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

Heat Treatment of Ultrafine Grained AA 6061 Consolidation by Equal Channel Angular Pressing

2015 ◽  
Vol 771 ◽  
pp. 252-256 ◽  
Author(s):  
Agus Pramono ◽  
Lauri Kollo ◽  
Renno Veinthal ◽  
Kaspar Kallip ◽  
Jaana Kateriina Gomon
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Equal Channel Angular Pressing ◽  
Treatment Effect ◽  
Artificial Aging ◽  
The Other ◽  
Copper Sheet ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Recent Developments

During the last decade Equal Channel Angular Pressing (ECAP) has emerged as a widely known procedure for the fabrication of ultrafine grained metals and alloys. This review examines recent developments related to the use of ECAP for grain refinement. In the current study the part of capsules wrapper for powder material to be compressed where the powder AA6061 was wrapped in copper sheet and heated at a temperature of 400 OC in hot pressed under the pressure of 400 MPa. Afterward the powder in solid condition was cooled in the air and then does analysis characterization. The sample results of AA6061 are ECAP as is and heat treatment with type Anneal and Artificial Aging (T6) where heat treatment is heated at a temperature of 530 °C for 1 h followed by heating at a temperature of 100 °C for one day and the other for heating at a temperature of 415°C for 2.5 hours followed by heating at a temperature of 177 °C for 8 hours. This paper explains the characteristics of each sample where analyses are based on the mechanism of properties to determine how much change of mechanical properties and microstructure. Heat treatment effect on grain coarsening so that the mechanical properties can be engineered.

Microstructure and Mechanical Properties of an Ultrafine Grained Medium-Mn Steel

2018 ◽  
Vol 385 ◽  
pp. 308-313 ◽  
Author(s):  
Vladimir Torganchuk ◽  
Dmitri A. Molodov ◽  
Andrey Belyakov ◽  
Rustam Kaibyshev
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
Total Elongation ◽  
Manganese Steel ◽  
Two Phase ◽  
Microstructure And Mechanical Properties ◽  
Ultrafine Grained ◽  
Medium Manganese Steel ◽  
Medium Mn Steel ◽  
Mn Steel

The effect of cold working followed by annealing on the development of ultrafine grained microstructure and mechanical properties of an Fe-12%Mn-0.6%C-1.5%Al medium-manganese steel was studied. The steel was cold rolled with intermediate annealings and then annealed at 873 K or 923 K for 30 min. The yield strength and total elongation of the Fe-12Mn-0.6C-1.5Al steel after cold rolling were 1200 MPa and 14%, respectively. The heat treatments resulted in the formation of two phase (austenite-ferrite) ultrafine grained microstructures with average grain sizes of 0.9 to 1.2 μm, depending on the annealing temperature. The annealed ultrafine grained steel samples exhibit the yield strength in the range of 800-950 MPa, the ultimate tensile strength in the range of 1150-1200 MPa, and total elongation of 12% to 19%.

Study on the Mechanical Stability of Retained Austenite in Cold-Rolled Medium-Mn Steel

2014 ◽  
Vol 936 ◽  
pp. 1283-1289
Author(s):  
Jun Hu ◽  
Wen Quan Cao ◽  
Jie Shi ◽  
Han Dong
Keyword(s):  
Mechanical Properties ◽  
Retained Austenite ◽  
Mechanical Stability ◽  
Volume Fraction ◽  
Residual Austenite ◽  
Tensile Tests ◽  
Medium Mn Steel ◽  
Cold Rolled ◽  
Mn Steel ◽  
High Mechanical Stability

The mechanical stability of the retained austenite in the cold-rolled medium-Mn steel was studied. Tensile tests were carried out to measure the mechanical properties of the annealed steel. Scanning electron microscopy was applied to characterize the microstructure evolution during the tensile process; X-ray diffraction analysis was used to determine the residual austenite content in the deformed steel. It was found that the volume fraction of retained austenite gradually decreases with strain .The value of the stability coefficient of retained austenite k was small in the test steel, which indicated high mechanical stability of retained austenite. Due to TRIP effect, the high mechanical stability of the retained austenite strongly delays the onset of necking, which resulted in good comprehensive mechanical properties with ultrahigh strength and plasticity.

Relationship of Microstructure and Mechanical Properties in Er-Containing Aluminum Alloy

2015 ◽  
Vol 1120-1121 ◽  
pp. 1109-1114
Author(s):  
Xin Lei ◽  
Hui Huang ◽  
S.P. Wen
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Treatment Process ◽  
Mg Alloys ◽  
The Other ◽  
Heat Treatment Process ◽  
Comprehensive Performance ◽  
Relationship Of ◽  
Al Mg Alloys

This study investigated the mechanical properties and microstructures of Er-containing Al–Mg alloys. The research found that the H114-T sheet of Er-containing Al–Mg alloys showed a relative good comprehensive performance in mechanical properties. With the special rolling and heat treatment process, this H114-T sheet showed different morphology of microstructures with the other sheets in Er-containing Al–Mg alloys. Grains in H114-T sheet performed irregular shape polygon, a number of subgrains appeared in grains, the amount of dislocations in grains decreased. H114-T sheet possessed a lot of Copper texture, this may be one of important factors influenced the mechanical properties.

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

Effects of rolling and heat treatment on hydrogen embrittlement in medium-Mn steel

2021 ◽  
pp. 130784
Author(s):  
Juanping Xu ◽  
Zheng Wang ◽  
Hao Fu ◽  
Jinxu Li ◽  
Ming Wu
Keyword(s):  
Heat Treatment ◽  
Hydrogen Embrittlement ◽  
Medium Mn Steel ◽  
Mn Steel
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