U.S. Department of EnergyOffice of Scientific and Technical Information
Effects of Intercritical Annealing Temperature on Mechanical Properties of Fe-7.9Mn-0.14Si-0.05Al-0.07C Steel
Abstract
A medium Mn steel has been designed to achieve an excellent combination of strength and ductility based on the TRIP (Transformation Induced Plasticity) concept for automotive applications. Following six passes of hot rolling at 850 °C, the Fe-7.9Mn-0.14Si-0.05Al-0.07C (wt.%) steel was warm-rolled at 630 °C for seven passes and subsequently air cooled to room temperature. The sample was subsequently intercritically annealed at various temperatures for 30 min to promote the reverse transformation of martensite into austenite. The obtained results show that the highest volume fraction of austenite is 39% for the sample annealed at 600 °C. This specimen exhibits a yield stress of 910 MPa and a high ultimate tensile stress of 1600 MPa, with an elongation-to-failure of 0.29 at a strain rate of 1 × 10⁻³/s. The enhanced work-hardening ability of the investigated steel is closely related to martensitic transformation and the interaction of dislocations. Especially, the alternate arrangement of acicular ferrite (soft phase) and ultrafine austenite lamellae (50–200 nm, strong and ductile phase) is the key factor contributing to the excellent combination of strength and ductility. On the other hand, the as-warm-rolled sample also exhibits the excellent combination of strength and ductility, with elongation-to-failure much higher than thosemore »
- Authors:
-
- Northeastern Univ., Shenyang (China)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1188950
- Report Number(s):
- PNNL-SA-108028
Journal ID: ISSN 1996-1944; MATEG9; 600306000
- Grant/Contract Number:
- AC05-76RL01830
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Materials
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 12; Journal ID: ISSN 1996-1944
- Publisher:
- MDPI
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; medium Mn steel; TRIP effect; austenite; strength; ductility
Citation Formats
Zhao, Xianming, Shen, Yongfeng, Qiu, Lina, Liu, Yandong, Sun, Xin, and Zuo, Liang. Effects of Intercritical Annealing Temperature on Mechanical Properties of Fe-7.9Mn-0.14Si-0.05Al-0.07C Steel. United States: N. p., 2014.
Web. doi:10.3390/ma7127891.
Zhao, Xianming, Shen, Yongfeng, Qiu, Lina, Liu, Yandong, Sun, Xin, & Zuo, Liang. Effects of Intercritical Annealing Temperature on Mechanical Properties of Fe-7.9Mn-0.14Si-0.05Al-0.07C Steel. United States. https://doi.org/10.3390/ma7127891
Zhao, Xianming, Shen, Yongfeng, Qiu, Lina, Liu, Yandong, Sun, Xin, and Zuo, Liang. 2014.
"Effects of Intercritical Annealing Temperature on Mechanical Properties of Fe-7.9Mn-0.14Si-0.05Al-0.07C Steel". United States. https://doi.org/10.3390/ma7127891. https://www.osti.gov/servlets/purl/1188950.
@article{osti_1188950,
title = {Effects of Intercritical Annealing Temperature on Mechanical Properties of Fe-7.9Mn-0.14Si-0.05Al-0.07C Steel},
author = {Zhao, Xianming and Shen, Yongfeng and Qiu, Lina and Liu, Yandong and Sun, Xin and Zuo, Liang},
abstractNote = {A medium Mn steel has been designed to achieve an excellent combination of strength and ductility based on the TRIP (Transformation Induced Plasticity) concept for automotive applications. Following six passes of hot rolling at 850 °C, the Fe-7.9Mn-0.14Si-0.05Al-0.07C (wt.%) steel was warm-rolled at 630 °C for seven passes and subsequently air cooled to room temperature. The sample was subsequently intercritically annealed at various temperatures for 30 min to promote the reverse transformation of martensite into austenite. The obtained results show that the highest volume fraction of austenite is 39% for the sample annealed at 600 °C. This specimen exhibits a yield stress of 910 MPa and a high ultimate tensile stress of 1600 MPa, with an elongation-to-failure of 0.29 at a strain rate of 1 × 10⁻³/s. The enhanced work-hardening ability of the investigated steel is closely related to martensitic transformation and the interaction of dislocations. Especially, the alternate arrangement of acicular ferrite (soft phase) and ultrafine austenite lamellae (50–200 nm, strong and ductile phase) is the key factor contributing to the excellent combination of strength and ductility. On the other hand, the as-warm-rolled sample also exhibits the excellent combination of strength and ductility, with elongation-to-failure much higher than those annealed at temperatures above 630 °C.},
doi = {10.3390/ma7127891},
url = {https://www.osti.gov/biblio/1188950},
journal = {Materials},
issn = {1996-1944},
number = 12,
volume = 7,
place = {United States},
year = {Tue Dec 09 00:00:00 EST 2014},
month = {Tue Dec 09 00:00:00 EST 2014}
}
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Microstructure, tensile and toughness properties after quenching and partitioning treatments of a medium-carbon steel
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Localized Deformation in Multiphase, Ultra-Fine-Grained 6 Pct Mn Transformation-Induced Plasticity Steel
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On the Low Temperature Strain Aging of Bainite in the TRIP Steel
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Effect of Retained Austenite on the Fracture Toughness of Quenching and Partitioning (Q&P)-Treated Sheet Steels
