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  A carbide-free bainite/martensite/austenite triplex steel with enhanced mechanical properties treated by a novel quenching-partitioning-tempering process

Gao, G., Zhang, H., Tan, Z., Liu, W., & Bai, B. (2013). A carbide-free bainite/martensite/austenite triplex steel with enhanced mechanical properties treated by a novel quenching-partitioning-tempering process. Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing, 559, 165-169. doi:10.1016/j.msea.2012.08.064.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-BDEE-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-BDF0-B
Genre: Journal Article

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 Creators:
Gao, Guhui1, Author              
Zhang, Han2, Author              
Tan, Zhunli1, Author              
Liu, Wenbo3, Author              
Bai, Bingzhe1, 4, Author              
Affiliations:
1Materials Science and Engineering Research Center, Beijing Jiaotong University, Beijing, China, ou_persistent22              
2Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
3Tsinghua University, Key Laboratory of Advanced Materials, Department of Material Science & Engineering, Beijing 100084, China, persistent22              
4Key Laboratory of Advanced Materials, Department of Material Science and Engineering, Tsinghua University, Beijing, China, ou_persistent22              

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Free keywords: Alloyed steels; Partitioning step; Quenching-partitioning-tempering; Retained austenite; Ultimate tensile strength, Bainite; Elongation; Manganese; Martensitic steel; Mechanical properties; Microstructure; Quenching; Silicon; Tempering, Carbides
 Abstract: A novel quenching-partitioning-tempering (Q-P-T) process was employed in a Mn-Si-Cr alloyed steel to obtain a triplex microstructure comprising carbide-free bainite, martensite and retained austenite. The carbide-free bainite formed during the quenching step (rather than partitioning step) of Q-P-T process can enhance the mechanical properties (e.g. the product of strength and elongation, ~31.4. GPa) by extending the partitioning time up to 30. min. A good combination of strength and elongation (Ultimate tensile strength: ~1655. MPa; Elongation: ~19) has been realized for the Mn-Si-Cr alloyed high strength steel without expensive alloying, e.g. Ni, Mo, Nb in previous QP/Q-P-T processes. The enhanced mechanical properties could be attributed to the various types of retained austenite in the Q-P-T treated carbide-free bainite/martensite/austenite triplex microstructure. © 2012 Elsevier B.V.

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Language(s): eng - English
 Dates: 2013-01-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.msea.2012.08.064
BibTex Citekey: Gao2013165
 Degree: -

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Title: Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing
  Abbreviation : Mater. Sci. Eng. A: Struct. Mater. Prop. Microstruct. Process.
Source Genre: Journal
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Publ. Info: New York, NY : Elsevier
Pages: - Volume / Issue: 559 Sequence Number: - Start / End Page: 165 - 169 Identifier: ISSN: 0921-5093
CoNE: /journals/resource/954928498465_1