Application of polarized light microscopy on microstructural characterization of semisolid slurry

Liang，Xiao Kang1; Zhu，Qiang1,2; Luo，Min1; Li，Da Quan1

2018-07-04

Mass of liquid Microstructural characterization Polarized light microscopy Pouring temperature Semisolid

英语

In this paper, two ways of microstructural characterization, optical microscopy (OM) and polarized light microscopy (PLM), were both employed to describe the microstructure of semisolid slurry prepared by swirling enthalpy equilibration device (SEED). The results show that PLM is more reliable and accurate than OM to describe the special morphology feature of semisolid slurry made by SEED process. Meanwhile, the effects of pouring temperature and mass of molten liquid on the primary α-Al particle size and morphology were also investigated using PLM. The quantitative metallographic results measured from PLM demonstrate that the grain size and morphology and their distribution are significantly affected by both pouring temperature and the mass of molten liquid. The grain size poured with 2.7 kg liquid decreases from 659 to 186 μm, and grain morphology transforms from dendrite to globular structure with pouring temperature reducing from 690 to 630 °C. The decreasing pouring temperature also promotes the distribution of spherical structure on the cross section. Meanwhile, the mass of molten liquid decreasing from 2.7 to 2.3 kg can decrease the grain size by maximum of 44% at high pouring temperature.

10.1007/s12598-018-1078-y

RARE METALS

42

1-8

1001-0521

EI ; SCI

通讯

2-s2.0-85049568808

Scopus

20182805536453

Light polarization ; Grain size and shape ; Morphology ; Particle size

Light/Optics:741.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

1867-7185

MATERIALS SCIENCE

1.National Engineering Research Center for Composite Materials,General Research Institute for Nonferrous Metal,Beijing,100088,China
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Liang，Xiao Kang,Zhu，Qiang,Luo，Min,et al. Application of polarized light microscopy on microstructural characterization of semisolid slurry. 2018-07-04.