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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >The effects of die geometry in tube channel pressing: Severe plastic deformation
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The effects of die geometry in tube channel pressing: Severe plastic deformation

机译：模具几何形状在管槽压制中的影响：严重的塑性变形

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摘要

The effects of die geometry on the deformation behavior of aluminum 6061 alloy tube in a novel severe plastic deformation (SPD) process called tube channel pressing (TCP) were studied using the Abaqus 6.10 software. Using the optimized die geometry, 1 to 3 passes of TCP is imposed not only to validate the simulation results, but also to investigate the performance of TCP as a SPD process. The finite element method (FEM) simulation results show that the moderated plastic strain, the lower inhomogeneity in distribution of plastic strain, and the lower risk of fracture during process can be obtained using the proper die geometry. In addition, the imposed strain is a mixture of shear strain and hoop strain accompanying with little bending strain which makes it relatively different from conventional SPD processes. Experiments shows that the experimentally obtained load-displacement curve of TCP is very close to its FEM predicted counterpart which validates the FEM simulation results. Additionally, after imposing of 3 passes of TCP to 6061 alloy, the grain size of the tube is decreased from a few tens of microns to less than 1 mu m while the yield strength is increased from 110MPa to 325MPa which show the capability of TCP as a SPD process for tubes.
机译：使用Abaqus 6.10软件研究了模具几何形状对新型的严重塑性变形（SPD）工艺（称为管通道压制（TCP））中铝6061合金管的变形行为的影响。使用优化的模具几何形状，必须施加1到3遍TCP，不仅可以验证仿真结果，还可以研究TCP作为SPD工艺的性能。有限元方法（FEM）仿真结果表明，使用适当的模具几何形状，可以获得适度的塑性应变，较低的塑性应变分布不均匀性和较低的断裂风险。另外，施加的应变是剪切应变和环向应变的混合物，伴随着很小的弯曲应变，这使其与传统的SPD工艺相对不同。实验表明，通过实验获得的TCP载荷-位移曲线非常接近其有限元预测的对应值，从而验证了有限元模拟结果。此外，在施加3次TCP到6061合金后，管的晶粒尺寸从几十微米减小到小于1微米，而屈服强度从110MPa增加到325MPa，这表明TCP的能力为管的SPD工艺。

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