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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Plate Hardening Behavior on the Deformation of Stainless Steel Metal Bellows
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Effect of Plate Hardening Behavior on the Deformation of Stainless Steel Metal Bellows

机译：板硬化行为对不锈钢金属波纹管变形的影响

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摘要

Tensile tests of original plate samples from three types of stainless steel metal bellows were performed at room temperature. The constitutive equations for the three hardening curves were obtained and fitted. The analysis results of the microstructure and fracture morphology of the tensile specimens show that the grain size of the plate with a high logarithmic-exponential hardening rate is uneven and the dimple of the shear fracture is elongated into an ellipse. By contrast, the grain size of the plate with a relatively low linear hardening rate is even and the dimple of the fracture is uniformly equiaxial. Finite element simulations of the hydraulic bulging and repeated limit bending deformation of the metal bellows of the three types of materials were also conducted. The repeated limit bending deformation process was tested experimentally. Although the effect of the hardening exponent on the residual stress of the metal bellows after hydraulic bulging is minimal, this exponent considerably influences the repeated limit bending deformation of the metal bellows after subsequent use. The trough hardening phenomenon is serious in the repeated limit bending process. Moreover, when the hardening exponent of the original plate is high, the resistance to bending fracture at the trough area is poor.
机译：在室温下进行三种类型的不锈钢金属波纹管原始板样品的拉伸试验。获得并安装了三条硬化曲线的本构剖面方程。拉伸试样的微观结构和断裂形貌的分析结果表明，具有高对指数硬化率的板的晶粒尺寸是不均匀的，并且剪切断裂的凹陷伸长到椭圆形中。相比之下，具有相对低的线性化硬化速率的板的晶粒尺寸均匀，并且裂缝的凹陷均匀均匀。还进行了三种材料的金属波纹管的液压凸出和重复极限弯曲变形的有限元模拟。通过实验测试重复的极限弯曲变形方法。尽管硬化指数对液压凸出后金属波纹管的残余应力的影响是最小的，但是该指数显着影响了随后使用后金属波纹管的重复极限弯曲变形。在重复的极限弯曲过程中，槽硬化现象是严重的。此外，当原始板的硬化指数高时，槽面积的抗弯曲骨折差。

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