Effects of Retrogression Treatment Process on the Mechanical Properties and Corrosion Behavior of the Graphene/7075 Aluminum Matrix Composite

2020 ◽  
Vol 993 ◽  
pp. 747-755
Author(s):  
Bing Hui Ren ◽  
Kang Wang ◽  
Ran Wang ◽  
Jin Feng Leng
Keyword(s):  
Electrical Conductivity ◽  
Corrosion Behavior ◽  
Matrix Composite ◽  
Pitting Corrosion ◽  
Aluminum Matrix ◽  
Corrosion Current ◽  
Aluminum Matrix Composite ◽  
Pitting Potential ◽  
Time To Peak ◽  
Peak Aging

The influence of various retrogression and re-ageing (RRA) treatment processes on the hardness, electrical conductivity and corrosion behavior of graphene/7075 aluminum matrix composite were investigated. The results showed that the hardness decreased swiftly at the initial stage and short time to peak value as the retrogression temperature (170 °C, 180 °C, 190 °C, 200 °C) rises. In the RRA 180 °C/120 min process, the electrical conductivity and peak-aging Brinell hardness were 37.9%IACS, 192.8. This RRA treatment possessed excellent pitting corrosion resistance, and the corresponding pitting potential (Epit), the passivation potential (Epit-Ecorr), the pitting corrosion current density (Logicorr) were -0.756V, 0.558V, -1.836A/cm2, respectively. This enhance can attribute that the continuous η phase distributed along the grain boundary became intermittent and coarse in the retrogression stage.

scholarly journals Graphene reinforced aluminum matrix composite obtaining by powder metallurgy

2019 ◽  
Vol 16 (2) ◽  
pp. 18-24
Author(s):  
Sergio Esteban Bolaños-Bernal ◽  
Irma Angarita-Moncaleano
Keyword(s):  
Electrical Conductivity ◽  
Composite Material ◽  
Powder Metallurgy ◽  
Matrix Composite ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Optimal Time ◽  
Aluminium Matrix Composite ◽  
Powder Morphology ◽  
Time Required

Several researchers have reported graphene as an ideal reinforcement for composite materials due to its interesting properties [1]. The graphene-reinforced aluminium matrix composite material was obtaining by powder metallurgy. This study investigated the effect of aluminum powder morphology on compaction capacity and mechanical strength of composite material. Different milling times were used to determine the optimal time required in manufacturing. The proper compaction load was determined change its values and analyzing the effect of the different loads on the characteristics of the composite. Sintering parameters were established according to previous studies employed by other researchers. Finally, it is determined that with 0.5% wt graphene presents phenomena of grain refinement and higher electrical conductivity of the compound with respect to powder metallurgical aluminum.

Macro-Micro Relationship of Dimensional Changing Behavior of Aluminum Matrix Composite

2020 ◽  
Author(s):  
Deng Gong ◽  
Longtao Jiang ◽  
Youfang Cao ◽  
Yuanzi Zhou ◽  
Tingting Guo ◽  
...  
Keyword(s):  
Matrix Composite ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Relationship Of

Nanocarbon in the Structure of a Hypereutectic Aluminum-Matrix Composite

2020 ◽  
Vol 14 (4) ◽  
pp. 668-672 ◽  
Author(s):  
A. S. Aronin ◽  
I. M. Aristova ◽  
G. E. Abrosimova ◽  
V. V. Vasenev ◽  
V. N. Mironenko
Keyword(s):  
Matrix Composite ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite

High strength particulate aluminum matrix composite design: Synergistic strengthening strategy

2021 ◽  
Vol 25 ◽  
pp. 100697
Author(s):  
Chenwei Shao ◽  
Calvin Lo ◽  
Kapil Bhagavathula ◽  
André McDonald ◽  
James Hogan
Keyword(s):  
Matrix Composite ◽  
Aluminum Matrix ◽  
High Strength ◽  
Aluminum Matrix Composite
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