scholarly journals Local Deformation and Texture of Cold-Rolled AA6061 Aluminum Alloy

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1866 ◽  
Author(s):  
Diaoyu Zhou ◽  
Wenwen Du ◽  
Xiyu Wen ◽  
Junwei Qiao ◽  
Wei Liang ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Vickers Hardness ◽  
Volume Fraction ◽  
Simple Relation ◽  
Deformation Texture ◽  
Local Deformation ◽  
Thickness Reduction ◽  
Total Deformation ◽  
Curve Fit ◽  
Cold Rolled

Using cold rolling, we plastically deform AA6061 sheets at room temperature and investigate the variations of the microstructures, textures and local deformation of the cold-rolled AA6061 sheets as functions of thickness reduction (Δt/t0, t0 and t are the thicknesses of the AA6061 sheet before and after the cold rolling, respectively). The volume fraction of total deformation texture is relatively independent of the thickness reduction for Δt/t0 ≤ 30%, and becomes an approximately linearly increasing function of the thickness reduction for Δt/t0 > 30%. Increasing the thickness reduction causes the increase of the Vickers hardness of the cross-section of the cold-rolled sheets, which exhibits a similar increase trend to the volume fraction of total deformation texture for Δt/t0 > 30%. A simple relation between the Vickers hardness and the thickness reduction is established and is used to curve-fit the experimental results.

scholarly journals Tensile Properties and Damping Capacity of Cold-Rolled Fe-20Mn-12Cr-3Ni-3Si Damping Alloy

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5975
Author(s):  
Jae-Hwan Kim ◽  
Jong-Min Jung ◽  
Hyunbo Shim
Keyword(s):  
Tensile Strength ◽  
Cold Rolling ◽  
Tensile Properties ◽  
Volume Fraction ◽  
High Strength ◽  
Damping Capacity ◽  
Austenite Stability ◽  
Ε Martensite ◽  
Cold Rolled ◽  
The Relationship

The tensile properties and damping capacity of cold-rolled Fe–20Mn–12Cr–3Ni–3Si alloys were investigated. The martensitic transformation was identified, including surface relief with a specific orientation and partial intersection. Besides, as the cold rolling degree increased, the volume fraction of ε-martensite increased, whereas α’-martensite started to form at the cold rolling degree of 15% and slightly increased to 6% at the maximum cold rolling degree. This difference may be caused by high austenite stability by adding alloying elements (Mn and Ni). As the cold rolling degree increased, the tensile strength linearly increased, and the elongation decreased due to the fractional increment in the volume of martensite. However, the damping capacity increased until a 30% cold rolling degree was approached, and then decreased. The irregular tendency of the damping capacity was confirmed, depicting that it increased to a specific degree and then decreased as the tensile strength and elongation increased. Concerning the relationship between the tensile properties and the damping capacity, the damping capacity increased and culminated, and then decreased as the tensile properties and elongation increased. The damping capacity in the high-strength area tended to decrease because it is difficult to dissipate vibration energy into thermal energy in alloys with high strength. In the low-strength area, on the other hand, the damping capacity increased as the strength increased since the increased volume fraction of ε-martensite is attributed to the increase in the damping source.

Spatially Inhomogeneous Recrystallization in Ferritic Stainless Steels

2012 ◽  
Vol 715-716 ◽  
pp. 866-871 ◽  
Author(s):  
Guillaume Lefebvre ◽  
Sina Shahandeh ◽  
Chad W. Sinclair ◽  
Matthias Militzer ◽  
Jean Denis Mithieux ◽  
...  
Keyword(s):  
Static Recrystallization ◽  
Grain Shape ◽  
Deformation Texture ◽  
Local Deformation ◽  
Physical Explanation ◽  
Ferritic Stainless Steels ◽  
Spatially Inhomogeneous ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Made In

The kinetics of static recrystallization in cold rolled ferritic stainless steel sheet tends to slow drastically over the last 10-20% of recrystallization. This has its origins in both the microstructure (deformed grain shape, precipitates) and in the local deformation texture. In this work we have sought to provide a physical explanation for the slow last stages of recrystallization through a texture dependent JMAK model which is informed by the microstructure of the partially recrystallized microstructure. The geometrical assumptions made in developing this JMAK model have been compared to phase field simulations using experimental observations as the source of their starting configuration.

