Carbide precipitation behavior and mechanical properties of micro-alloyed medium Mn steel

2020 ◽  
Vol 47 ◽  
pp. 122-130 ◽  
Author(s):  
Luhan Hao ◽  
Xiang Ji ◽  
Guangqian Zhang ◽  
Wei Zhao ◽  
Mingyue Sun ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbide Precipitation ◽  
Precipitation Behavior ◽  
Medium Mn Steel ◽  
Mn Steel

scholarly journals Strengthening Mechanism and Carbide Precipitation Behavior of Nb-Mo Microalloy Medium Mn Steel

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7461
Author(s):  
Chunquan Liu ◽  
Fen Xiong ◽  
Yong Wang ◽  
Yuxin Cao ◽  
Xinbin Liu ◽  
...  
Keyword(s):  
Intercritical Annealing ◽  
Strengthening Mechanism ◽  
Carbide Precipitation ◽  
Reverse Transformation ◽  
Precipitation Behavior ◽  
Medium Mn Steel ◽  
Mn Content ◽  
Cyclic Quenching ◽  
Mn Steel ◽  
Positive Effect

This study investigates the strengthening mechanism and carbide precipitation behavior of medium Mn steel with Nb-Mo microalloy after cyclic quenching and austenite reverse transformation treatment. The results show that the Nb/Mo element not only precipitates (Nb,Mo)C in the grains, hindering the movement of dislocations and increases the strength, but also segregates at the austenite/ferrite grain boundary, thus delaying the transformation from austenite to ferrite. In addition, a large amount of nano-scale cementite is retained after cyclic quenching and austenite reverse transformation, which has a positive effect on the proportion of retained austenite in medium Mn steel. Moreover, the carbides with small size and low Mn content are dissolved, and the decomposed C and Mn content are beneficial to the nucleation of austenite during the intercritical annealing process at a temperature of 690 °C.

Microstructure and mechanical properties of a novel medium Mn steel with Cr and Mo microalloying

2021 ◽  
Vol 825 ◽  
pp. 141926
Author(s):  
Chao Wang ◽  
Liming Yu ◽  
Ran Ding ◽  
Yongchang Liu ◽  
Huijun Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Medium Mn Steel ◽  
Mn Steel

Intercritical rolling induced ultrafine microstructure and excellent mechanical properties of the medium-Mn steel

2013 ◽  
Vol 583 ◽  
pp. 84-88 ◽  
Author(s):  
R. Zhang ◽  
W.Q. Cao ◽  
Z.J. Peng ◽  
J. Shi ◽  
H. Dong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Medium Mn Steel ◽  
Mn Steel

On the intercritical annealing parameters and ensuing mechanical properties of low-carbon medium-Mn steel

2018 ◽  
Vol 733 ◽  
pp. 246-256 ◽  
Author(s):  
G.K. Bansal ◽  
D.A. Madhukar ◽  
A.K. Chandan ◽  
Ashok K. ◽  
G.K. Mandal ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Intercritical Annealing ◽  
Low Carbon ◽  
Medium Mn Steel ◽  
Mn Steel

A novel medium-Mn steel with superior mechanical properties and marginal oxidization after press hardening

2021 ◽  
Vol 205 ◽  
pp. 116567
Author(s):  
Shuoshuo Li ◽  
Pengyu Wen ◽  
Shilei Li ◽  
Wenwen Song ◽  
Yandong Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Press Hardening ◽  
Medium Mn Steel ◽  
Superior Mechanical Properties ◽  
Mn Steel

scholarly journals Influence of Microstructural Morphology on Hydrogen Embrittlement in a Medium-Mn Steel Fe-12Mn-3Al-0.05C

Metals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 929 ◽  
Author(s):  
Xiao Shen ◽  
Wenwen Song ◽  
Simon Sevsek ◽  
Yan Ma ◽  
Claas Hüter ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
The Other ◽  
Duplex Microstructure ◽  
Ultrafine Grained ◽  
Medium Mn Steel ◽  
Microstructural Morphology ◽  
Cold Rolled ◽  
Mixed Microstructure ◽  
Mn Steel

The ultrafine-grained (UFG) duplex microstructure of medium-Mn steel consists of a considerable amount of austenite and ferrite/martensite, achieving an extraordinary balance of mechanical properties and alloying cost. In the present work, two heat treatment routes were performed on a cold-rolled medium-Mn steel Fe-12Mn-3Al-0.05C (wt.%) to achieve comparable mechanical properties with different microstructural morphologies. One heat treatment was merely austenite-reverted-transformation (ART) annealing and the other one was a successive combination of austenitization (AUS) and ART annealing. The distinct responses to hydrogen ingression were characterized and discussed. The UFG martensite colonies produced by the AUS + ART process were found to be detrimental to ductility regardless of the amount of hydrogen, which is likely attributed to the reduced lattice bonding strength according to the H-enhanced decohesion (HEDE) mechanism. With an increase in the hydrogen amount, the mixed microstructure (granular + lamellar) in the ART specimen revealed a clear embrittlement transition with the possible contribution of HEDE and H-enhanced localized plasticity (HELP) mechanisms.

scholarly journals Effects of the austenitizing temperature on the mechanical properties of cold-rolled medium-Mn steel system

2017 ◽  
Vol 691 ◽  
pp. 51-59 ◽  
Author(s):  
Z.Z. Zhao ◽  
J.H. Liang ◽  
A.M. Zhao ◽  
J.T. Liang ◽  
D. Tang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Austenitizing Temperature ◽  
Medium Mn Steel ◽  
Cold Rolled ◽  
Mn Steel

scholarly journals Effect of Dendrite Fraction on the M23C6 Precipitation Behavior and the Mechanical Properties of High Cr White Irons

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1576
Author(s):  
Jun-Seok Oh ◽  
Young-Gy Song ◽  
Baig-Gyu Choi ◽  
Chalothorn Bhamornsut ◽  
Rujeeporn Nakkuntod ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Primary Dendrite ◽  
Carbide Precipitation ◽  
Eutectic Phase ◽  
M23c6 Carbide ◽  
Eutectic Solidification ◽  
Precipitation Behavior ◽  
Conventional Heat Treatment ◽  
High Fraction

High Cr white irons with various fractions of primary dendrite have been prepared through the modification of their chemical composition. Increasing C and Cr contents decreased the primary dendrite fraction. Eutectic solidification occurred with the phase fraction ratio of austenite: M7C3 = 2.76:1. The measured primary dendrite fractions were similar to the calculated results. ThermoCalc calculation successfully predicted fractions of M7C3, austenite, and M23C6. Conventional heat treatment at high temperature caused a destabilization of austenite, releasing it’s solute elements to form M23C6 carbide. Precipitation of M23C6 during destabilization preferentially occurred within primary (austenite) dendrite, however, the precipitation scarcely occurred within austenite in eutectic phase. Thus, M23C6 precipitation by destabilization was relatively easy in alloys with a high fraction of primary dendrite.

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