Effect of Grain Modifier on Mechanical and Tribological Properties of Al-Si Alloy and Composite

Radhika, N.; Sasikumar, J.; Jojith, R.

doi:10.1007/s12633-020-00476-4

Cited by 11 publications

(8 citation statements)

References 44 publications

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“…The failure observed was trans-granular type and the fracture was mainly mixed-mode type (ductile-brittle). 32…”

Section: Resultsmentioning

confidence: 99%

“…The failure observed was trans-granular type and the fracture was mainly mixed-mode type (ductile-brittle). 32 The effect of applied load on the dry sliding linear reciprocating wear rate and COF of as-cast and heattreated FGC was studied by maintaining a sliding distance and frequency of 1500 m and 7 Hz respectively. Figure 8(a) and (b) depict the effect of increasing applied load on wear rate and COF.…”

Section: Microhardness Tensile and Reciprocating Wear Resultsmentioning

confidence: 99%

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Microstructure, mechanical properties and reciprocal dry sliding wear behaviour of as-cast and heat-treated TiN/Al-7Si functionally graded composite

Radhakrishnan

Radhika

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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This work explores the effect of T6 heat-treatment on the microstructure, mechanical properties and dry sliding linear reciprocating wear behaviour of Al-7Si/Titanium Nitride (TiN) centrifugally cast functionally graded composite. The 10 wt% TiN particle addition and subsequent eutectic Si spheroidisation due to heat treatment revealed an improvement in microhardness, tensile strength and wear resistance of heat-treated composite when compared to as-cast composite. Reciprocating wear analysis at varying applied loads and sliding distances revealed a combination of specimen micro-ploughing and abrasive particle action at low load and sliding distances, which was in stark contrast to the combination of abrasive and adhesive wear at higher loads and sliding distances. The surface was characterised by mechanically mixed layer formation due to tribo-oxidation, adhesive and delamination wear mechanisms. This composite can be utilised to replace traditional materials employed in reciprocating pump and compressor applications.

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“…The failure observed was trans-granular type and the fracture was mainly mixed-mode type (ductile-brittle). 32…”

Section: Resultsmentioning

confidence: 99%

Section: Microhardness Tensile and Reciprocating Wear Resultsmentioning

confidence: 99%

Microstructure, mechanical properties and reciprocal dry sliding wear behaviour of as-cast and heat-treated TiN/Al-7Si functionally graded composite

Radhakrishnan

Radhika

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…The Mitutoyo surface roughness tester is measured by the machined components' surface roughness [29][30][31]. The cutting force was measured by using of lathe tool dynamometer made by National instruments effectively; the machining parameters of this investigation are presented in Table 3.Wear test experiments under the influence of 3.0 kgf of applied, sliding velocity of 2 m/s, the sliding distance of 1500 m, and the wear track diameter of 120 mm [32][33][34]. The disc rotational speed is maintained at 160 rpm with a 4.…”

Section: Methodsmentioning

confidence: 99%

Study on Compaction and Machinability of Silicon Nitride (Si3N4) Reinforced Copper Alloy Composite through P/M Route

Sathish

Mohanavel

Karthick

et al. 2021

International Journal of Polymer Science

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Nowadays, most of the products are used in the electrical and electronics field, and copper alloy is playing a significant role such as Springs for relay contacts and switchgear, Rotor bars, and Busbars. In this work, the copper alloys consider as base alloy, and the reinforced factor of silicon nitride (Si3N4) is processed of reinforcement as 3 wt. %, 6 wt. %, 9 wt. %, 12 wt. % Si3N4 through powder metallurgy performance. The ball mill process is used for this work to obtain an enhanced homogeneous mixture of both base material as well as reinforced particles. Using a hydraulic press, the blended powders are compacted with applying 3 kN and 10 min period for obtained good strength of green compact specimens. Further, the green compacted specimens are sintered, and the sintered billets are machined in the conventional lathes with different cutting speeds 50 m/min, 100 m/min, and 150 m/min; feed rate of 0.1 mm/rev (fixed); and depth of cut of 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, and 1.6 mm. Cutting speed and depth of cut to find the composites’ cutting force is ingenious. A wear test also can be conducted to find the wear resistance of the reinforced particles of the copper alloy material.

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“…The addition of the WC brings a stronger and stiffer reinforcement into the matrix, hence enhancing the hardness. The presence of grain refining agent strontium along with the WC particles caused the dislocation punching phenomena at the matrix-reinforcement interface [37]. A significant 55% increase in hardness was observed in the developed composite when 9 wt% of WC along with 5 wt% of Sr was added.…”

Section: Hardness and Tensile Characteristicsmentioning

confidence: 99%

Evaluation of the effect of strontium and tungsten carbide on the microstructure evolution, tribological and mechanical behaviour of Al-Zn-Mg-Cu-5Sr-WC metal matrix composite

JOHNSON,

RAJA

2024

J Met Mater Miner

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The present study focused on the experimental investigation of the metallurgical, tribological, and mechanical behavior of the developed Al-Zn-Mg-Cu-Sr-WC (Al7075-Sr-WC) metal matrix composite. The effect of the reinforcements such as strontium and tungsten carbide (WC) along with a 2 wt% magnesium as the wetting agent during the stir casting of the synthesized aluminum metal matrix composite (MMC) was investigated by varying the weight percentages. The microstructure examination was characterized using field emission scanning electron microscopy (FE-SEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS) techniques. Wear analysis and mechanical testing were conducted to study the effect of WC particles in the matrix phase by examining their wear rate, tensile strength, proof strength, and hardness values. From the mechanical and tribological tests, it was observed that there was an increase of 55% in hardness and 43% in tensile strength, along with a 31% reduction in wear rate. The secondary phases revealed from XRD analysis lead to more hardness along the refined grain boundaries. The tensile strength of the composite initially increased with a 3 wt% of WC and 5 wt% strontium due to hindrance to the dislocation movement but decreased with more reinforcement particles caused by brittleness. The hard WC particles presence has reduced the wear rate significantly due to its resistance towards abrasive wear and lubricating effect. The unique combination of a grain refiner and a binder helped develop a novel composite with superior characteristics that could replace many aerospace components made up of Al7075 alloy.

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Effect of Grain Modifier on Mechanical and Tribological Properties of Al-Si Alloy and Composite

Cited by 11 publications

References 44 publications

Microstructure, mechanical properties and reciprocal dry sliding wear behaviour of as-cast and heat-treated TiN/Al-7Si functionally graded composite

Microstructure, mechanical properties and reciprocal dry sliding wear behaviour of as-cast and heat-treated TiN/Al-7Si functionally graded composite

Study on Compaction and Machinability of Silicon Nitride (Si3N4) Reinforced Copper Alloy Composite through P/M Route

Evaluation of the effect of strontium and tungsten carbide on the microstructure evolution, tribological and mechanical behaviour of Al-Zn-Mg-Cu-5Sr-WC metal matrix composite

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