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Author Feng, Zhi hui ♦ Li, Jing yuan ♦ Wang, Yi de
Source SpringerLink
Content type Text
Publisher University of Science and Technology Beijing
File Format PDF
Copyright Year ©2016
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword duplex stainless steel ♦ hot rolling ♦ crack formation ♦ thermoplasticity ♦ grain size ♦ precipitates ♦ softening mechanisms ♦ Materials Science ♦ Metallic Materials ♦ Characterization and Evaluation of Materials ♦ Ceramics, Glass, Composites, Natural Methods ♦ Surfaces and Interfaces, Thin Films ♦ Tribology, Corrosion and Coatings
Abstract The thermoplasticity of duplex stainless steel 2205 (DSS2205) is better than that of lean duplex steel 2101 (LDX2101), which undergoes severe cracking during hot rolling. The microstructure, microhardness, phase ratio, and recrystallization dependence of the deformation compatibility of LDX2101 and DSS2205 were investigated using optical microscopy (OM), electron backscatter diffraction (EBSD), Thermo-Calc software, and transmission electron microscopy (TEM). The results showed that the phase-ratio transformations of LDX2101 and DSS2205 were almost equal under the condition of increasing solution temperature. Thus, the phase transformation was not the main cause for the hot plasticity difference of these two steels. The grain size of LDX2101 was substantially greater than that of DSS2205, and the microhardness difference of LDX2101 was larger than that of DSS2205. This difference hinders the transfer of strain from ferrite to austenite. In the rolling process, the ferrite grains of LDX2101 underwent continuous softening and were substantially refined. However, although little recrystallization occurred at the boundaries of austenite, serious deformation accumulated in the interior of austenite, leading to a substantial increase in hardness. The main cause of crack formation is the microhardness difference between ferrite and austenite.
ISSN 16744799
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2016-04-01
Publisher Place Beijing
e-ISSN 1869103X
Journal International Journal of Minerals, Metallurgy, and Materials
Volume Number 23
Issue Number 4
Page Count 9
Starting Page 425
Ending Page 433

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Source: SpringerLink