A new model of growth restriction factor for hypoeutectic aluminium alloys. (1st April 2020)

• Record Type: Journal Article
• Authors: Zhang, Lili; Jiang, Hongxiang; He, Jie; Zhao, Jiuzhou
• Is Part Of: Scripta materialia. Number 179(2020)
• Page Start: 99
• Page End: 101
• Publication Date: 2020-04-01
• Subjects: Hypoeutectic aluminium alloys -- Constitutional supercooling -- Growth restriction -- Grain size; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.01.009
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A model is proposed to calculate growth restriction factor Q new for hypoeutectic aluminium alloy by considering not only the liquidus slope, solute concentration and partition coefficient, but also the solute solubility in α-Al and eutectic composition. The relation between α-Al average grain size and Q new is checked. The results demonstrate that different from the previous growth restriction factor which monotonically depends on the solute concentration c 0, Q new increases first with c 0 up to solute solubility in α-Al and then decreases with c 0 . Grain size increases with the inverse square root of Q new over the whole range of the hypoeutectic compositions. Graphical abstract: Image, graphical abstract