An investigation on microstructure and mechanical behaviour of copper-nickel coated carbon fibre reinforced aluminium composites

Abstract

In the present investigation, mechanical, corrosion and fatigue characterization is performed on the fabricated aluminium metal matrix composite (AMMC), by reinforcing nickel (Ni) and copper (Cu) coated 4% carbon fibre (CF) in aluminium alloy (AA6026) matrix. With a view of enhancing the strength of the aluminium alloy, an optimal percentage (4 wt%) of CFs is reinforced; as CFs cannot be directly reinforced in the aluminium matrix due to poor wettability, CFs are coated with Ni and Cu using electroless plating technique for better wettability and bonding between reinforcement and matrix. Properties of the cast alloy and coated CF reinforced composite are compared and the composite with better properties is identified as 4% Cu coated CFs reinforced AMMC. When compared with as-cast alloy and Ni coated CF reinforced composite, the tensile strength of Cu coated CFs composite was higher by 15.36% and 2.55%. Similarly, micro-Vickers hardness was improved by 7.61% and 3.09%, impact strength by 19.61% and 3.39%, flexural strength by 87.50% and 15.38%. The corrosion rate (mils/year) was reduced with incorporation of 4% Cu coated CFs in AA6026 by 59.72% and 23.23% as compared with as-cast and Ni coated CF reinforced composition.

Influence of process parameters on the microstructure and mechanical properties of friction stir welds of AA2014 and AA6063 aluminium alloys using response surface methodology

“…For evaluating the mechanical behavior of the FSWed workpieces, tensile test and micro-Vickers hardness are evaluated as per ASTM guidelines. ASTM E8 guidelines are adopted for determining ultimate and yield strength and percentage elongation whereas the ASTM E92 standard is adopted for determining micro-Vickers hardness values (Gajalakshmi et al 2020). FIE make tensile test machine with a max loading capacity of 5 Ton with ±1% of the indicated load from 2% to 100% of load capacity with displacement resolution of 0.01 mm with precision AC Servo motor is used for measuring the tensile strength.…”

Characterization and strengthening mechanism of CNT/TiB2 particulates added AZ91D composites

“…of strength in tension of the cast NHMCs is done on specimens with a dimension of; 70 mm length, breadth of 15 mm and width of 5 mm, based on the E8 ASTM procedure [29]. The impact trial describes the material's performance to a load applied suddenly and the required energy to rupture the sample; the experiment follows the ASTM E23 criterion [30].…”

Adsorption mechanism of E‐glass fiber/Aluminum particles/MWCNT filled epoxy matrix polymer composite in electronic applications

“…1.5% by weight of MWCNT showed good mechanical properties compared to 0.5% by weight of MWCNT and without MWCNT (Allen et al, 2019;Sarkar et al, 2017). Gajalakshmi et al (2020) investigated the mechanical properties of the aluminum metal matrix composite reinforced nickel and copper-coated carbon fiber in an aluminum alloy matrix. Optimized ranges are identified for 4% Cu-reinforced aluminum metal matrix composite.…”