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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
Published/Copyright: May 17, 2019
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 110 Issue 5

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.

Keywords: Semi-solid; A356 alloy; Rare-earth Gd; Isothermal heat treatment; Microstructure
∗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

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https://doi.org/10.3139/146.111760
Keywords for this article
Semi-solid; A356 alloy; Rare-earth Gd; Isothermal heat treatment; Microstructure

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Relationship between the variation in transformation temperatures, resistivity and dislocation density during thermal cycling of Ni50Ti50 shape memory alloy
  5. A critical analysis of the X-ray diffraction intensities in concentrated multicomponent alloys
  6. Thermodynamic investigations in the Al–Fe system: Thermodynamic modeling using CALPHAD
  7. Investigation of semi-solid microstructures of an A356 alloy containing rare-earth Gd during isothermal heat treatment
  8. Effects of double-ageing on the mechanical properties and microstructural evolution in the 1460 alloy
  9. Mechanical properties characterisation of AlSi10Mg parts produced by laser powder bed fusion additive manufacturing
  10. Tribological performance and corrosion behavior of aluminum alloy protected by Cr-doped diamond-like carbon thin film
  11. Effect of sintering temperature on the densification and optical properties of spark plasma sintered ZnSe ceramics
  12. Mono-crystalline SnTe with micro-octahedroncharacteristic: One-pot facile synthesis and comprehensive crystallographic evidence
  13. Finite element simulation of the residual stress in Ti6Al4V titanium alloy laser welded joint
  14. Short Communications
  15. Mechanism of the effect of electron beam melting on the distribution of oxygen, nitrogen and carbon in silicon
  16. Synthesis and study of structural, morphological, optical and toxicological properties of ferromagnetic cobalt oxide nanoparticles in liver carcinoma cell line
  17. DGM News
  18. DGM News
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