Analysis of Deformation Texture in AISI 304 Steel Sheets

2013 ◽  
Vol 203-204 ◽  
pp. 105-110 ◽  
Author(s):  
Agnieszka Kurc-Lisiecka ◽  
Wojciech Ozgowicz ◽  
Wiktoria Ratuszek ◽  
Joanna Kowalska
Keyword(s):  
Cold Rolling ◽  
Rolling Texture ◽  
Orientation Distribution ◽  
Deformation Texture ◽  
Distribution Functions ◽  
Rolled Strip ◽  
Aisi 304 ◽  
Aisi 304 Steel ◽  
Cold Rolled ◽  
Two Phases

The textures of cold-rolled AISI 304 austenitic steel were the object of the investigations. The austenite steel was deformed by cold-rolling to 20, 40 and 70% reduction. A significant amount of martensite, formed due to the strain induced (γ®a’) transformation, was detected in the deformed structure by applying magnetic and X-ray diffraction methods. Texture analysis was performed on the basis of the orientation distribution functions (ODFs) calculated from the experimental pole figures. The texture measurements of both phases were conducted from the center layers of the cold-rolled strip. In the case of metastable austenite AISI 304 steel the texture development was very complex because three processes were proceded simultaneously during the cold-rolling, namely: plastic deformation of the austenitic g-phase, strain induced phase transformation γ®a’ and deformation of the formed a’-martensite. These processes resulted in the presence of two phases in the structure of the steel with a definite crystallographic relationship and orientation changes of both phases with increasing of the deformation. Thus, the resultant deformation texture of the investigated steels is described by the austenite and martensite texture components. The rolling texture of γ-phase describes mainly orientations from the fiber α =<110>║ND and the major components of the martensite deformation texture are orientations from the fibers α1=<110>║RD and γ ={111}║ND.

scholarly journals Effects of Cold Rolling and Annealing Prior to Dealloying on the Microstructure of Nanoporous Gold

Nanomaterials ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 540 ◽  
Author(s):  
Hanyu Hui ◽  
Re Xia ◽  
Juying Li ◽  
Qingsong Mei ◽  
Ye Ma ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Cold Rolling ◽  
Uniform Distribution ◽  
Annealed Sample ◽  
Nanoporous Gold ◽  
Thickness Reduction ◽  
Corrosion Condition ◽  
Pore Sizes ◽  
Cold Rolling And Annealing ◽  
Cold Rolled

The properties of nanoporous gold (NPG) were known to be dependent on the microstructure of NPG. In this study, the effects of cold rolling and annealing of the original Ag0.7Au0.3 alloy on the microstructure of NPG produced by dealloying under free corrosion condition were investigated. Ag0.7Au0.3 alloy samples were cold-rolled to different strain levels/thickness reductions up to 98% and annealed at 900 °C for 3 h before dealloying. It was found that cold rolling and annealing of the original alloy can lead to reduced ligament and pore sizes of NPG. Moreover, post-deformation annealing of the original alloy was found to facilitate the formation of a homogeneous and continuous NPG structure. The minima of pore and ligament sizes (both being ~8 nm) with uniform distribution were obtained in the annealed sample with a thickness reduction of 60% for a dealloying time of 7 h. The present study indicated the significant effect of a pre-dealloying treatment of the original alloy (by plastic deformation and annealing) on the formation and optimization of the NPG microstructure produced by dealloying.

