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

Zhi-jun Gao; Jing-yuan Li; Zhi-hui Feng; Yi-de Wang

doi:10.1007/s12613-019-1841-6

Volume 26 Issue 10

Oct. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(10): 1266-1273

Zhi-jun Gao, Jing-yuan Li, Zhi-hui Feng, and Yi-de Wang, Influence of hot rolling on the microstructure of lean duplex stainless steel 2101, Int. J. Miner. Metall. Mater., 26(2019), No. 10, pp. 1266-1273. https://doi.org/10.1007/s12613-019-1841-6

Cite this article as:

Zhi-jun Gao, Jing-yuan Li, Zhi-hui Feng, and Yi-de Wang, Influence of hot rolling on the microstructure of lean duplex stainless steel 2101, Int. J. Miner. Metall. Mater., 26(2019), No. 10, pp. 1266-1273. https://doi.org/10.1007/s12613-019-1841-6

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Research Article

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

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Corresponding author:
Jing-yuan Li E-mail: lijy@ustb.edu.cn
Received: 27 December 2018; Revised: 26 March 2019; Accepted: 2 April 2019

Abstract

Abstract

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.
- lean duplex stainless steel;
- hot-rolling process;
- thermoplasticity;
- strain distribution

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