Abstract A novel severe plastic deformation method entitled three dimensional severe plastic deformation was proposed for producing bulk ultrafine-grained materials with industry size. Experiment results of 20MnSiV steel indicate that the ferrite was refined to less than 3 μm after single pass 3D-SPD at 650 °C. The yield strength, ultimate tensile strength and elongation are 491.15 MPa, 626.29 MPa and 20.82%, respectively, which are increased by 28.39%, 3.56% and 10.39% as compared with the received sample. The increase in strength and elongation is related to the grain refinement of ferrite and the hindering effect of spheroidized cementite on dislocations.

中文翻译：

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一种制备块状超细晶材料的新方法：三维剧烈塑性变形

摘要 提出了一种新型的三维剧烈塑性变形方法，用于生产具有工业规模的块状超细晶粒材料。20MnSiV 钢的实验结果表明，在 650 °C 下进行单道 3D-SPD 后，铁素体细化到小于 3 μm。屈服强度、极限抗拉强度和伸长率分别为491.15 MPa、626.29 MPa和20.82%，比来样提高了28.39%、3.56%和10.39%。强度和伸长率的增加与铁素体的晶粒细化和球化渗碳体对位错的阻碍作用有关。