Effects of Mg and Mn Contents on Hot-Rolling Temperature and Resultant Tensile Properties of Al-Mg-Mn Alloys

2016 ◽  
Vol 877 ◽  
pp. 334-339
Author(s):  
Bong Hwan Kim ◽  
Ji Y. Lee ◽  
Young Ok Yoon ◽  
Shae K. Kim
Keyword(s):  
Tensile Properties ◽  
Hot Rolling ◽  
Work Hardening ◽  
Rolling Temperature ◽  
Combined Effects ◽  
Surface Cracking ◽  
Rolling Experiment ◽  
Mn Content ◽  
Rolling Temperatures ◽  
Hot Rolled

The effects of Mg and Mn contents on hot-rolling temperature and resultant tensile properties of Al-Mg-Mn alloys were investigated. The Al-3.5Mg-0.3 alloy as a reference and Al-7.5Mg-0.3Mn, Al-3.5Mg-1.0Mn alloys were prepared by casting for hot-rolling experiment. The rolling temperatures of both Al-7.5Mg-0.3Mn and Al-3.5Mg-1.0Mn alloys had to be decreased due to surface cracking during hot-rolling, which is caused by increased fractions of Mg-containing phases like Mg2Al3. The tensile strength of the hot-rolled Al-7.5Mg-0.3Mn alloy was highly increased by the combined effects of enhanced solid-solution and work-hardening at lower rolling temperature. And the resultant tensile strengths of the hot-rolled Al-3.5Mg-1.0Mn alloy were also increased due to dispersoid hardening by increased Mn content and work hardening during hot-rolling.

The Effect of Rolling Temperature on Grain Size and Toughness in Hot Rolled Q345E H-Beam Steel

2018 ◽  
Vol 279 ◽  
pp. 26-29
Author(s):  
Li Ping Sun ◽  
Guo Hui Zhu ◽  
Jun Xing ◽  
Qi Wei Chen
Keyword(s):  
Grain Size ◽  
Rolling Temperature ◽  
Experimental Results ◽  
Average Grain Size ◽  
H Beam ◽  
Rolling Temperatures ◽  
Hot Rolled

The effect of enter rolling temperatures on the grain size and toughness was investigated in Q345E H-beam steels. The experimental results shown that the grain size exhibited a complicated phenomenon with rolling temperature instead of refining as the temperature decreased as expected. It would be interpreted by the behaviors of deformation and recrystallization in austenite during rolling. The toughness is not only depended on the average grain size but also on the distribution of grain size as well as morphology of pearlite. The toughness would be decreased by the mixed grain size.

scholarly journals Influence of Rolling Temperatures on Interface Microstructure and Mechanical Properties of Multi-Pass Rolling TA1/Q235B Explosive Welded Sheets

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1654
Author(s):  
Huizhong Li ◽  
Liangming Cao ◽  
Xiaopeng Liang ◽  
Wending Zhang ◽  
Chunping Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Shear Strength ◽  
Hot Rolling ◽  
Transition Layer ◽  
Rolling Temperature ◽  
Rolled Sheet ◽  
Interface Microstructure ◽  
Microstructure And Mechanical Properties ◽  
Rolling Temperatures

The effect of rolling temperatures on the interface microstructure and mechanical properties is investigated using 2-mm-thick TA1/Q235B composite sheets, which were prepared after nine passes of hot rolling of explosive welded plates. The results show that the vortex region and the transition layer exist in the interface at the explosive welded plate, while only the transition layer exists in the interface after hot rolling. The transition layer is composed of α-Ti, TiC, Fe, and FeTi, and the thickness increases with the increasing rolling temperature. The microhardness of the explosive welded plate is higher than that of the hot-rolling sheet, and the microhardness of interface are higher than that of matrix metals. The interface shear strength and tensile elongation of the hot-rolled sheet increase with the increasing hot rolling temperature, while the ultimate tensile strength (UTS), yield strength (YS) and Young modulus decrease with the increase of hot rolling temperature. The shear strength of sheets is related to the interfacial compounds, and the tensile strength is mainly affected by the grain morphology of the matrix.

