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Effect of temperature on vacuum hot bulge forming of BT20 titanium alloy cylindrical workpiece WANG Ming-wei(王明伟)1, 2, ZHANG Li-wen(张立文)1, 2, PEI Ji-bin(裴继斌)1, 2, LI Chen-hui(李辰辉)3, ZHANG Fan... parameters for BT20 titanium alloy cylindrical workpiece manufactured by vacuum hot bulge forming. A two-dimensional nonlinear thermo-mechanical coupled FE model was established. Numerical simulation......
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FEM analysis of vacuum hot bulge forming of Hastelloy C-276 thin-walled cylindrical workpieceZHU Zhi(朱智), ZHANG Li-wen(张立文), GU Sen-dong(顾森东) (School of Materials Science and Engineering, Dalian.... The creep constitutive equation set has been integrated with the commercial FE (finite element) solver MSC.Marc via the user defined subroutine, CRPLAW, for the vacuum hot bulge forming process......
Trans. Nonferrous Met. Soc. China 24(2014) 3265-3273 Accuracy analysis of plane-strain bulge test for determining mechanical properties of thin films Lin YANG1,2, Shi-guo LONG1,2, Zeng-sheng MA1,2... on the deformation behavior of thin films in the plane-strain bulge test was systematically scrutinized by performing the finite element analysis, and then the accuracy of the plane-strain bulge test......
Trans. Nonferrous Met. Soc. China 22(2012) s275-s279 Characterization of plastic behaviour of sheet metals by hydraulic bulge test Lucian , Dan-Sorin , Ioan NICODIM, Ioan CIOBANU, Dorel BANABIC CERTETA Research Centre, Technical University of Cluj-Napoca, Cluj-Napoca, Romania Received 28 August 2012; accepted 25 October 2012 Abstract: In the hydraulic bulge tests, dies with both circular......
, 40136 Bologna, Italy Received 3 May 2019; accepted 4 December 2019 Abstract: The wedge and bulge expansion tests were compared in the assessment of the seam welds strength in a tubular profile extruded at two ram speeds. In the wedge test, the expansion was determined by moving a conical punch into the tube until the specimen fracture. In the bulge test, a hydrostatic tensile stress state......
Article ID: 1003-6326(2005)05-1009-05 Solution for slab forging with bulge between two parallel platens by strain rate vector inner-product integration and series expansion ZHAO De-wen(赵德文... was developed. First, effective strain rate for slab forging with bulge was expressed in terms of two-dimensional strain rate vector, and its inner-product was integrated term by term. Second, a summation......
C-276合金和1Cr18Ni9Ti不锈钢,Hastelloy C-276合金的热导率,比热容,热膨胀系数以及1Cr18Ni9Ti不锈钢的热膨胀系数均由实验测得,其他材料参数则是通过查阅合金手册和用差值算法相结合得到的. 图1 真空热胀形有限元模型 Fig. 1 FE model of vacuum hot bulge forming 2 材料的蠕变本构模型 真...保温温度后,两者的膨胀量不再发生变化. 图2 真空热胀形过程中转子屏蔽套和模具的径向位移变化 Fig. 2 Variation of radial displacement of rotor can and die during vacuum hot bulge forming process 在冷却阶段,随着温度的降低,转子屏蔽套和模具同时收缩,由于模具的膨胀系数大,转......
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... hydroforming; magnesium alloy; tube; expansion ratio; hydraulic bulge test; wrinkle 1 Introduction As the lightest metal material in common use, more and more magnesium alloy sheets and tubes have......
管材自由胀形时胀形区轮廓形状的影响因素林艳丽1,何祝斌1,苑世剑1(1.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院)摘 要:基于中间自由胀形区为椭圆形轮廓线的假设,对管材自由胀形过程进行了理论分析,研究了影响椭圆形状的主要因素及其对测试结果的影响.结果表明,影响椭圆形状的主要因素是管材胀形区长度和约束模具圆角半径.在其它条件一定时,椭圆的长短半轴比值随管材胀形区长度的减小或约束模具圆角半径的增大而减小,即管材胀形后的轮廓线形状从椭圆形逐渐变化为圆形然后又变为扁椭圆形.由胀形实验所得的应力-应变曲线随胀形区......