Tension and fatigue behavior of Al-2124A/SiC-particulate metal matrix composites

Ji, Xia; Lewandowski, John J.; Willard, M. A.

doi:10.1016/j.msea.2019.138518

Cited by 33 publications

(19 citation statements)

References 24 publications

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“…[18] Strain-life results have shown that the LCF resistance of these materials is inferior to that of the unreinforced alloys due to their lower ductility and limited ability to accommodate plastic deformation. [18][19][20][21][22] A similar decrease in LCF life has been observed in alloys strengthened by grain size refinement. [23] For example, Li et al [24] reported that the LCF life for coarse-grained AA5083 aluminum alloy was superior to that of ultrafine-grained alloy processed by Equal Channel Angular Pressing.…”

Section: Introductionmentioning

confidence: 68%

“…At the low applied strains and stresses (high cycle regime), the increase in strength promoted by the addition of the particulates delays the nucleation of fatigue cracks and improves the fatigue life. [22] In fact, Chawla and Shen observed that crack initiation takes approximately 10 pct of the total fatigue life under low cycle conditions, but cracks do not nucleate until 70-90 pct of the total life in the high cycle regime. [57] Similar trends in fatigue performance of high strength materials at different plastic strain amplitudes were found by Han et al, [53] Mughrabi et al [58] , and Li et al [59] E. Post-Failure Examination Test results indicated that at all plastic strain amplitudes, the trimodal specimens failed before a 20 pct drop off in load.…”

Section: Cyclic Stress-strain Curvesmentioning

confidence: 99%

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Low Cycle Fatigue of an Ultrafine Grained AA5083 Aluminum Alloy Composite Produced by Cryomilling

Contreras

Vogt

Oliveira

et al. 2021

Metall Mater Trans A

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Low cycle fatigue (LCF) properties were investigated for a novel cryomilled AA5083 aluminum composite with duplex coarse and ultrafine grain sizes and reinforced with boron carbide particulates, referred to as trimodal material. Fully reversed cyclic tests were conducted under plastic strain control at plastic strain amplitudes from 0.15 to 0.6 pct using a constant plastic strain rate in a servo-hydraulic testing system. A nonlinear elastic modulus was used to calculate the elastic contribution to the measured total strain. The LCF performance of this trimodal material is compared to previous results for unreinforced AA5083 aluminum alloy with bimodal grain size (85/15 pct CM/UM) and its coarse-grained wrought counterpart, AA5083-H131. Stress response curves for the trimodal material revealed slow hardening until failure associated with the presence of particulate reinforcements. The very small asymmetry between tension and compression stresses reflects a lack of strain localization beyond the initial cycles. The trimodal and 85/15 pct CM/UM alloys have similar and superior low cycle fatigue strength compared to AA5083-H131. From the Coffin-Manson plot, the trimodal material has a shorter fatigue life than 85/15 pct CM/UM alloy and AA5083-H131 for high plastic strain amplitudes, but nearly identical life at low amplitudes. Microcracks were observed near the dominant crack on trimodal specimen surfaces at failure. Back-scattered images revealed that particulates altered the crack propagation direction; cracks nearly always propagated around particulates.

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Section: Introductionmentioning

confidence: 68%

Section: Cyclic Stress-strain Curvesmentioning

confidence: 99%

Low Cycle Fatigue of an Ultrafine Grained AA5083 Aluminum Alloy Composite Produced by Cryomilling

Contreras

Vogt

Oliveira

et al. 2021

Metall Mater Trans A

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“…Xia et al [ 1 ] investigated the fatigue properties of Al-2124A composites with the addition of 25% SiCp of 3 microns, in size and registered the improvement of fatigue characteristics in comparison with unreinforced material. Detailed fractography revealed the presence of unique, cone-shaped cracks in samples that break down under high cycle fatigue.…”

Section: Introductionmentioning

confidence: 99%

On Investigating the Microstructural, Mechanical, and Tribological Properties of Hybrid FeGr1/SiC/Gr Metal Matrix Composites

2021

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In recent years, studies of different properties of hybrid metal matrix composites, as well as very detailed issues, have been published. In this article, ready-made iron, graphite, and silicon carbide powders were used to produce the base material and composites. An analysis of some microstructural and mechanical properties, as well as the tribological behavior of metal matrix composites (MMCs), based on FeGr1 sintered material with the single and hybrid addition of a silicon carbide and graphite was undertaken. During the study, the flexural and compressive strength of MMCs were analyzed and changes of the momentary coefficient of friction, the temperature of friction, as well as wear rates of the MMCs tested were monitored. Based on the results, it was revealed that wear rates decreased 12-fold in comparison to the base material when SiC or SiC + Gr were added. Further research into MMCs with ceramic particle additives is proposed.

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“…Generally, in the case of wear, the whole element has to be replaced even if only a small part of the material surface is damaged by external conditions (e.g., pitting or scuffing mechanisms). The replacement of the whole element causes negative economic and environmental impacts because there remains a lack of effective methods of recycling aluminum matrix composites reinforced by silicon carbide [ 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Regeneration of Aluminum Matrix Composite Reinforced by SiCp and GCsf Using Gas Tungsten Arc Welding Technology

et al. 2021

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The main motivation behind the presented research was the regeneration of the damaged surface of composite materials. The testing of melting and pad welding of the composite surface by Gas Tungsten Arc Welding (GTAW) with alternating current (AC) were carried out. The material of investigation was an AlSi12/SiCp + GCsf hybrid composite made by a centrifugal casting process. The composite was reinforced with 5 wt.% of silicon carbide particles and 5 wt.% of glassy carbon spheres. The composites were investigated in tribological tests. It was found that there was a possibility for modification or regeneration of the surface with pad welding technology. Recommended for the repairs was the pad welding method with filler metal with a chemical composition similar to the aluminum matrix composite (ISO 18273 S Al4047A (AlSi12 [A])). The surface of the pad welding was characterized by the correct structure with visible SiCp. No gases or pores were observed in the pad welding; this was due to a better homogeneity of the silicon carbide (SiCp) distribution in the composite and better filling spaces between liquid metal particles in comparison to the base material. Based on the tribological tests, it was found that the lowest wear was observed for the composite surface after pad welding. This was related to the small number of reinforcing particles and their agreeable bonding with the matrix. The plastic deformation of the Al matrix and scratching by worn particles were a dominant wear mechanism of the surface.

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Tension and fatigue behavior of Al-2124A/SiC-particulate metal matrix composites

Cited by 33 publications

References 24 publications

Low Cycle Fatigue of an Ultrafine Grained AA5083 Aluminum Alloy Composite Produced by Cryomilling

Low Cycle Fatigue of an Ultrafine Grained AA5083 Aluminum Alloy Composite Produced by Cryomilling

On Investigating the Microstructural, Mechanical, and Tribological Properties of Hybrid FeGr1/SiC/Gr Metal Matrix Composites

Regeneration of Aluminum Matrix Composite Reinforced by SiCp and GCsf Using Gas Tungsten Arc Welding Technology

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