Influence of hot rolling on the microstructure of lean duplex stainless steel 2101

In this work, the microstructure and the strain partitioning of lean duplex stainless steel 2101 (LDX 2101) during different hot-rolling processes are investigated by optical microscopy and electron-backscattered diffraction (EBSD). The results show that the LDX 2101 exhibits poor thermoplasticity a...

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Bibliographic Details
Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2019-10, Vol.26 (10), p.1266-1273
Main Authors: Gao, Zhi-jun, Li, Jing-yuan, Feng, Zhi-hui, Wang, Yi-de
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Corrosion
Corrosion and Coatings
Deformation
Deformation effects
Duplex stainless steels
Edge cracks
Electron backscatter diffraction
Glass
High temperature
Hot rolling
Iron constituents
Light microscopy
Materials Science
Metallic Materials
Microstructure
Morphology
Natural Materials
Optical microscopy
Phase boundaries
Phases
Plates
Stainless steel
Strain distribution
Surfaces and Interfaces
Thermoplasticity
Thin Films
Tribology
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Summary:In this work, the microstructure and the strain partitioning of lean duplex stainless steel 2101 (LDX 2101) during different hot-rolling processes are investigated by optical microscopy and electron-backscattered diffraction (EBSD). The results show that the LDX 2101 exhibits poor thermoplasticity at high temperature. The four-pass hot-rolled plates show fewer edge-cracking defects and superior thermoplasticity compared with the two-pass hot-rolled plates prepared at different temperature. The phase boundary is the weakest site in the LDX 2101. The cracks are initiated and propagated along the phase boundaries during the hot-rolling process. According to the EBSD analysis, the increase of the hot-rolling pass can dramatically improve the strain distribution in ferrite and austenite phases and promote the strain transmission in the constituent phases, thereby improving the coordinated deformation ability of the two phases. This effect further increases the thermoplasticity and reduces the formation of edge cracks in LDX 2101.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-019-1841-6