Mechanical characterization of low temperature thermomechanical treated AA6061-silica sand composites

Sadanand, Ramakrishna Vikas; Sharma, Sathyashankara; Prabhu, P R

doi:10.1016/j.matpr.2023.01.298

Cited by 1 publication

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“…Researchers have also used various ceramic materials in particulate form such as Al 2 O 3 , SiC, B 4 C, TiC and TiB 2 [8][9][10][11][12][13][14][15][16], as reinforcement materials to fabricate Aluminium Matrix Composites (AMCs). Silica sand is naturally available in riverbeds and can be used as strengthening reinforcement as it has a high hardness and is a ceramic material that can withstand high temperatures [17]. Additionally, copper (Cu) has a face-centred cubic (FCC) structure that strains the aluminium matrix by supporting the cold deformation.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effects of cold rolling and age hardening on the hardness and tensile characteristics of AA6061 hybrid composites

Sadanand,

Sharma,

Prabhu

2024

Mater. Res. Express

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The present study involves the fabrication of aluminium alloy 6061 matrix hybrid composites with varying weight fractions of silica sand and copper particles by employing the conventional stir casting method. The combined influence of age hardening (AH) and low temperature thermomechanical treatment (LTMT) on the hardness and tensile properties of AA6061 hybrid composites was investigated. The uniform dispersion of the particles in the matrix was confirmed by microstructure analysis and the improvement of Brinell hardness values. The composites exhibited higher tensile strength and hardness than the base alloy. The peak hardness and tensile strength at the peak aged condition of the hybrid composites were determined through the Vickers hardness and tensile test, respectively. Both AH and LTMT enhanced the properties of the hybrid composites, and a comparison between them revealed the best results for LTMT hybrid composites. The LTMT hybrid composite with 3 wt.% silica sand and 3 wt.% copper (3S3C) subjected to 12% rolling deformation and aged at 100 °C had the highest Vickers hardness and tensile strength of 144.26 HV and 290 MPa, respectively. The hardness and tensile strength of AA6061-3S3C hybrid composite subjected to LTMT in peak aged condition showed an improvement of 125 and 97%, respectively, compared with those of AA6061 alloy. Fracture surface analysis of the thermomechanical treated composites in peak aged condition showed a mixed mode of failure dominant with the ductile fracture.

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