Refining grain structure and porosity of an aluminium alloy with intensive melt shearing

SCRIPTA MATERIALIA

卷:64

Article

Zuo, Y.¹  Li, H.¹  Xia, M.¹  Jiang, B.¹  Scamans, G. M.¹  Fan, Z.¹ 

[1] Brunel Univ, LiME, EPSRC Ctr Innovat Mfg Liquid Met Engn, BCAST, Uxbridge UB8 3PH, Middx, England

关键词: Aluminium alloys;    Intensive melt shearing;    Grain refining;    Porosity;   

DOI  :  10.1016/j.scriptamat.2010.09.046

来源: Elsevier

【 摘 要 】

Intensive melt shearing was achieved using a twin-screw machine to condition an aluminium alloy prior to solidification. The results show that intensive melt shearing has a significant grain-refining effect. In addition, the intensive melt shearing reduces both the volume fraction and the size of porosity. It can reduce the density index from 10.50% to 2.87% and the average size of porosity in the samples solidified under partial vacuum from around 1 mm to 100 mu m. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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