Study of Texture in 6016 Aluminum Alloy during Processing

2016 ◽  
Vol 877 ◽  
pp. 356-362
Author(s):  
Zhang Wen ◽  
Ying Ying Liu ◽  
Zhi Hong Jia ◽  
Pi Zhi Zhao ◽  
Zhi Qing Zhang ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Shear Bands ◽  
Deformation Texture ◽  
Continuous Annealing ◽  
Intermediate Annealing ◽  
X Ray Diffraction ◽  
6016 Aluminum Alloy ◽  
Cold Rolled ◽  
Hot Rolled ◽  
Rolled Plates

The evolution of texture in AA6016 alloy during processing was systematically investigated. The hot-rolled 6016 plates were cold-rolled to 0.9mm through three different rolling processes. One was directly rolled to 0.9mm, the other two were rolled to 1.8mm and 2.3mm, respectively, followed by intermediate annealing at 360°C for 2h, and then rolled to 0.9mm. Finally, the three kinds of cold rolled plates were performed continuous annealing at 560oC. The textures and microstructures of each stage were characterized by the X-ray diffraction and electron back scattering diffraction (EBSD) techniques. The results show that the texture of hot-rolled sample is mainly composed of Brass, S and Copper; the relative amount and maximum density changed after 1st cold-rolling. After intermediate annealing, the Cube and Cube+ND20 texture replace the deformation texture and rise with the rolling reduction. Then the conducting of final cold rolling results in the decrease of Cube and Cube+ND20 component and increase of deformation texture. After the continuous annealing, R, Brass-R, Goss, Cube and Cube+ND20 components are observed. Particle stimulated nucleation (PSN) and nucleation at shear bands dominate the competition of recrystallization.

Effect of Warm-Rolling on the Formation of Microstructure and Microtexture of the Constituent Phases in a Duplex Steel

2014 ◽  
Vol 783-786 ◽  
pp. 2555-2560 ◽  
Author(s):  
Prasad Bhattacharjee Pinaki ◽  
Zaid Ahmed Mohammed
Keyword(s):  
Cold Rolling ◽  
Room Temperature ◽  
Volume Fraction ◽  
Warm Rolling ◽  
Pure Metal ◽  
Steel Plates ◽  
Duplex Steel ◽  
Cold Rolled ◽  
Evolution Of Microstructure ◽  
Microstructure And Microtexture

The effect of warm-rolling on the evolution of microstructure and microtexture was investigated in a duplex steel. For this purpose annealed duplex steel plates were cold and warm-rolled up to 90% reduction in thickness at room temperature and at 625°C, respectively. The austenite volume fraction decreased consistently during cold-rolling indicating that austenite was not stable during cold-rolling. In contrast, austenite was found to be very stable during warm-rolling at 625°C. Development of an ultrafine lamellar deformation structure with alternate arrangement of the ferrite and austenite bands could be observed during warm-rolling. A strong pure metal or copper type texture was observed in the austenite in the warm-rolled material in contrast to brass texture developed during cold-rolling. Development of RD (RD//<110>) fiber and ND-fiber (ND//<111>) was observed in ferrite during both cold and warm-rolling. However, the strength of the RD-fiber was much higher as compared to the ND-fiber in ferrite in cold-rolled DSS as compared to the ferrite in warm-rolled DSS.

Recrystallisation Behavior of Cold Rolled Zr702: Influence of Rolling Direction and Thickness Reduction

2007 ◽  
Vol 550 ◽  
pp. 459-464
Author(s):  
Francois Gerspach ◽  
Nathalie Bozzolo ◽  
Francis Wagner
Keyword(s):  
Cold Rolling ◽  
Rolling Direction ◽  
Zirconium Alloys ◽  
Nuclear Industry ◽  
Thickness Reduction ◽  
Crystal Anisotropy ◽  
Precise Knowledge ◽  
Texture Change ◽  
Great Relevance ◽  
Cold Rolled