Research on Hot-Rolling Technics of a Nickel-Based Corrosion Resistant Alloy

2011 ◽  
Vol 199-200 ◽  
pp. 1861-1864
Author(s):  
Yan Fang Li
Keyword(s):  
Mechanical Properties ◽  
Hot Rolling ◽  
Annealing Temperature ◽  
True Strain ◽  
Rolling Temperature ◽  
Different Temperatures ◽  
Temperature Ranges ◽  
Corrosion Resistant Alloy ◽  
Hot Rolling Mill ◽  
Hot Rolled

To improve the hot-rolled processing rate and mechanical properties of Monel alloy plates, its hot-rolling and heat treatment technics were researched, and reasonable hot-rolling temperature and annealing temperature were designed. Through the hot-rolling tests of Monel alloy plates ingots under the condition of different temperatures with a hot-rolling mill, the true stress and true strain curves were measured, the regularity of the flow stress influenced by temperature was investigated, and the hot-rolling temperature was ensured. We also did some study on the effects of annealing temperature on the mechanical properties and metallographs. The results show the reasonable hot-rolling temperature of Monel alloy plates ranges between 1050°C and 1150°C, and its annealing temperature ranges between 650°C and 750°C.

scholarly journals Effect of Mn Addition on Hot-Working Behavior and Microstructure of Hot-Rolled Medium-Mn Steels

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 354
Author(s):  
Adam Skowronek ◽  
Dariusz Woźniak ◽  
Adam Grajcar
Keyword(s):  
Production Process ◽  
Retained Austenite ◽  
Thermomechanical Processing ◽  
True Strain ◽  
Hot Forging ◽  
Rolling Temperature ◽  
Thermomechanical Rolling ◽  
Mn Content ◽  
Hot Rolled ◽  
Positive Effect

Hot plastic working behavior and microstructure evolution were investigated during a production process of four medium-Mn steels, which differed in Mn (3 and 5%) and Nb contents. The production process started with casting, followed by hot forging, rough hot-rolling and concluded with final thermomechanical processing, which was performed to obtain multiphase bainite-based alloys with some fractions of retained austenite. The rough rolling was composed of four passes with total true strain of 0.99 and finishing rolling temperature of 850 °C, whereas thermomechanical processing contained five passes and total true strain of 0.95 at a finishing rolling temperature of 750 °C. During the process, the force parameters were recorded, which showed that the rolling forces for steels containing 3% Mn are higher compared to the 5% Mn alloys. There was no significant influence of Nb on the rolling parameters. The produced as-cast microstructures were composed of dendritic bainitic-martensitic phases. A positive effect of Nb micro-addition on a refinement of the as-cast structure was noticed. The thermomechanical processed steels showed fine multiphase microstructures with some fractions of retained austenite, the fraction of which depended on the Mn content in steel. The steels containing 3% Mn generated higher forces both during rough and thermomechanical rolling, which is related to slower recrystallization softening in these alloys compared to the steels containing 5% Mn.

Rolling Temperature for Steel Hot Flat Rolled at Low Strain Rates

2009 ◽  
Vol 62-64 ◽  
pp. 317-323
Author(s):  
P.O. Aiyedun ◽  
S.A. Aliu
Keyword(s):  
Hot Rolling ◽  
High Strain ◽  
Geometric Mean ◽  
Rolling Temperature ◽  
Strain Rates ◽  
Averaging Methods ◽  
Flat Rolling ◽  
Experimental Values ◽  
Rolling Load ◽  
Rolling Temperatures

Different methods of obtaining averages have been used to determine mean rolling temperatures from measured temperatures of various specimens during roll contact in hot flat rolling. The obtained mean rolling temperatures were used in turn in hot rolling simulation programs based on Sims, and Bland and Ford’s theories for calculating rolling loads and torque during hot flat rolling of steels at low strain rates (0.08 – 1.5 s-1). The hot rolling Bland and Ford’s (HRBF) Theory and Sim’s Theory gave similar results when any of the averaging methods of temperature is used to calculate rolling load and torque at high strain rates (1.5 –500s-1). However at low strain rates HRBF gave closer approximations to experimental results. Comparing the results with experimental values, the harmonic mean was found to give the best mean rolling temperature for hot flat rolling simulation at low strain rates compared to geometric mean, arithmetic mean and root mean square.

scholarly journals Effect of Preheating Temperature on the Microstructure and Tensile Properties of 6061 Aluminum Alloy Processed by Hot Rolling-Quenching

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 182 ◽  
Author(s):  
Qing-Long Zhao ◽  
Tong-Tong Shan ◽  
Run Geng ◽  
Yang-Yang Zhang ◽  
Hong-Yun He ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Tensile Properties ◽  
Hot Rolling ◽  
Dynamic Recovery ◽  
Tensile Elongation ◽  
Short Term ◽  
6061 Aluminum Alloy ◽  
Preheating Temperature ◽  
Hot Rolled

The present work investigates the microstructure and tensile properties of a hot rolled 6061 alloy quenched by cold rolls (RQ) at different preheating temperatures. The preheating temperature strongly affects microstructure evolution and mechanical properties. Low preheating temperature (490 °C) resulted in both low strength and low elongation. The RQ alloy preheated at 540 °C exhibited improved ductility compared to those subjected to T6 and T8 temper, and comparable strength to that after T8 temper. The dynamic recovery during hot rolling contributed to the improved tensile elongation and retained work hardening. High preheating temperature also led to pronounced ageing hardening during short-term ageing.

