Hot-Deformation Behavior and Microstructure Evolution of the Dual-Scale SiCp/A356 Composites Based on Optimal Hot-Processing Parameters

Song, Yahu; Wang, Aiqin; Ma, Douqin; Xie, Jingpei; Wang, Zhen; Liu, Pei

doi:10.3390/ma13122825

Cited by 3 publications

(3 citation statements)

References 38 publications

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“…To enhance the mechanical properties of composites, hot-working processing techniques, such as hot rolling [18], hot extrusion [19], and die forging, [20] can be employed. In recent years, extensive research has been conducted on the hot deformation behavior of composites, which has provided fundamental theoretical guidance for their hot working [21][22][23][24]. Generally, particles can stimulate nucleation on recrystallization, making the composites form a uniform and fine recrystallization microstructure during deformation [3,25].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Mechanisms of SiC Particle Reinforced Al-Zn-Mg-Cu Alloy Matrix Composites

Diao,

Fan,

Yang

et al. 2023

Materials

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A systematic and comprehensive analysis of the hot deformation and mechanisms of SiC particle-reinforced aluminum matrix composites is significant for optimizing the processing of the composites and obtaining the desired components. Based on this, related research on 11 vol% SiCp particle-reinforced 7050Al matrix composites was carried out. Hot compression experiments were carried out on the Gleeble-3500 thermal simulator to study the hot deformation behavior of composites at the temperature of 370–520 °C and strain rate of 0.001–10 s−1. The hyperbolic sine constitutive equation of the material was established, and the processing map was calculated. Combining the typical metallograph and misorientation angle distribution, the microstructure evolution mechanism of composites was analyzed, and the effect of particles on recrystallization behavior was investigated. Under certain process conditions, the dominant deformation mechanism of composites changed from dynamic recovery (DRV) to dynamic recrystallization (DRX), and the grain boundary sliding mechanism began to play a role. In addition, high temperature tensile and elongation at break were tested, and it was found that the dominant form of fracture failure changed from brittle fracture of the particles to ductile fracture of the matrix as the temperature increased.

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Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Mechanisms of SiC Particle Reinforced Al-Zn-Mg-Cu Alloy Matrix Composites

Diao,

Fan,

Yang

et al. 2023

Materials

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“…However, the composites reinforced by nano particles are difficult to be prepare since nano particles are easy to agglomerate, limiting their application scopes [8,9]. In this case, the addition of micron and nano particles simultaneously into AMCs helps to solve the problem of insufficient strength and toughness, which is of great significance to promote the development of lightweight and wear-resistant AMCs [10,11].…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution and strengthening mechanism of A356 composites reinforced with micron and nano SiCp

Song

Wang²,

Ma³

et al. 2022

Mater. Res. Express

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The single scale SiCp reinforcement has a limited effect on the comprehensive performance of the composite, which restricts the optimization and improvement of its comprehensive performance. In order to improve the material's strong plasticity, wear resistance, thermal expansion and other properties of the comprehensive requirements. The (micron and nano) dual-scale SiCp/A356 composites with different volume fractions were prepared using the combination of powder metallurgy and hot extrusion. The effects of different volume fractions of dual-scale SiCp (15, 20, 25, 30 vol.%) on the microstructure and mechanical properties of A356 composites were studied, and the strengthening mechanism of dual-scale SiCp/A356 composites was analyzed. The results show that with the increasing of dual-scale SiCp content, the distribution uniformity and mechanical properties of SiCp first increase and then decrease. When the content of dual-scale SiCp is 25%, the mechanical properties reach their maximum values, with the hardness, yield strength and tensile strength of 112.3 HBW, 228 MPa and 310 MPa, respectively. They are improved by 86.9%, 81.0%, 74.2% as compared with those of A356 alloy, respectively. The fracture modes of dual-scale SiCp/A356 composites are mainly Al matrix tearing and SiCp fracture. The main strengthening mechanism is Orowan strengthening, along with thermal mismatch strengthening, load transfer strengthening and fine grain strengthening.

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“…Many research works revealed that the effects of particulates on deformation behavior of PRAMCs were complex [ 5 ]. Firstly, particles can hinder the motion of dislocations and grain boundary sliding (GBS) during deformation, leading to the accumulation of high-density dislocations around particles.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Workability of In-Situ TiB2/7050Al Composites Fabricated by Powder Metallurgy

Zhu

Liu

et al. 2020

Materials

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Isothermal compression tests of in situ TiB2/7050Al composites fabricated by powder metallurgy were performed at 300–460 °C with the strain rate varying from 0.001 s−1 to 1 s−1. The Arrhenius constitutive equation and hot processing map of composites were established, presenting excellent hot workability with low activation energies and broad processing windows. Dramatic discontinuous/continuous dynamic recrystallization (DDRX/CDRX) and grain boundary sliding (GBS) take place in composites during deformation, depending on the Zener-Hollomon parameter (Z) values. It was found that initially uniform TiB2 particles and fine grain structures are beneficial to the DDRX, which is the major softening mechanism in composites at high Z values. With the Z value decreasing, dynamic recovery and CDRX around particles are enhanced, preventing the occurrence of DDRX. In addition, fine grain structures in composites are stable at elevated temperature thanks to the pinning of dense nanoparticles, which triggers the occurrence of GBS and ensures good workability at low Z values.

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Hot-Deformation Behavior and Microstructure Evolution of the Dual-Scale SiCp/A356 Composites Based on Optimal Hot-Processing Parameters

Cited by 3 publications

References 38 publications

Hot Deformation Behavior and Mechanisms of SiC Particle Reinforced Al-Zn-Mg-Cu Alloy Matrix Composites

Hot Deformation Behavior and Mechanisms of SiC Particle Reinforced Al-Zn-Mg-Cu Alloy Matrix Composites

Microstructure evolution and strengthening mechanism of A356 composites reinforced with micron and nano SiCp

Hot Deformation Behavior and Workability of In-Situ TiB2/7050Al Composites Fabricated by Powder Metallurgy

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