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Study of TRIP-Aided Bainitic Ferritic Steels Produced by Hot Press Forming
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Microstructure-based model for the static mechanical behaviour of multiphase steels
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The fracture toughness of TRIP-assisted multiphase steels
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Microstructure-based constitutive modeling of TRIP steel: Prediction of ductility and failure modes under different loading conditions
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Deformation-induced austenite grain rotation and transformation in TRIP-assisted steel
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Atomic scale effects of alloying, partitioning, solute drag and austempering on the mechanical properties of high-carbon bainitic–austenitic TRIP steels
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Partitioning of carbon from supersaturated plates of ferrite, with application to steel processing and fundamentals of the bainite transformation
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Effect of retained austenite characteristics on fatigue behavior and tensile properties of transformation induced plasticity steel
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- Materials & Design, Vol. 32, Issue 10
Tensile behaviors of IF steel with different cold-rolling reductions
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- Materials Science and Engineering: A, Vol. 496, Issue 1-2
Effect of microstructure on retained austenite stability and work hardening of TRIP steels
journal, May 2011
- Chiang, J.; Lawrence, B.; Boyd, J. D.
- Materials Science and Engineering: A, Vol. 528, Issue 13-14
A micro-alloyed ferritic steel strengthened by nanoscale precipitates
journal, October 2011
- Shen, Y. F.; Wang, C. M.; Sun, X.
- Materials Science and Engineering: A, Vol. 528, Issue 28
Microstructure, tensile and toughness properties after quenching and partitioning treatments of a medium-carbon steel
journal, January 2013
- Paravicini Bagliani, E.; Santofimia, M. J.; Zhao, L.
- Materials Science and Engineering: A, Vol. 559
Effects of cold rolling on microstructure and mechanical properties of Fe–30Mn–3Si–4Al–0.093C TWIP steel
journal, January 2013
- Shen, Y. F.; Qiu, C. H.; Wang, L.
- Materials Science and Engineering: A, Vol. 561
Improved ductility of a transformation-induced-plasticity steel by nanoscale austenite lamellae
journal, October 2013
- Shen, Y. F.; Liu, Y. D.; Sun, X.
- Materials Science and Engineering: A, Vol. 583
Austenite stabilization through manganese enrichment
journal, January 2011
- De Moor, Emmanuel; Matlock, David K.; Speer, John G.
- Scripta Materialia, Vol. 64, Issue 2
The effect of morphology on the stability of retained austenite in a quenched and partitioned steel
journal, March 2013
- Xiong, X. C.; Chen, B.; Huang, M. X.
- Scripta Materialia, Vol. 68, Issue 5
Origin of intergranular fracture in martensitic 8Mn steel at cryogenic temperatures
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Size-induced enhanced mechanical properties of nanocomposite copper/niobium wires: nanoindentation study
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High tensile ductility in a nanostructured metal
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On the sources of work hardening in multiphase steels assisted by transformation-induced plasticity
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- Jacques, Q. Furnémont, A. M., P.
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Ultrahigh Strength and High Electrical Conductivity in Copper
journal, April 2004
- Lu, L.
- Science, Vol. 304, Issue 5669
Revealing the Maximum Strength in Nanotwinned Copper
journal, January 2009
- Lu, L.; Chen, X.; Huang, X.
- Science, Vol. 323, Issue 5914
The Developments of Cold-rolled TRIP-assisted Multiphase Steels. Al-alloyed TRIP-assisted Multiphase Steels.
journal, January 2001
- Jacques, P. J.; Girault, E.; Mertens, A.
- ISIJ International, Vol. 41, Issue 9
Works referencing / citing this record:
The Role of Transformation-Induced Plasticity in the Development of Advanced High Strength Steels
journal, March 2018
- Liu, Li; He, Binbin; Huang, Mingxin
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The TRIP Effect and Its Application in Cold Formable Sheet Steels: The TRIP Effect and Its Application in Cold Formable
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Influence of pre-strain on microstructural characteristics and tensile deformation behaviour of a cold-rolled Al-containing medium Mn steel
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Medium-manganese steels processed by austenite-reverted-transformation annealing for automotive applications
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A medium-Mn steel processed by novel twin-roll strip casting route
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Microstructure and Mechanical Properties of Hot- Rolled and Cold-Rolled Medium-Mn TRIP Steels
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Microstructure-Tensile Properties Relationship and Austenite Stability of a Nb-Mo Micro-Alloyed Medium-Mn TRIP Steel
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Microstructure and Mechanical Properties of Hot- Rolled and Cold-Rolled Medium-Mn TRIP Steels
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