechanical properties and formability were studied by uniaxial tensile test and hydraulic bulge test. Total elongation incre...

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Published in:Transactions of Nonferrous Metals Society of China 2010-11, Vol.20 (11), p.2071-2075
Main Author: 刘钢 汤泽军 何祝斌 苑世剑
Format: Article
Language:English
Subjects:
AZ31B镁合金
Elongation
expansion ratio
hydraulic bulge test
Hydraulics
Hydroforming
magnesium alloy
Magnesium base alloys
Preforms
Strain hardening
Tensile tests
Thermal expansion
tube
Tubes
warm hydroforming
wrinkle
内高压
力学性能
单轴拉伸试验
均匀延伸率
成形工艺
膨胀比
镁合金管
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description Process of warm tube hydroforming was experimentally investigated for forming an AZ31B magnesium alloy tubular part with a large expansion ratio. Effects of temperature on the mechanical properties and formability were studied by uniaxial tensile test and hydraulic bulge test. Total elongation increases with temperature up to 250℃, but uniform elongation and maximum expansion ratio get the highest value at 175℃. Different axial feeding amounts were applied in experiments to determine the reasonable loading path. A preform with useful wrinkles was then realized and the tubular part with an expansion ratio of 50% was formed. Finally, mechanical condition to produce useful wrinkles is deduced and the result illustrates that useful wrinkles are easier to be obtained for tube with higher strain hardening coefficient value and tubular part with smaller expansion ratio.
doi_str_mv 10.1016/S1003-6326(09)60419-2
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source ScienceDirect Freedom Collection
subjects AZ31B镁合金
Elongation
expansion ratio
hydraulic bulge test
Hydraulics
Hydroforming
magnesium alloy
Magnesium base alloys
Preforms
Strain hardening
Tensile tests
Thermal expansion
tube
Tubes
warm hydroforming
wrinkle
内高压
力学性能
单轴拉伸试验
均匀延伸率
成形工艺
膨胀比
镁合金管
title Warm hydroforming of magnesium alloy tube with large expansion ratio
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