Characterization of microstructures and tensile properties of TRIP-aided steels with different matrix microstructure

Wang,C, Ding,H, Cai,M and Rolfe,B 2014, Characterization of microstructures and tensile properties of TRIP-aided steels with different matrix microstructure, Materials Science and Engineering A, vol. 610, pp. 65-75, doi: 10.1016/j.msea.2014.05.029.

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Title Characterization of microstructures and tensile properties of TRIP-aided steels with different matrix microstructure
Author(s) Wang,C
Ding,H
Cai,M
Rolfe,BORCID iD for Rolfe,B orcid.org/0000-0001-8516-6170
Journal name Materials Science and Engineering A
Volume number 610
Start page 65
End page 75
Total pages 11
Publisher Elsevier BV
Place of publication Amsterdam , Netherlands
Publication date 2014-07
ISSN 0921-5093
Keyword(s) Instantaneous n value
Microstructure
Retained austenite
Tensile property
TRIP steel
Science & Technology
Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Science & Technology - Other Topics
Materials Science
INDUCED PLASTICITY STEELS
STRAIN-INDUCED TRANSFORMATION
MECHANICAL-PROPERTIES
ALLOYING ELEMENTS
MULTIPHASE STEELS
BAINITIC FERRITE
CARBON
STRENGTH
DUCTILITY
Summary Three different heat treatment processes have been proposed as a fundamental method to produce three kinds of TRIP-aided steels with polygonal ferritic matrix (F-TRIP), bainitic matrix (B-TRIP) and martensitic matrix (M-TRIP) in a newly designed low alloy carbon steel. By means of dilatometry study and detailed characterization, the relationships among transformation, microstructure and the resulting mechanical behavior were compared and analyzed for the three cases. The work hardening of the samples was evaluated by calculating the instantaneous n value as a function of strain. The M-TRIP sample exhibits the highest strength with the highest work hardening rate at low strains and subsequent rapid descending at high strains. In contrast, the B-TRIP sample has relatively high continuously constant work hardening behavior over strain levels greater than 0.067. The difference in work hardening behavior corresponds directly to the rate of the retained austenite-martensitic transformation during straining, which can be attributed to the carbon content, the morphology of the retained austenite and the matrix microstructure in the respective TRIP-aided samples. © 2014 Elsevier B.V.
Language eng
DOI 10.1016/j.msea.2014.05.029
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861103 Basic Iron and Steel Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Elsevier BV
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070755

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