Application of the Correlation between Hardness and Strength in Conventional Al Alloys into Semi Solid Processed Products

Abstract:

In the field of material production and application, strength and hardness are the two most common properties of metallic materials. It’s one familiar phenomenon that the hardness of one certain alloy has positive relationship with its strength in conventional dendritic alloys. When it comes to non-dendritic semi-solid alloys, it’s unclear that the relationship is still right or not. In this paper, the molecular mechanics, as well as finite element simulation and experimental verification were combined to study the internal deformation regularity of metallic material and the correlation between the two parameters was illustrated. Firstly, the displacement of solid atom in metallic crystal cell was well described in the view of energy cost. Secondly, the total strain amount under local indenting deformation (resistant boundary) and overall impressing deformation (free boundary) were compared to study the correlation between hardness and compression strength in semi-solid globule grain alloy. Finally, the data collected in semi-solid processed products was applied to be compared against traditional casting and wrought aluminum alloys.

• Periodical: Solid State Phenomena (Volume 285)
• Pages: 99-104
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.285.99
• Online since: January 2019
• Authors: Kang Du*, Wen Ying Qu, Yan Hong Jing, Qiang Zhu
• Keywords: Aluminium Alloys, Finite Element Simulation, Hardness, Mechanical Strength, Molecular Mechanics, Semi-Solid Casting

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