Accessible Requires Authentication Published by De Gruyter May 17, 2019

Investigation of semi-solid microstructures of an A356 alloy containing rare-earth Gd during isothermal heat treatment

Yong Hu, Longzhi Zhao, Dejia Liu, Yanchuan Tang and Yongqiang Han

Abstract

The effects of isothermal heat treatment on microstructures of an A356 alloy containing rare-earth gadolinium (Gd) were investigated to obtain an optimum semi-solid structure. Our results revealed that the primary α-Al phase of the semi-solid A356 alloy containing Gd was significantly refined and that its morphology was spherical or near-spherical. Increases in holding temperature and prolongation of holding time led to an initial decrease in size during the primary α-Al phase, followed by a gradual increase. Solid–liquid interfacial tension resulted in the spheroidization of the primary α-Al phase.


Correspondence address, Associate Professor Yong Hu, School of Materials Science and Engineering, East China Jiaotong University, No. 808, Shuanggang East Road, Nangchang 330013, P.R. China, Tel: +86-13576012078, E-mail:

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Received: 2018-06-25
Accepted: 2018-11-22
Published Online: 2019-05-17
Published in Print: 2019-05-15

© 2019, Carl Hanser Verlag, München