Solidification Processes of Light Metal Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: closed (20 October 2019) | Viewed by 4205

Special Issue Editor


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Guest Editor
Institut Jean Lamour, CNRS - Université de Lorraine, 2 allée André Guinier, BP 50840, F-54011 Nancy, CEDEX, France
Interests: solidification; heat and mass transfer; phase change with convection; multiscale modeling; casting processes; additive manufacturing

Special Issue Information

Dear Colleagues,

Solidification is at the origin of microstructure, macrostructure, and defects in many processing methods for light metals: Casting, welding, remelting processes, and additive manufacturing techniques. The link between process conditions and the structure formed during solidification is an inherently multiscale problem. Progress is therefore made on many fronts, ranging from mechanisms of nucleation and grain refinement, microstructure evolution during solidification, solutal, hydrodynamic and mechanical interactions in the mushy zone, to process-scale heat and mass transfer. Finally, an understanding of the coupling of some of these aspects of physics can be achieved by targeted experiments and multiscale modeling.

This Special Issue is intended to gather articles reporting latest advances on the following aspects of solidification processing in light metals:

  1. Grain nucleation and grain refinement.
  2. Formation of solidification microstructures.
  3. Mushy zone dynamics (e.g., solidification kinetics in presence of inter-grain interactions, hydrodynamics, rheology).
  4. Heat and mass transfer and fluid flow at the process scale and the links to microstructure and defect formation (segregation, porosity, deformation and hot tearing) during solidification.

Dr. Miha Zaloznik
Guest Editor

Manuscript Submission Information

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Keywords

  • Solidification
  • Light metals
  • Casting
  • Welding
  • Additive manufacturing
  • Microstructure
  • Mushy zone
  • Heat and mass transfer

Published Papers (1 paper)

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Research

12 pages, 19381 KiB  
Article
Effects of Yb Addition on the Microstructure and Mechanical Properties of As-Cast ADC12 Alloy
by Junjie Xiong, Hong Yan, Songgen Zhong and Minzhu Bi
Metals 2019, 9(1), 108; https://doi.org/10.3390/met9010108 - 21 Jan 2019
Cited by 6 | Viewed by 3839
Abstract
The effects of addition of different amounts of rare earth ytterbium (Yb) on the microstructure and mechanical properties of the casting ADC12 alloy were investigated by mechanical properties testing and microstructure observation. The results indicate that Yb modification had a big influence on [...] Read more.
The effects of addition of different amounts of rare earth ytterbium (Yb) on the microstructure and mechanical properties of the casting ADC12 alloy were investigated by mechanical properties testing and microstructure observation. The results indicate that Yb modification had a big influence on the microstructure and properties of the as-cast alloy. The optimum level of Yb content was 0.8 wt %. The coarse dendritic primary α-Al phases were fully refined, leading to the decreasing of the secondary dendrite arm spacing. The morphology of eutectic silicon phases changed from acicular into short rod-like and even granular. There was a structural transformation of β-Fe phases from massive to small rod-shaped morphology. Additionally, the tensile strength, elongation, and microhardness were 267.9 MPa, 4.2%, and 107.3 HV, respectively, increases of 55.4, 121.1, and 41.4%, respectively, compared with the matrix alloy. Fractographic examinations reveal that mainly ductile fracture for Yb addition of 0.8 wt %. The fracture appearances matched the tendency of the tensile properties. Furthermore, the addition of Yb can generate a rare earth phase consisting of the three elements of Al, Si, Yb, with some small iron-rich phases attached around the rare earth phase. Full article
(This article belongs to the Special Issue Solidification Processes of Light Metal Alloys)
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