scholarly journals Mechanical Properties and Textures of Particulatereinforced Aluminum Alloy Matrix Composite Under Hot- and Cold-Rolling Conditions

1998 ◽  
Vol 31 (1-2) ◽  
pp. 43-52 ◽  
Author(s):  
L. Q. Chen ◽  
Y. X. Lü ◽  
C. S. Lee ◽  
J. Bi ◽  
R. K. Y. Li
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Cold Rolling ◽  
Rolling Texture ◽  
Rolled Sheet ◽  
Alloy Matrix ◽  
Cold Rolled ◽  
Aluminum Alloy Matrix ◽  
Hot And Cold Rolling ◽  
Hot Rolled

A study has been made on the mechanical properties of an aluminum alloy matrix (Al–3.0wt% Cu–1.5 wt% Mg–0.4wt% Mn)composites reinforced with a volume fraction of 15% silicon carbide under hot- and cold-rolling conditions. The preferred crystallite orientation distribution functions (ODFs) of these rolled sheets were measured. The tensile test results showed that the ultimate tensile strength and plasticity of the hot-rolled composite sheet are better than those of the cold-rolled one. However, the cold-rolled sheet specimen exhibits much higher 0.2% offset yield strength than that in the case of hot rolling. The cold-rolling texture of this sheet composite is obtained from the development of hot-rolled texture only by a little rotation about the related axes. It consists of random texture and three weak components, {001}〈110〉, {110}〈112〉 and {3314}〈773〉, while the hot rolling texture of the metal-matrix composite (MMC) sheet is almost random under the rolling reduction employed. The preferred grain orientation has effect on the yield strength and no much influence on the ultimate tensile strength of the cold rolled sheet. The decrease in the ultimate tensile strength of the cold-rolled specimen is mainly attributed to the micro-damages in the microstructure produced during cold rolling.

Effect of Hot-Rolled Microstructure on the Recrystallization Texture of Cold-Rolled Non-Oriented Electrical Steel

2011 ◽  
Vol 298 ◽  
pp. 203-208 ◽  
Author(s):  
Zi Li Jin ◽  
Wei Li ◽  
Yi Ming Li
Keyword(s):  
Cold Rolling ◽  
Electrical Steel ◽  
Texture Evolution ◽  
Steel Strip ◽  
Silicon Steel ◽  
Grain Structure ◽  
Recrystallization Annealing ◽  
Rolled Sheet ◽  
Cold Rolled ◽  
Hot Rolled

With the help of orientation distribution function (ODF) analysis, experiments of different hot band grain microstructure 0.33% silicon steel were cold-rolled and annealed in the laboratory，to study the effect of the microstructure hot-rolled steel strip for cold rolled non-oriented silicon steel microstructure and texture of recrystallization annealing. The results show that hot rolled microstructure on cold rolled Non-Oriented Electrical Steel cold-rolled sheet evolution of texture and recrystallization have important influence, the quiaxed grain structure of steel by cold rolling and recrystallization annealing, the recrystallization speed than the fiber grain-based mixed crystals recrystallization fast , With the equiaxed grains made of cold rolled silicon steel after annealing the {110}<UVW> texture components was enhanced and {100}<uwv> texture components weakened. Different microstructure condition prior to cold rolling in the recrystallization annealing process the texture evolution has the obvious difference, the equiaxial grain steel belt cold rolling and annealing, has the strong crystal orientation. This shows that the equiaxed grain when hot microstructure is detrimental to the magnetic properties of cold-rolled non-oriented silicon steel to improve and increase.

Recrystallization Annealing of Cold Rolled 9Cr 1Mo Ferritic Steel Containing Silicon

2009 ◽  
Vol 282 ◽  
pp. 9-16
Author(s):  
M.N. Mungole ◽  
M. Surender ◽  
R. Balasubramaniam ◽  
S. Bhargava
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Cold Rolling ◽  
Grain Growth ◽  
Ferritic Steel ◽  
Annealing Temperature ◽  
Recrystallization Annealing ◽  
Cold Rolled

9Cr-1Mo ferritic steel samples containing 0.2 and 0.5 wt % silicon in 40 % cold rolled state were recrystallize-annealed at 1100, 1200 and 1300 K. The grain growth and mechanical properties after recrystallization-annealing for 20 hr to 100 hr were investigated. No significant grain growth was observed even after 100 hr annealing at 1100 and 1200 K. The recrystallization-annealing at 1200 K resulted grains smaller in size than those at 1100 K. Annealing at 1300 K exhibited the enhanced grain growth with decorative microstructures. Initial annealing after cold rolling at 1100 K exhibited low hardness which further increased with annealing temperature. Annealing at 1100 K for 20 hrs exhibited low yield strength and ultimate tensile strength compared to those of as received samples. However, for 100 hrs annealing these properties remained nearly constant for 0.2 Si composition and increased marginally for 0.5 Si composition. Recrystallization-annealing exhibited improved ductility for both the compositions.

