Tensile Deformation and Fracture Behavior of AA5052 Aluminum Alloy under Different Strain Rates

Zhu, Zhenyu; Zhang, Xingquan; Xie, Li; Huang, Zhenyi

doi:10.1007/s11665-021-06112-5

Cited by 9 publications

(2 citation statements)

References 23 publications

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“…In Figure 6e,f, as the particle size of B4C increases to 1 µm, the ductile fracture characteristics of the fracture morphology are more obvious. The presence of distinct tearing crests and an increase in both the depth and quantity of dimples suggest a heightened plastic deformation ability for the composites [38,39]. As the particle size of B4C increases to 10 µm, the fracture morphology of the composites exhibits distinct ductile fracture characteristics, as illustrated in Figure 6g,h.…”

Section: 𝑚 − 𝑚mentioning

confidence: 95%

Influence of B4C Particle Size on the Microstructure and Mechanical Properties of B4C/Al Composites Fabricated by Pressureless Infiltration

Liu

Peng

Wei

et al. 2023

Metals

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To investigate the effect of B4C particle size on the microstructure and mechanical properties of B4C/Al composites, and to provide theoretical guidance for the subsequent thermal processing of composites, B4C/Al composites with varying B4C particle sizes (0.2 µm, 0.5 µm, 1 µm, 10 µm) were fabricated using pressureless infiltration. The microstructure of the composites was characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM), while the mechanical properties were analyzed by hardness test, three-point bending and high temperature compression. The results indicated that Al3BC and AlB2 were the primary interfacial reaction products in B4C/Al composites, and interface reaction could be alleviated with increasing particle size. B4C/Al composites with larger B4C particle sizes exhibited a relatively uniform and discrete distribution of B4C, while those with smaller B4C particle sizes showed agglomeration of B4C. The Vickers hardness and peak flow stress of B4C/Al composites gradually decreased with the increase of B4C particle size, while the bending strength, flexural modulus, and fracture toughness tended to increase. In addition, when B4C particle size was 10 µm, the composites displayed optimal comprehensive performance with the lowest peak flow stress (150 MPa) and the highest fracture toughness (12.75 MPa·m1/2).

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Section: 𝑚 − 𝑚mentioning

confidence: 95%

Influence of B4C Particle Size on the Microstructure and Mechanical Properties of B4C/Al Composites Fabricated by Pressureless Infiltration

Liu

Peng

Wei

et al. 2023

Metals

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“…It can be seen that the dislocation density is low and the dislocation cells are large under the quasi-static condition in Figure 6a, and a higher dislocation density and smaller dislocation cells are observed under the highstrain-rate condition in Figure 6c. At high strain rates, the atomic diffusion rate is accelerated and the grain boundary diffusion and migration ability are enhanced, so multiple dislocation slip systems are activated and dislocations from different slip systems cross each other, thus forming many dislocation cell structures, which can improve the plasticity of the material [27]. Therefore, a high strain rate leads to a high dislocation density, The strain-rate sensitivity exponent (m) indicates the sensitivity of flow stress to the strain rate during the plastic deformation of a material.…”

Section: Tem Analysismentioning

confidence: 99%

Study on the Flow Behavior of 5052 Aluminum Alloy over a Wide Strain-Rate Range with a Constitutive Model Based on the Arrhenius Model Extension

Ma,

Wang,

Huang

et al. 2023

Metals

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The formability at room temperature and low speed limits the application of aluminum alloy, while high strain rates positively improve the formability of materials. The constitutive behaviors of materials under high strain rates or impact loadings are significantly different from those under quasi-static conditions, while few constitutive models consider the effect of the mobile dislocation and forest dislocation evolution on the dynamic strain aging (DSA) over a wide strain-rate range. The 5052 aluminum alloy, of which the primary source of strain-hardening is dislocation–dislocation interaction, is widely used in manufacturing automotive covering parts and is considered one of the most promising alloys. Therefore, this study conducts uniaxial tensile tests on AA5052-O under conditions of temperatures ranging from 293 K to 473 K and strain rates ranging from 0.001 s−1 to 3000 s−1, and compares the stress–strain relationships of AA5052-O under different conditions to illustrate the constitutive relationship affected by the dislocation evolution over a wide strain-rate range. The Arrhenius model based on the thermal activation mechanism is modified and extended by considering the effects of dynamic strain aging (DSA), drag stress, and the evolution of mobile dislocation and forest dislocation. Thus, a new physics-based constitutive model for AA5052-O is proposed, which can well reflect the change in strain-rate sensitivity with the strain rate increasing. The mobile dislocation density and total dislocation density are predicted with a modified Kubin–Estrin (KE) model, and the influences of variable mobile dislocation on DSA and dislocation drag are discussed as well. In order to verify the reliability of the new constitutive model, the dislocation densities of the specimens before and after deformation are obtained with TEM and XRD, which are in good agreement with the predicted values. This study also compares the newly proposed model with classic constitutive models using multiple statistical evaluation methods, which shows that the new physics-based constitutive model has not only more clear physical meanings for its parameters but also has a higher prediction accuracy.

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Numerical prediction and experimental validation of forming limit curves of laminated half-hard aluminum sheets

Bouziane,

EL Mrabti,

Touache

et al. 2024

Int J Adv Manuf Technol

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Tensile Deformation and Fracture Behavior of AA5052 Aluminum Alloy under Different Strain Rates

Cited by 9 publications

References 23 publications

Influence of B4C Particle Size on the Microstructure and Mechanical Properties of B4C/Al Composites Fabricated by Pressureless Infiltration

Influence of B4C Particle Size on the Microstructure and Mechanical Properties of B4C/Al Composites Fabricated by Pressureless Infiltration

Study on the Flow Behavior of 5052 Aluminum Alloy over a Wide Strain-Rate Range with a Constitutive Model Based on the Arrhenius Model Extension

Numerical prediction and experimental validation of forming limit curves of laminated half-hard aluminum sheets

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