On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel
In this contribution, we investigate the influence of three heat treatments, including intercritical annealing (IA), quenching and partitioning (Q&P), and combination of IA and Q&P (IA-Q&P), on microstructure and mechanical properties of the medium Mn steel. The steel treated...
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2020-07-01
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doaj-fe59bfb8d31d464ba142f119d4f166c52020-11-25T03:49:31ZengFrontiers Media S.A.Frontiers in Materials2296-80162020-07-01710.3389/fmats.2020.00256564966On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn SteelShuai PanBinbin HeIn this contribution, we investigate the influence of three heat treatments, including intercritical annealing (IA), quenching and partitioning (Q&P), and combination of IA and Q&P (IA-Q&P), on microstructure and mechanical properties of the medium Mn steel. The steel treated by the IA process has the largest volume fraction of austenite, which is responsible for the longest elongation and largest energy absorption with the operation of both transformation-induced plasticity (TRIP) effect and twinning-induced plasticity (TWIP) effects. The medium Mn steel produced by IA-Q&P treatment has a mixture microstructure with retained austenite, ferrite, and lath martensite. The existence of martensite in the IA-Q&P steel makes the higher yield strength than that of the IA steel. The better uniform elongation of the IA-Q&P steel than that of the Q&P steel is ascribed to the larger volume fraction of retained austenite and higher mechanical stability of austenite. The Q&P steel has the highest yield stress due to its martensite matrix. It is expected that the tensile properties of medium Mn steel can be tuned by different thermal processes (IA, Q&P, and IA-Q&P) to facilitate its broad automotive applications.https://www.frontiersin.org/article/10.3389/fmats.2020.00256/fulladvanced high strength steelsmartensitic transformationdeformation twinsquenching and partitioningintercritical annealingmedium Mn steel |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shuai Pan Binbin He |
spellingShingle |
Shuai Pan Binbin He On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel Frontiers in Materials advanced high strength steels martensitic transformation deformation twins quenching and partitioning intercritical annealing medium Mn steel |
author_facet |
Shuai Pan Binbin He |
author_sort |
Shuai Pan |
title |
On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel |
title_short |
On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel |
title_full |
On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel |
title_fullStr |
On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel |
title_full_unstemmed |
On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel |
title_sort |
on the variants of thermal process in developing strong and ductile medium mn steel |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Materials |
issn |
2296-8016 |
publishDate |
2020-07-01 |
description |
In this contribution, we investigate the influence of three heat treatments, including intercritical annealing (IA), quenching and partitioning (Q&P), and combination of IA and Q&P (IA-Q&P), on microstructure and mechanical properties of the medium Mn steel. The steel treated by the IA process has the largest volume fraction of austenite, which is responsible for the longest elongation and largest energy absorption with the operation of both transformation-induced plasticity (TRIP) effect and twinning-induced plasticity (TWIP) effects. The medium Mn steel produced by IA-Q&P treatment has a mixture microstructure with retained austenite, ferrite, and lath martensite. The existence of martensite in the IA-Q&P steel makes the higher yield strength than that of the IA steel. The better uniform elongation of the IA-Q&P steel than that of the Q&P steel is ascribed to the larger volume fraction of retained austenite and higher mechanical stability of austenite. The Q&P steel has the highest yield stress due to its martensite matrix. It is expected that the tensile properties of medium Mn steel can be tuned by different thermal processes (IA, Q&P, and IA-Q&P) to facilitate its broad automotive applications. |
topic |
advanced high strength steels martensitic transformation deformation twins quenching and partitioning intercritical annealing medium Mn steel |
url |
https://www.frontiersin.org/article/10.3389/fmats.2020.00256/full |
work_keys_str_mv |
AT shuaipan onthevariantsofthermalprocessindevelopingstrongandductilemediummnsteel AT binbinhe onthevariantsofthermalprocessindevelopingstrongandductilemediummnsteel |
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