Grain size effect on tensile deformation behaviors of pure aluminum

Wang, B.B.; Xie, Guobo; Wu, L.H.; Xue, P.; Ni, D.R.; Xiao, B.L.; Liu, Y.D.; Ma, Z.Y.

doi:10.1016/j.msea.2021.141504

Cited by 47 publications

(6 citation statements)

References 56 publications

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“…The ultimate compressive strength (CUS) value of the modified alloy reached 510 MPa at room temperature. These results are in agreement with (Kurt et al, 2015;Wang et al, 2021), which attributed to the refining effect of the TiB. As shown in Figures 13B, the CUS of this modified alloy had a greater value than that of the conventional A242 alloys used in manufacturing automobile component parts.…”

Section: Mechanical Propertiessupporting

confidence: 87%

The influence of the modifying elements on the microstructure, mechanical, and deformation properties of aluminum alloys

et al. 2022

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In the current work, the standard A242 aluminum cast alloy is modified using the stir casting method with titanium (Ti) (0.5% wt.) and boron (B) (0.1% wt.) modifiers. Polarized optical and scanning electron microscopy were utilized to examine the A242 base microstructure, and A242 + TiB modified alloys; the results revealed that the modified A242 + TiB alloy was refined by 13.5 times more than the as-cast alloy. The mechanical properties were investigated experimentally using compression test in addition to the hardness test; the results revealed that the ultimate compressive strength of the A242 + TiB modified alloy was increased by 9.0% more than those of the A242 standard alloy. Moreover, the yield stress was enhanced by 40% at room temperature and 20% at 250 °C. The dynamic properties were studied using a free vibration impact test to study the modifiers’ effect on the dynamic behavior. The grain refinement notably impacted the damping capacity; due to the as-cast inhomogeneity, the conventional alloy A242 exhibited a greater FRF than the modified alloy A242 + TiB. The modified alloy displayed fewer resonance peaks due to grain refinement and excellent intermetallic phase distribution. The simulation process of the investigated alloys was performed using ABAQUS finite element software to predict the deformation behavior under different temperatures. The FE results showed that the modified alloy was more resistant to deformation by 9.1% than the reference alloy, A242, at room temperature and 7.6% at 250 °C, which agreed with the experimental findings.

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Section: Mechanical Propertiessupporting

confidence: 87%

The influence of the modifying elements on the microstructure, mechanical, and deformation properties of aluminum alloys

et al. 2022

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“…The strengthening mechanisms of titanium alloys can be broadly categorized into: solution strengthening, second-phase strengthening, α-phase lattice strengthening, finegrain strengthening, texture strengthening, etc. [36,37]. As mentioned above, in this study, the factors that led to changes in the mechanical properties of the alloy mainly include the initial dislocation density, the size effect of αs, and nano-β.…”

Section: Effect Of Microstructure Evolution On Mechanical Propertiesmentioning

confidence: 79%

Revealing the Effect of α’ Decomposition on Microstructure Evolution and Mechanical Properties in Ti80 Alloy

Xiao,

Hu,

et al. 2024

Materials

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Three types of solution treatment and aging were designed to reveal the α’ decomposition and its effect on the mechanical properties of near-α Ti-80 alloy, as follows: solution at 970 °C then quenching (ST), ST + aging at 600 °C for 5 h (STA-1), and ST + aging 600 °C for 24 h (STA-2). The results show that the microstructures of the ST samples were mainly composed of equiaxed αp and acicular α’, with a large number of dislocations confirmed by the KAM results. After subsequent aging for 5 h, α’ decomposed into acicular fine αs and nano-β (intergranular β, intragranular β) in the STA-1 specimen, which obstructed dislocation motion during deformation, resulting in the STA-1 specimen exhibiting the most excellent yield strength (1012 MPa) and maintaining sufficient elongation (8.1%) compared with the ST (898 MPa) and STA-2 (871 MPa) samples. By further extending the aging time to 24 h, the size of acicular αs and nano-β gradually increased while the density of dislocations decreased, which resulted in a decrease in strength and an increase in plasticity. Based on this, a microstructures–properties correlation model was proposed. This study provides a new method for strength–plasticity matching of near-α titanium alloys through α’ decomposition to acicular αs+nano-β.

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“…On the other hand, the mentioned two changed parameters have an effect on the A in TD and Ea values. The decrease in hot rolling temperature helped by producing the average of the smaller crystal grains, but at the same time, the increase in the share of deformed and substructured grains has the greater influence on the reduction in A values in TD [28,29]. The decrease in recrystallized grains with the smaller HRB final thickness also has a contribution to the higher anisotropy shown by Ea values [30].…”

Section: Discussionmentioning

confidence: 99%

Effects of Variated Final Temperature and Workpiece Thickness for Hot Rolling of Aluminum Alloy EN AW-8011

Kraner

Cvahte

Šuštarič

et al. 2023

Metals

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Hot rolling in the process chain of aluminum-rolled products presents the critical element of material quality and influences productivity. To increase the letter demand modifications of hot rolling, the consequential changes of microstructure, crystallographic texture, and mechanical and formability properties must be acknowledged and consistently considered when planning the rolling process and rolled product. Achieving lower thicknesses of the hot-rolled band would enable fewer passes with cold rolling; consequently, hot rolling with the same number of passes can be completed with lower temperatures. Microstructural and texture characterizations conducted using the light microscope and scanning electron microscope, respectively, of the 3.25 mm hot-rolled band revealed that the smaller grains appeared in the center of the cross-section, unlike for the 6 mm hot-rolled band, where smaller grains were detected on the top and bottom positions of the cross-section. Furthermore, the comparison also shows that the 6 mm hot-rolled band had 64% of random texture components and 83% of recrystallized grains, whereas the proportional adjustment for the 3.25 mm hot-rolled band had 42% of random texture components and 55% of recrystallized grains. For the mechanical testing results, the elongation values in rolling and transverse directions significantly differ only in the case of a hot-rolled band of 3.25 mm. Consequently, the earing results are more than 1.5% higher for the 3.25 mm hot-rolled band, than the 6 mm hot-rolled band.

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Grain size effect on tensile deformation behaviors of pure aluminum

Cited by 47 publications

References 56 publications

The influence of the modifying elements on the microstructure, mechanical, and deformation properties of aluminum alloys

The influence of the modifying elements on the microstructure, mechanical, and deformation properties of aluminum alloys

Revealing the Effect of α’ Decomposition on Microstructure Evolution and Mechanical Properties in Ti80 Alloy

Effects of Variated Final Temperature and Workpiece Thickness for Hot Rolling of Aluminum Alloy EN AW-8011

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