The Effect of Cold Rolling Direction on the Secondary Recrystallization in Fe-3%Si Steel

2011 ◽  
Vol 702-703 ◽  
pp. 591-594
Author(s):  
Kyung Jun Ko ◽  
Hyung Ki Park ◽  
Chan Hee Han
Keyword(s):  
Cold Rolling ◽  
Hot Rolling ◽  
Rotation Angle ◽  
Rolling Direction ◽  
Secondary Recrystallization ◽  
Rolled Sheet ◽  
Goss Texture ◽  
Cold Rolled ◽  
Hot Rolled ◽  
Similar Texture

In order to verify the origin of Goss nuclei for secondary recrystallization in Fe-3%Si steel, the effect of cold-rolling direction on the secondary recrystallization was examined in this study. The cold-rolling direction was rotated through 0 ~ 90 degrees about the hot-rolling direction on normal direction axis of hot-rolled sheet. In spite of the different initial texture before cold rolling, the 88% cold rolled texture was formed by similar α and γ fiber regardless of the rotation of cold rolling direction. Likewise, regardless of the cold rolling direction, the primary recrystallized sheets had a similar texture. In particular, the area fraction of Goss component (tolerance angle within 15º) in the primary recrystallized sheets was increased in the cold rolling condition of rotating through 60, 90 degrees from the hot rolling direction. After high temperature annealing at 1200°C, the secondary recrystallized grain was fully evolved in the all conditions. The sharpness of Goss texture in secondary recrystallized sheet was decreased as increasing the rotation angle of cold rolling direction.

Influence of Cold Rolling Reduction and Cross Rolling on Recrystallization Texture Formation in Electro Deposited Pure Iron with a Sharp and Homogeneous //ND Fiber

2014 ◽  
Vol 783-786 ◽  
pp. 313-318
Author(s):  
Naoki Yoshinaga ◽  
Dirk Vanderschueren ◽  
Leo Kestens ◽  
Kohsaku Ushioda ◽  
Natsuko Sugiura
Keyword(s):  
Cold Rolling ◽  
Pure Iron ◽  
Recrystallization Texture ◽  
Rolling Texture ◽  
Rolling Reduction ◽  
Rolled Sheet ◽  
Texture Formation ◽  
Annealing Texture ◽  
Cold Rolling Reduction ◽  
Cold Rolled

The cold rolling and annealing texture formation has been investigated in electro deposited pure iron which has an extremely sharp and isotropic <111>//ND fiber. Regardless of cold rolling reduction, {111}<112> intensified texture is formed after cold rolling. Similar texture remains after recrystallization in 65% cold rolled material while {111}<110> type texture forms in 80% and 90% cold rolled ones. The recrystallized grains at the stage of 5% recrystallization have {111}<112> orientation in 65% cold rolled sheet, whereas {111}<110> is observed in 80% cold rolled one. From this aspect, it is considered that the nucleation orientation plays an important role in the recrystallization texture formation. In the meanwhile, the growth of the recrystallized nuclei is also supposed to affect the recrystallization texture formation. The nuclei with {111}<112> orientation in lightly cold rolled sheet are easier to consume the deformed matrix than they do in heavily cold rolled sheets because their frequency to encounter a deformed grain with nearly the same orientation is much smaller in lightly cold rolled specimen, which can result in a large mobility for growth. Cross cold rolling makes cold rolling texture rather homogeneous <111>//ND fiber, which gives rise to an almost homogeneous <111>//ND fiber after annealing.

Effect of Rolling on Mechanical Properties and Fatigue Behavior of an Al-Mg-Sc-Zr Alloy

2014 ◽  
Vol 794-796 ◽  
pp. 331-336 ◽  
Author(s):  
Daria Zhemchuzhnikova ◽  
Rustam Kaibyshev
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fatigue Behavior ◽  
Cyclic Fatigue ◽  
Static Mechanical ◽  
Cold Rolled ◽  
Hot And Cold Rolling ◽  
Hot Rolled ◽  
Static Mechanical Properties ◽  
Zr Alloy

