scholarly journals Mechanism of Microstructural Control and Mechanical Properties in Hot Rolled Plain C–Mn Steel during Controlled Cooling

2015 ◽  
Vol 55 (8) ◽  
pp. 1721-1729 ◽  
Author(s):  
Chengning Li ◽  
Guo Yuan ◽  
Fengqin Ji ◽  
Jian Kang ◽  
Devesh Misra ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Controlled Cooling ◽  
Hot Rolled ◽  
Mn Steel ◽  
Microstructural Control

Development of an Ultrafine Grained Ferrite in a Low C-Mn Steel Intensely Deformed under Hot Torsion

2004 ◽  
Vol 467-470 ◽  
pp. 1271-1276
Author(s):  
G. Azevedo ◽  
Ronaldo Barbosa ◽  
Dagoberto Brandão Santos
Keyword(s):  
Mechanical Properties ◽  
Grain Sizes ◽  
Dynamic Transformation ◽  
Ultrafine Grained ◽  
Size And Morphology ◽  
Hot Torsion ◽  
Hot Rolled ◽  
Mn Steel ◽  
Ferrite Grain Size ◽  
Torsion Deformation

In the last years, several studies concerning ultra refinement of ferrite grains have been conducted using different experimental techniques (ECAP, ARB, HPT). The aim of all investigations was to provide an optmized relationship between mechanical properties and microstructure of steels. The present work, likewise, deals with strain induced dynamic transformation of ferrite. Samples of low C-Mn steel were intensely deformed in hot torsion aiming at the production of ultrafine grains of ferrite thereby enhancing the mechanical properties when compared to hot rolled products. After soaking during 5min at 900°C, the samples were quenched and then reheated and submitted to hot torsion deformation at temperatures of 700 and 740°C. The torsion schedule consisted of 7 isothermal passes leading to a total strain of ≈1, generating an ultrafine microstructure with grain sizes of the order of 1µm. The shape of stress-strain curves so obtained suggested that ferrite refinement occurred by dynamic recrystallization. The various constituents present in the microstructure as well as ferrite grain size and morphology were examined by optical and scanning electron microscopy. Microhardness tests were performed to evaluate mechanical properties.

scholarly journals Effects of Nb and Mo Addition to 0.2%C-1.5%Si-1.5%Mn Steel on Mechanical Properties of Hot Rolled TRIP-aided Steel Sheets

2004 ◽  
Vol 44 (9) ◽  
pp. 1590-1598 ◽  
Author(s):  
Shunichi Hashimoto ◽  
Shushi Ikeda ◽  
Koh-ichi Sugimoto ◽  
Syugo Miyake
Keyword(s):  
Mechanical Properties ◽  
Steel Sheets ◽  
Hot Rolled ◽  
Mn Steel

Effect of Al on the Microstructure and Mechanical Properties of Hot-Rolled Medium-Mn Steel

2018 ◽  
Vol 941 ◽  
pp. 292-298 ◽  
Author(s):  
Ding Ting Han ◽  
Yun Bo Xu ◽  
Ying Zou ◽  
Zhi Ping Hu ◽  
Shu Qing Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Trip Steel ◽  
Retained Austenite ◽  
Mechanical Stability ◽  
Volume Fraction ◽  
Microstructure And Mechanical Properties ◽  
Medium Mn Steel ◽  
Hot Rolled ◽  
Mn Steel

The present investigation was made to study the effect of Al on the microstructure and mechanical properties of hot-rolled medium-Mn TRIP steel (abbreviated as Al-TRIP). As a contrast, a Si-added medium-Mn TRIP steel (abbreviated as Si-TRIP) was also studied. Addition Al in medium-Mn steel can raise Ac3 temperature, which will restrain austenite transformation and expand the two-phase region, promoting Mn and C elements enriched in austenite. In-depth microstructure and mechanical properties analysis were carried out for the hot-rolled Al-TRIP and Si-TRIP steels in this study. The microstructure was characterized by scanning electron microscope (SEM) and electron probe microanalyzer (EPMA). Volume fraction of retained austenite was measured by D/max2400 X-ray diffractometer (XRD). A dual-phase microstructure consisting of ultra-fine grained intercritical ferrite (IF) and lath-like retained austenite (RA) with high mechanical stability was obtained after annealing at 630°C for 2h for Al-TRIP steel. As prolonging the intercritical annealing time, the stability of RA decreased primarily due to the increase of grain size. The tensile test results indicated that the Al-TRIP steel possessed a better combination of tensile strength and elongation compared to Si-TRIP steel. Excellent mechanical properties with yield strength of 790MPa, tensile strength of 1050MPa, total elongation of 35% and UTS×TEL of 39GPa·% was obtained for the Al-TRIP steel.

Microstructure and mechanical properties of hot-rolled medium-Mn steel containing 3% aluminum

2017 ◽  
Vol 682 ◽  
pp. 45-53 ◽  
Author(s):  
Chengwei Shao ◽  
Weijun Hui ◽  
Yongjian Zhang ◽  
Xiaoli Zhao ◽  
Yuqing Weng
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Medium Mn Steel ◽  
Hot Rolled ◽  
Mn Steel

Microstructure and mechanical properties of a novel hot-rolled 4% Mn steel processed by intercritical annealing

2018 ◽  
Vol 53 (17) ◽  
pp. 12570-12582 ◽  
Author(s):  
He-song Wang ◽  
Guo Yuan ◽  
Meng-fei Lan ◽  
Jian Kang ◽  
Yuan-xiang Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Intercritical Annealing ◽  
Microstructure And Mechanical Properties ◽  
Hot Rolled ◽  
Mn Steel

scholarly journals Microstructure and Mechanical Properties of Novel Quasibinary Al-Cu-Yb and Al-Cu-Gd Alloys

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 476
Author(s):  
Sayed Amer ◽  
Ruslan Barkov ◽  
Andrey Pozdniakov
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Mechanism Of Action ◽  
Annealing Temperature ◽  
Eutectic Reaction ◽  
Solidification Process ◽  
Annealed State ◽  
Microstructure And Mechanical Properties ◽  
Cold Rolled ◽  
Hot Rolled

Microstructure of Al-Cu-Yb and Al-Cu-Gd alloys at casting, hot-rolled -cold-rolled and annealed state were observed; the effect of annealing on the microstructure was studied, as were the mechanical properties and forming properties of the alloys, and the mechanism of action was explored. Analysis of the solidification process showed that the primary Al solidification is followed by the eutectic reaction. The second Al8Cu4Yb and Al8Cu4Gd phases play an important role as recrystallization inhibitor. The Al3Yb or (Al, Cu)17Yb2 phase inclusions are present in the Al-Cu-Yb alloy at the boundary between the eutectic and aluminum dendrites. The recrystallization starting temperature of the alloys is in the range of 250–350 °C after rolling with previous quenching at 590 and 605 °C for Al-Cu-Yb and Al-Cu-Gd, respectively. The hardness and tensile properties of Al-Cu-Yb and Al-Cu-Gd as-rolled alloys are reduced by increasing the annealing temperature and time. The as-rolled alloys have high mechanical properties: YS = 303 MPa, UTS = 327 MPa and El. = 3.2% for Al-Cu-Yb alloy, while YS = 290 MPa, UTS = 315 MPa and El. = 2.1% for Al-Cu-Gd alloy.

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