Study on Texture and Deep Drawability of Ti-IF Steel Sheets Hot-Rolled in Ferrite Region

2013 ◽  
Vol 331 ◽  
pp. 551-554 ◽  
Author(s):  
Fu Tao Han ◽  
Zuo Cheng Wang ◽  
Cai Nian Jing ◽  
Jie Su ◽  
Xiao Min Liu ◽  
...  
Keyword(s):  
Hot Rolling ◽  
Recrystallization Texture ◽  
Rolling Temperature ◽  
If Steel ◽  
Deep Drawability ◽  
Steel Sheets ◽  
R Value ◽  
Ferrite Region ◽  
Effect Of Hot Rolling ◽  
Hot Rolled

The effect of hot rolling temperature and reduction in ferrite region on the microstructure, texture and deep drawability of Ti-IF steel sheets were investigated. The results showed that after ferritic hot rolling and annealing, Ti-IF steel sheets developed uniform equiaxed ferrite grains and strong <111>//ND recrystallized fibers, the maximum r-value was 1.725 and good deep drawability was achieved. The deep drawability was improved with the decrease of ferritic hot rolling temperature, also enhanced with the increase of reduction in ferrite region. Texture analysis indicated that low hot rolling temperature and large reduction in ferrite region could increase the intensities of favorable {111}<112> and {554}<225> recrystallization textures and also reduce that of unfavorable {001}<110> recrystallization texture, therefore the r-value and deep drawability were enhanced.

Influence of Composition and Hot Rolling Conditions on Microstructure and Texture of Nb-Ti Stabilized FSS

2011 ◽  
Vol 55-57 ◽  
pp. 1926-1931
Author(s):  
Yan Dong Liu ◽  
Yi Qiao Yang
Keyword(s):  
Hot Rolling ◽  
Rolling Temperature ◽  
Band Width ◽  
Fibre Texture ◽  
Hot Band ◽  
Effect Of Hot Rolling ◽  
Hot Rolled ◽  
Hot Rolling Conditions

In this paper, the influence of chemical compositon on the formability of γ-fibre texture, and the hot band microstrcture has been studied. Experiments have been conducted to investigate the effect of hot rolling conditions. Nb-Ti added and Nb-Ti free specimens hot rolled in differencd hot rolling conditions have been compared. The results show that, the change in band width is dependent on hot rolling tempreture. When the hot band are rolled at the temperature of 1150-950 °C, large sizes on ferrite grain are observed, and this character is presented more obviously in the specimen with no Nb-Ti. As the incresaing of the hot rolling temperature, the intensity of γ-fibre texture decreases. γ-fibre texture presented in Nb-Ti added specimen is stronger under three hot rolling conditions.

Microstructure, Texture and Mechanical Properties of Mg-2.0Zn-0.3Gd Alloy Sheets Fabricated by Large Strain Hot Rolling

2014 ◽  
Vol 788 ◽  
pp. 23-27 ◽  
Author(s):  
Jun Luo ◽  
Hong Yan ◽  
Rong Shi Chen ◽  
En Hou Han
Keyword(s):  
Mechanical Properties ◽  
Hot Rolling ◽  
Large Strain ◽  
Shear Bands ◽  
Rolling Process ◽  
Rolling Temperature ◽  
Obvious Effect ◽  
Peak Intensity ◽  
Hot Rolling Process ◽  
Rolling Temperatures

Mg-2Zn-0.3Gd sheets processed by large strain hot rolling with one pass of 80% reduction at 200°C and 250°C were selected to investigate the rolling temperature effect on the microstructure, texture and mechanical properties of Mg-2Zn-0.3Gd sheets after rolling and subsequent annealing. It was found that the rolling temperatures in the present study seemed to have no obvious effect on the microstructure of Mg-2Zn-0.3Gd sheets during large strain hot rolling process. High density of shear bands and numerous intersected twins but free of DRX grains were observed in the microstructure of both sheets. The Mg-2Zn-0.3Gd sheets showed non-basal textures with peaks tilting to TD after annealing. While the peak intensity of (0002) pole figure increased as the rolling temperature decreasing. Tensile testing results revealed that the Mg-2Zn-0.3Gd sheets rolled at both temperature displayed high room temperature ductility about 40% after annealing, which is due to the existence of non-basal texture.

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