An aluminum alloy with a chemical composition of Al–6%Mg–0.35%Mn–0.2%Sc–0.08%Zr–0.07%Cr (in wt.) was rolled up to different reductions of 75, 88 and 95% at 360oC and at ambient temperature. The static mechanical properties and the high-cyclic fatigue (HCF) life were examined. It was shown that the hot rolling results in increased yield stress (YS) and ultimate tensile strength (UTS). However, ductility and fatigue limit of the hot rolled alloy and initial as-cast ingot are nearly the same. The combination of hot and cold rolling leads to significant improvement of tensile strength and fatigue resistance, while ductility tends to reduce with increasing the rolling reduction. The cold rolled alloy exhibits the endurance limit under fatigue conditions, while the alloy in the both as-cast and hot rolled conditions exhibits only fatigue strength. The effect of the deformation structure on the mechanical properties is discussed.

scholarly journals Microstructure and Mechanical Properties of the Cold-Rolled Mg-14Li-1Zn Alloy after Hot Rolling

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Qiang Wu ◽  
Kunning Fu ◽  
Ruizhi Wu ◽  
Jinghuai Zhang ◽  
Legan Hou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cold Rolling ◽  
Hot Rolling ◽  
Rolling Temperature ◽  
Homogeneous Microstructure ◽  
Microstructure And Mechanical Properties ◽  
Different Temperatures ◽  
Cold Rolled ◽  
Hot Rolled

The as-cast Mg-14Li-1Zn alloy was hot rolled at different temperatures with the reduction of 50%, followed by cold rolling with the reduction of 80%. The effects of the hot rolling temperature on the microstructure and mechanical properties of the final specimens were investigated. The results show that the higher rolling temperature brings about a more homogeneous microstructure, which is favorable for the subsequent cold rolling. When the hot rolling temperature is 300°C, the final specimen possesses the highest tensile strength and hardness of 238 MPa and 67.7 HV, respectively. When the hot rolling temperature is 200°C, the final specimen possesses the highest elongation of 24.6%.

scholarly journals STUDY OF THE EFFECT OF TiB2 PARTICLES ON THE STRUCTURE, DEFORMATION BEHAVIOR, AND PROPERTIES OF THE ALUMINUM ALLOY 1550

2020 ◽  
pp. 102-116
Author(s):  
Aleksandr B. VOROZHTSOV ◽  
◽  
Vladimir V. PLATOV ◽  
Aleksandr A. KOZULIN ◽  
Anton P. KHRUSTALEV ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Relative Elongation ◽  
Rolling Direction ◽  
Strength Properties ◽  
Rolled Sheet ◽  
Master Alloys ◽  
Cast Alloys ◽  
Tib2 Particles

In this work, the special master alloys containing aluminum and TiB2 powder with bimodal particle size distribution in three mixture compositions are prepared. The master alloys are infused into the melts using an external ultrasound source. The castings with particles had smaller grain sizes than the initial castings without particles. It is found that the hardness, yield strength, and ultimate tensile strength reach higher values with an increase in the relative elongation of the cast alloys with added particles. A warm rolling mode is employed for the studied alloys to obtain sheet blanks. It is shown that the staged shrinkage of the billets up to deformation of 80 % with periodic heating up to 300 °C allows one to obtain defect-free sheet products. The structure of the rolled sheet-alloys is characterized by the plate-shaped grains elongated along the rolling direction with pockets of submicron-sized grains in between. The strength properties of the studied rolled alloys exceeded those of the cast alloys. In the case of the rolled alloys, an increase in the yield strength, ultimate tensile strength, and ductility is revealed for the alloys with particles as compared to the ones with no particles added.

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.

Effects of Solubility Limit and the Presence of Ultra-Fine Al6Fe on the Kinetics of Grain Growth in Dilute Al-Fe Alloys

2007 ◽  
Vol 550 ◽  
pp. 339-344 ◽  
Author(s):  
Shigeo Saimoto ◽  
Hai Ou Jin
Keyword(s):  
Grain Size ◽  
Cold Rolling ◽  
Grain Growth ◽  
Solubility Limit ◽  
Rolled Sheet ◽  
Migration Rates ◽  
Cold Rolled ◽  
Fe Alloys ◽  
Grain Growth Kinetics ◽  
Kinetics Of

A nominally pure Al slab was thermo-mechanically treated to result in a near random texture of 90 m grain size. Subsequent cold rolling with intermediate anneals at 230, 275, and 300°C reduced the Fe solute to near equilibrium compositions below 0.5 ppm atomic. The final cold rolled sheet continuously recrystallized; grain growth of this structure is reported. A grain-growth kinetics mapping was generated, correlating the parameters of Fe-in-Al solubility limit, Fe diffusivities in the grain boundaries and the Al lattice and the activation energies for migration rates.

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