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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......
. Key words: Hastelloy C-276 alloy; stress relaxation test; creep constitutive equation; vacuum hot bulge forming Hastelloy C-276合金是一种镍基高温合金,具有优良的耐腐蚀性能和高温力学性能,在化工,航空和核电等领域得到了广泛应用[1-2].在核电领域,Hastelloy...很好,验证蠕变本构方程的可靠性. 关键词:Hastelloy C-276合金;应力松弛试验;蠕变本构方程;真空热胀形 中图分类号:TG146.1+5 文献标志码:A Stress relaxation test of Hastelloy C-276 alloy and its creep......
J. Cent. South Univ. Technol. (2010) 17: 1351-1356 DOI: 10.1007/s11771-010-0641-y Engineering behaviors of reinforced gabion retaining wall based on laboratory test LIN Yu-liang(林宇亮), YANG Guo... Heidelberg 2010 Abstract: In order to study the engineering behaviors of reinforced gabion retaining wall, laboratory model test was carried out. Cyclic load and unload of five levels (0-50, 0-100......
; differential speed rolling; cross rolling; basal texture; stamping; bulge forming property 变形镁合金是目前使用最轻的金属结构材料之一,不仅具有较高的比强度和比刚度,而且具有优良的电磁屏蔽性,散热性,减震性和机械加工性能.在3C电子信息产品,汽车,家电以及航天航空等领域得到广泛应用.由于其突出的性能优势和易回... (mass fraction, %) 图2 埃里克森试验示意图 Fig. 2 Schematic diagram of Erichsen test (mm) 图3 锥杯实验示意图 Fig.3 Schematic diagram of cone-cup test (mm) 2 结果与讨论分析 2.1 不同轧制工艺获得镁合金薄板微......
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J. Cent. South Univ. (2018) 25: 3085-3097 DOI: https://doi.org/10.1007/s11771-018-3976-4 Physical simulation test of soil-rock mixture from synthetic transparent soil DING Xiao-hua(丁小华)1, 2, ZHOU... is mixed with liquid paraffin and n-tridecane at a mass ratio of 4.4 at room temperature of 17℃. Physical and mechanical properties of transparent soil are determined by physical test and compared......
; Abstract: The mechanical properties of AZ31B magnesium alloy tube were tested by ring hoop tension test at different temperatures. The formability for tube hydroforming was also evaluated by free-expansion test. The results show that there exists a quick decrease of total elongation along hoop direction at the temperature range of 150-230 ℃, which is quite different......
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Centrifugal model test and numerical simulation of vertical earth pressure on soft foundation box culvertZHANG Jun-hui(张军辉)1, 2, YAO Yong-sheng(姚永胜)1, ZHENG Jian-long(郑健龙)1, ZHANG Tao(张涛)3(1... the interaction of the soil-culvert-foundation system, both a centrifugal model test and a numerical simulation were conducted and the comparisons with the current methods to determine the load......