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

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 electro...

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Bibliographic Details
Published in:Materials research express 2024-08, Vol.11 (8), p.86501
Main Authors: Wang, Bing, Zhang, Hong-Lin, Xu, Bin, Sun, Ming-Yue, Li, Dian-Zhong
Format: Article
Language:English
Subjects:
additive forging
alloy steel
Alloy steels
Billet casting
Bonding
Continuous casting
Electron back scatter
Forging
Forgings
hot-compression bonding
Mechanical properties
Microstructure
Optical microscopy
Optical properties
Recrystallization
Tensile properties
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Summary: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.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ad6402