Zirconium alloys are widely used for different applications in nuclear industry. Precise knowledge of their texture is of great relevance since this hcp metal exhibits a strong crystal anisotropy. Despite that, the mechanisms of texture change during its deformation and subsequent annealing are still not precisely known. Thus, there is a need for a better understanding of the fundamental mechanisms of recrystallisation. Earlier works on Zr702 [1-3] suggested that the kinetics and local mechanisms of recrystallisation after cold-rolling was controlled by the heterogeneity of the deformed microstructure and that, at the end of recrystallisation (corresponding to the disappearance of the deformed matrix), the position of the major texture components remained almost unaffected. The aim of the present work is to confirm whether these statements can be generalized for various deformation conditions or not.

scholarly journals Evolution of Microstructure, Texture and Topography during Cold Rolling and Recrystallization of Ni–5at.%W Alloy Substrate for Coated Conductors

Crystals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 604
Author(s):  
Chenxi Zhang ◽  
Hongli Suo ◽  
Zili Zhang ◽  
Qiuliang Wang ◽  
Yingxia Wang ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Direction ◽  
Large Angle ◽  
Cube Texture ◽  
Deformation Texture ◽  
Coated Conductors ◽  
Recrystallization Process ◽  
Alloy Substrate ◽  
Rolling Orientation ◽  
Cold Rolled

In this work, the effect of cold rolling and heat treatment upon the microstructure and texture of the surface layer and cross-section of Ni5W alloy substrate was analyzed via the EBSD technique. A typical copper deformation texture was shown by the cold-rolled Ni5W alloy substrate. The cube-oriented nuclei were attributed to the rolling direction–transverse direction (RD-TD) plane due to the presence of copper and S rolling textures. Typical large-shape cold-rolled microstructure was presented by the RD-ND surface in the cube-oriented area. During the recrystallization process, the cube-oriented grains did not have a nucleation quantity advantage, but they did have an obvious growth advantage compared with other orientation grains. They can form a strong cube texture by absorbing the random orientation and rolling orientation through the migration of large-angle grain boundaries.

Effect of Cold Rolling on the Mechanical Properties of Spray Cast Al-6Si-20Pb Alloy

2012 ◽  
Vol 585 ◽  
pp. 402-406 ◽  
Author(s):  
Rashmi Mittal ◽  
Devendra Singh
Keyword(s):  
Mechanical Properties ◽  
Cold Rolling ◽  
Thickness Reduction ◽  
Cold Rolled ◽  
Microstructural Studies

Porosity, hardness and microstructural studies of cold rolled spray cast Al-6Si-20Pb alloy for different percentage of thickness reduction were conducted from top to bottom and from centre to periphery of the deposit. Porosity was found to decrease and hardness was found to increase with the increase in percentage of thickness reduction. Aluminum grains were observed to become coarser with the increase in percentage of thickness reduction.

Effect of TRIP on the Damping Capacity and Strength in Fe-Al-Mn Alloy

2007 ◽  
Vol 345-346 ◽  
pp. 753-756
Author(s):  
Chang Yong Kang ◽  
Don Wook Son ◽  
Jang Hyun Sung ◽  
Ki Woo Nam
Keyword(s):  
Tensile Strength ◽  
Cold Rolling ◽  
Volume Fraction ◽  
High Strength ◽  
Damping Capacity ◽  
New Materials ◽  
Maximum Value ◽  
Ε Martensite ◽  
Cold Rolled

The damping capacity and strength of Fe-6Al-25/34Mn alloys have been studied for the development of new materials with high strength and damping capacity. Particularly, the effect of α’(including α) and ε martensite phases, which constitute the microstructure of cold rolled Fe-Al-Mn alloys, has been investigated in terms of the strength and damping capacity of the alloys. The damping capacity rises with increasing the degree of cold rolling and reveals the maximum value at 32% reduction. The damping capacity is strongly affected by the volume fraction of ε martensite. The phases such as α’ and austenite(γ) on damping capacity. Considering that tensile strength increases and elongation decreases with increasing the volume fraction of α’-martensite, it is proved that tensile strength is mainly affected by the amount of α’martensite.

Sign in / Sign up

Export Citation Format

Share Document