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Enhancement strength of AZ91 magnesium alloy composites reinforced with graphene by T6 heat treatment and equal channel angular pressing
https://orcid.org/http://orcid.org/0000-0002-6582-0339
https://orcid.org/http://orcid.org/0000-0002-3273-5701
https://orcid.org/http://orcid.org/0000-0002-6740-8479
In this study, we investigated the use of graphene as a reinforcement material in magnesium alloy (AZ91) composites. The composites were prepared through stir-casting followed by a novel strength improvement process using T6 heat treatment and equal channel angular pressing (ECAP). Microstructural analysis through X-ray diffraction and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy substantiates new phases, including magnesium carbide (MgC2), which produce enhanced mechanical properties along with grain refinement after T6 heat treatment and ECAP. The addition of graphene increased the mechanical properties of the samples to 0.1 wt% graphene in the as-cast sample. However, the hardness and strength of 0.2 wt% graphene decreased because of agglomeration under the as-cast condition. Following two passes of ECAP, a 49.22% increase in hardness was observed in the composite, whereas the yield and ultimate tensile strength increased by 64.38% and 80.42%, respectively. The load transfer mechanism contributed to the strengthening of the AZ91/graphene composites and exhibited satisfactory interfacial bonding between the matrix and reinforcement. Ductile fractures were predominantly observed in T6- and ECAP-treated samples.
Enhancement strength of AZ91 magnesium alloy composites reinforced with graphene by T6 heat treatment and equal channel angular pressing
https://orcid.org/http://orcid.org/0000-0002-6582-0339
https://orcid.org/http://orcid.org/0000-0002-3273-5701
https://orcid.org/http://orcid.org/0000-0002-6740-8479
In this study, we investigated the use of graphene as a reinforcement material in magnesium alloy (AZ91) composites. The composites were prepared through stir-casting followed by a novel strength improvement process using T6 heat treatment and equal channel angular pressing (ECAP). Microstructural analysis through X-ray diffraction and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy substantiates new phases, including magnesium carbide (MgC2), which produce enhanced mechanical properties along with grain refinement after T6 heat treatment and ECAP. The addition of graphene increased the mechanical properties of the samples to 0.1 wt% graphene in the as-cast sample. However, the hardness and strength of 0.2 wt% graphene decreased because of agglomeration under the as-cast condition. Following two passes of ECAP, a 49.22% increase in hardness was observed in the composite, whereas the yield and ultimate tensile strength increased by 64.38% and 80.42%, respectively. The load transfer mechanism contributed to the strengthening of the AZ91/graphene composites and exhibited satisfactory interfacial bonding between the matrix and reinforcement. Ductile fractures were predominantly observed in T6- and ECAP-treated samples.
Enhancement strength of AZ91 magnesium alloy composites reinforced with graphene by T6 heat treatment and equal channel angular pressing
https://orcid.org/http://orcid.org/0000-0002-6582-0339
https://orcid.org/http://orcid.org/0000-0002-3273-5701
https://orcid.org/http://orcid.org/0000-0002-6740-8479
In this study, we investigated the use of graphene as a reinforcement material in magnesium alloy (AZ91) composites. The composites were prepared through stir-casting followed by a novel strength improvement process using T6 heat treatment and equal channel angular pressing (ECAP). Microstructural analysis through X-ray diffraction and scanning electron microscopy combined with energy-dispersive X-ray spectroscopy substantiates new phases, including magnesium carbide (MgC2), which produce enhanced mechanical properties along with grain refinement after T6 heat treatment and ECAP. The addition of graphene increased the mechanical properties of the samples to 0.1 wt% graphene in the as-cast sample. However, the hardness and strength of 0.2 wt% graphene decreased because of agglomeration under the as-cast condition. Following two passes of ECAP, a 49.22% increase in hardness was observed in the composite, whereas the yield and ultimate tensile strength increased by 64.38% and 80.42%, respectively. The load transfer mechanism contributed to the strengthening of the AZ91/graphene composites and exhibited satisfactory interfacial bonding between the matrix and reinforcement. Ductile fractures were predominantly observed in T6- and ECAP-treated samples.
Enhancement strength of AZ91 magnesium alloy composites reinforced with graphene by T6 heat treatment and equal channel angular pressing
Arch. Civ. Mech. Eng.
Huang, Song-Jeng (author) / Adityawardhana, Yudhistira (author) / Kannaiyan, Sathiyalingam (author)
2024-09-21
Article (Journal)
Electronic Resource
English
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