Influence of rice husk ash and B4C on mechanical properties of ADC 12 alloy hybrid composites

In-Situ Reinforcement of AA6063/Al2O3 Hybrid Composite: Comparative Wear and Hardness Evaluation of Manihot Esculenta and Green Plantago major Particulates

“…AMCs reinforced with agro waste particulates have equally demonstrated enhanced hardness with increasing percent weight variation as reported for RHA/SiC [32], RHA/B 4 C [33], RHA/Cu [13], CSA/Al 2 O 3 [18], CSA [34], BPA [26], and DPSA with an optimum increase at 7.5 wt.% [22]. In contrast, a decrease in hardness has also been reported for AMCs with increasing weight ratio variations in NCRs/SCRs such as RHA/Al 2 O 3 with about 10% decrease reported [9], CCA/SiC [21], BLA/Al 2 O 3 with about 9% reduction for a 40% Al 2 O 3 reduction [35], and GSA/SiC [27].…”

“…Increasing the stirring time and speed in the double-step stir cast method has also been reported to signi cantly in uence the hardness property of the AMC [7]. Commonly investigated Al alloys reinforced singly with either SCRs or NCRs or a hybrid of SCR-NCRs include AA2014 [38], A356 [39], LM13 [40], AA5083 [41], AA7075 [42], Al6061 [14,18], AA2009 [26], ADC12 [33], and AA6063 [6,41]. Studies involving the use of AA6063 have employed fabrication routes like ballistic impact [41] and the compo-casting method [6], with limited information on the use of a double stir-cast route, particularly for SCR-NCR hybrid reinforcement.…”

Agro waste reinforcement of metal matrix composites, a veritable sustainable engineering achievement, or an effort in futility? A critical review

“…Table 3 presents a list of metals commonly used as matrices for MMCs, with aluminum being the most researched [122][123][124][125]. Various grades of aluminum, including AA2014 [126], LM13 [127], AA5083 [128], AA2009 [60], AA7075 [129], AA6061 [62,70], ADC12 [68], A356 [130], and AA6063 [128,131], have been investigated. Other metals such as titanium, copper, magnesium, and zinc are also utilized.…”

“…There has been a growing interest in research focused on HMMCs utilizing agro wastes as natural and synthetic reinforcements [39,66,68,130,180]. Table 7 summarizes some studies conducted using agro waste and synthetic reinforcement materials.…”

“…For instance, Bodunrin et al [152] argued that MMCs reinforced with AWs- based NRs tend to exhibit inferior properties compared to SRs, citing studies by Alaneme et al [105] and Prasad and Krishna [165,209], which reported decreased hardness and wear performance when RHA was used to reinforce Al-alloys of AA6001 and AA356.2, respectively. However, contradictory evidence exists, with studies by Dinaharan et al [106], Muralimohan et al [68], and Muni et al [62] reporting superior mechanical properties and enhanced hardness and wear behaviour with RHA reinforcement.…”