Investigation on the microstructure and mechanical properties of large-tube forging manufactured by additive forging

IF 1.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Express Pub Date : 2024-07-16 DOI:10.1088/2053-1591/ad6402

Bing Wang, Hong-lin Zhang, Bin Xu, Ming-yue Sun, Dianzhong Li

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Abstract

Large-tube forgings were formed using nine layers of continuous-casting billet made from 15CrNi3MoV alloy steel via additive forging. The interfacial microstructural evolution under different hot-compression bonding temperatures and strains was investigated using optical microscopy, scanning electron microscopy, and electron backscatter diffraction. The tensile properties of the hot-compression-bonded and tube-forged samples were also evaluated. The results showed that as the hot-compression bonding temperature and strain increased, the bonding interface gradually disappeared and the voids at the bonding interface closed. Finally, the interface was replaced with recrystallised grains. The tensile properties of the hot-compression-bonded samples at different temperatures and strains were identical. The tensile properties of the interface and base samples of the tube forging were comparable, and the fracture morphologies were consistent. The fracture position of the large tensile sample with a length of 1000 mm containing three original interfaces is the base, indicating the complete metallurgical bonding of the forging

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增材锻造大管锻件的微观结构和机械性能研究

使用九层 15CrNi3MoV 合金钢连铸坯通过添加剂锻造形成了大管锻件。使用光学显微镜、扫描电子显微镜和电子反向散射衍射技术研究了不同热压结合温度和应变下的界面微观结构演变。此外，还评估了热压粘合和管锻样品的拉伸性能。结果表明，随着热压粘合温度和应变的增加，粘合界面逐渐消失，粘合界面上的空隙逐渐闭合。最后，界面被再结晶晶粒取代。热压粘合样品在不同温度和应变下的拉伸性能相同。管状锻件的界面样品和基体样品的拉伸性能相当，断口形态也一致。长度为 1000 毫米、包含三个原始界面的大型拉伸样品的断裂位置为基底，表明锻件已完全冶金粘合。

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来源期刊

Materials Research Express MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

4.50

自引率

4.30%

发文量

640

审稿时长

12 weeks

期刊介绍： A broad, rapid peer-review journal publishing new experimental and theoretical research on the design, fabrication, properties and applications of all classes of materials.

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