Study on the Structural Evolution During Non Isothermal Aging of an Al–Cu–Mg–Si Alloy by Means of Thermal Analysis

Hayoune, A.; Shabestari, S.G.; Hamana, D.

doi:10.1007/s12666-015-0726-2

Cited by 3 publications

(1 citation statement)

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“…Transition phases nucleate from these clusters which, despite the existence of elastic stresses induced by the difference in size between the atoms of the solvent and those of the solute, maintain coherent interfaces with the matrix thanks to their nanometric size. Due to the diffusion of the solute atoms, these precipitates can dissolve or increase in size until the interfacial bond is broken, giving rise to incoherent interfaces with the matrix [10]. The increase in strength is conditioned by the size, distribution, and coherence with the matrix of these precipitates [6].…”

Section: Introductionmentioning

confidence: 99%

A Trade-Off between Mechanical Strength and Erosive Wear Resistance in AlSi12CuMgNi Alloy Used to Manufacture Fan Blades for Underground Mines

Álvarez-Antolín

Segurado-Frutos

González-Pociño

et al. 2019

Metals

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The axial fan blades used in underground mines are usually manufactured in AlSi12CuMgNi alloy (EN AC 48000). They must have a high mechanical strength to withstand the stresses resulting from the rotation speed of the rotor and a high resistance to erosive wear caused by suspended particles from underground mining and transport operations. The aim of this paper is to determine the most suitable thermal treatment to simultaneously improve their mechanical strength and erosive wear resistance. To this end, two solution treatments at 525 °C with cooling in water were analysed, as well as several ageing times at 170 °C. The crystalline phases present in the as-cast state were quantified by X-ray diffraction following quenching and different ageing processes. Furthermore, erosion wear resistance was measured by means of compressed air blasting with corundum particles according to ASTM G76 (2004). The highest wear resistance was obtained in the as-cast state using gravity die casting, with the presence of Al4Cu2Mg8Si7 and Al3CuNi. This wear resistance was higher than that obtained after the ageing treatment. However, a trade-off between mechanical strength and wear resistance was observed after 12 h ageing, where the hardness obtained exceeded 160 HV and the wear resistance became similar to that obtained in the as-cast state.

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Section: Introductionmentioning

confidence: 99%