Simultaneously improving the tensile strength and ductility of the AlNp/ Al composites by the particle's hierarchical structure with bimodal distribution and nano-network

Lu, Fenghua; Nie, Jinfeng; Ma, Xia; Li, Yusheng; Jiang, Zhouwen; Zhang, Yong; Zhao, Yonghao; Liu, Xiangfa

doi:10.1016/j.msea.2019.138519

Cited by 22 publications

(3 citation statements)

References 27 publications

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“…It is noticeable that the AlN/Al nanocomposite with heterogeneous distributed AlN network has a superior elongation of 15% than that of the relatively homogenous distributed one ( Figure 5 ). The main reason is that the heterogeneous lamella structure forms in Al matrix discussed in our previous work [ 27 ]. The coarse elongated matrix grains in the particle-lean zones can supply larger space for dislocation accumulation and sliding during the plastic deformation, which is a key factor for the large ductility of the original sample for the heterogeneous structured composites.…”

Section: Discussionmentioning

confidence: 99%

Effect of Cold and Warm Rolling on the Particle Distribution and Tensile Properties of Heterogeneous Structured AlN/Al Nanocomposites

Song

Jin

et al. 2020

Materials

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Recently, heterogeneous structured metals have attracted extensive interest due to their exciting mechanical properties. In this work, an AlN/Al nanocomposite with heterogeneous distribution of AlN nanoparticles was successfully prepared by a liquid-solid reaction method combined with subsequent extrusion deformation, which behaves an excellent synergy of tensile strength and ductility. In order to further reveal the particle distribution evolution and the tensile property response during further deformation, a series of rolling treatments with different thickness reductions under room temperature and 300 °C was carried out. The results show that the yield strength and tensile strength of the composites increase significantly from 238 MPa, 312 MPa to 312 MPa, 360 MPa after 85% rolling reduction at 300 °C. While the elongation decreased from 15.5% to 9.8%. It is also noticed that the elongation and tensile strength of the nanocomposites increases simultaneously with increasing deformation. It is considered that the aluminum matrix strengthening effect accounts for the strength enhancement. The AlN spatial distribution in the matrix becomes more homogeneous gradually during the rolling, which is supposed to reduce the stress concentration between the particle and matrix and then promote the ductility increase.

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Section: Discussionmentioning

confidence: 99%

Effect of Cold and Warm Rolling on the Particle Distribution and Tensile Properties of Heterogeneous Structured AlN/Al Nanocomposites

Song

Jin

et al. 2020

Materials

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“…An UFG composite combining Al2O3 particles and an Al matrix was prepared at room temperature RS by Kunčická et al [60]. Lu et al [104] prepared a UFG AlNp/Al composite with a hierarchical microstructure using cold RS, and its UTS exceeded 410 MPa primarily due to a homogeneous distribution of nano-sized AlN precipitates. Similar conclusions for this type of material were drawn by Nie et al [105].…”

Section: Fcc Compositesmentioning

confidence: 99%

Structural Phenomena Introduced by Rotary Swaging: A Review

Kunčická

2024

Materials

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Rotary swaging is an industrially applicable intensive plastic deformation method. Due to its versatility, it is popular, especially in the automotive industry. Similar to the well-known methods of severe plastic deformation (SPD), rotary swaging imparts high shear strain into the swaged materials and thus introduces grain refinement down to a very fine, even ultra-fine, level. However, contrary to SPD methods, one of the primary characteristics of which is that they retain the shapes and dimensions of the processed sample, rotary swaging enables the imparting of required shapes and dimensions of workpieces (besides introducing structure refinement and the consequent enhancement of properties and performance). Therefore, under optimized conditions, swaging can be used to process workpieces of virtually any metallic material with theoretically any required dimensions. The main aim of this review is to present the principle of the rotary swaging method and its undeniable advantages. The focus is primarily on assessing its pros and cons by evaluating the imparted microstructures.

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“…Also, during deformation, GBs prevent dislocation movement due to the misorientation of adjacent grains. Higher misorientation causes resistance to movement [38,39]. In addition, UFG Al has a large GB relative to the grain size, resulting in greater resistance to movement and higher stress.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Strength and Toughness of Aluminum Laminated Composites through Hybrid Reinforcement Using Dispersion Engineering

2023

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In this work, we propose a hybrid approach to solve the challenge of balancing strength and ductility in aluminum (Al) matrix composites. While some elements of our approach have been used in previous studies, such as in situ synthesis and ex situ augmentation, our work is innovative as it combines these techniques with specialized equipment to achieve success. We synthesized nanoscale Al3BC particles in situ using ultra-fine particles by incorporating carbon nanotubes (CNTs) into elemental powder mixtures, followed by mechanical activation and annealing, to obtain granular (UFG) Al. The resulting in situ nanoscale Al3BC particles are uniformly dispersed within the UFG Al particles, resulting in improved strength and strain hardening. By innovating the unique combination of nanoscale Al3BC particles synthesized in situ in UFG Al, we enabled better integration with the matrix and a strong interface. This combination provides a balance of strength and flexibility, which represents a major breakthrough in the study of composites. (Al3BC, CNT)/UFG Al composites exhibit simultaneous increases in strength (394 MPa) and total elongation (19.7%), indicating increased strength and suggesting that there are promising strengthening effects of in situ/ex situ reinforcement that benefit from the uniform dispersion and the strong interface with the matrix. Potential applications include lightweight and high-strength components for use in aerospace and automotive industries, as well as structural materials for use in advanced mechanical systems that require both high strength and toughness.

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Simultaneously improving the tensile strength and ductility of the AlNp/ Al composites by the particle's hierarchical structure with bimodal distribution and nano-network

Cited by 22 publications

References 27 publications

Effect of Cold and Warm Rolling on the Particle Distribution and Tensile Properties of Heterogeneous Structured AlN/Al Nanocomposites

Effect of Cold and Warm Rolling on the Particle Distribution and Tensile Properties of Heterogeneous Structured AlN/Al Nanocomposites

Structural Phenomena Introduced by Rotary Swaging: A Review

Enhancing Strength and Toughness of Aluminum Laminated Composites through Hybrid Reinforcement Using Dispersion Engineering

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