Precipitation behavior and mechanical properties of Al-Zn-Mg-Cu matrix nanocomposites: Effects of SiC nanoparticles addition and heat treatment

Li, Jingjing; Ju, Jiang; Zhang, Zhen; Zhou, Yang; Luo, Yifei; Mudi, Kunqi; Xie, Yuehuang; Wang, Mengmeng; Liang, Jiamiao

doi:10.1016/j.matchar.2020.110827

Cited by 18 publications

(1 citation statement)

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“…In order to further analyze and validate the mechanisms of enhanced strengths with DCT samples than the CHT samples, a quantified calculation of the yield strength of the composite material is performed in this section. It is widely known that, during ageing of aluminum alloys, the main strengthening contribution comes from the development of second phases, in which the uniformly distributed intragranular precipitates play the key roles in strengthening, while the coarse and heterogeneous precipitates in grain boundaries play a minor role [34]. Hence, only the uniformly distributed needle-shaped θ' precipitates are utilized for the strengthening analysis and calculations in this section.…”

Section: Relationship Between Microstructures and Strengthmentioning

confidence: 99%

Effect of Deep Cryogenic Treatment on the Artificial Ageing Behavior of SiCp–AA2009 Composite

Wang

Chen

Liu

et al. 2022

Metals

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The effect of deep cryogenic treatment (DCT) on the artificial ageing kinetics of a SiC particles reinforced aluminum alloy composite (SiCp-Al) is experimentally studied in this paper. The evolutions of both macro-properties (i.e., yield strength and ultimate tensile strength) and microstructures (precipitates) have been investigated by a set of hardness tests, tensile tests, and microstructural observations (scanning electron microscope, SEM and transmission electron microscope, TEM) for a SiCp-Al composite material with conventional heat treatment (solution heat treatment + quenching + artificial ageing, CHT) or DCT (solution heat treatment + quenching + deep cryogenic + artificial ageing). The results show that SiCp could significantly accelerate the ageing kinetics of the composites. Meanwhile, compared with CHT conditions, DCT can further improve the yield strength (YS) and ultimate tensile strength (UTS) of the composite materials after artificial ageing. The microstructures show that DCT induces the generation of more thinner θ’ precipitates homogeneously distributed in the grains during artificial ageing compared with corresponding CHT conditions. A quantified analysis has been performed based on the microstructural data, and the calculated results further support the indication that the strengthening effect in DCT compared with CHT is mainly contributed by corresponding precipitation behavior.

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Section: Relationship Between Microstructures and Strengthmentioning

confidence: 99%