Experimental analysis of seed effect on the directional solidification of Sn-Pb alloy

Long Sun Chao, Yu Ru Chen, Fang Chun Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, an experiment model for the directional solidification of Lead/Tin alloy is built and the effects of different-shape seeds on the microstructures on the solidification microstructure are investigated. In a casting process, the temperature and concentration fields will affect the microstructures of materials and this influence is the key point of improving their mechanical and physical properties. It is not easy to control the morphology of solidifying microstructures. The scheme of directional solidification can make the microstructures grow along a fixed direction and it is also the base of single-crystal growth. In the experiment, a poly-grain seed with the same initial concentration of the solidifying casting is used to induce the columnar growth at the bottom portion of the casting, which could avoid the equiaxed growth due to the high undercooling or cooling rate there. In the experimental analysis, we studied the influences of different geometry seeds on the constrained growth, the preferential growth direction of dendrite, the grain size, the temperature gradient, the growth rate, the primary arm spacing and the secondary arm spacing. From the microstructure observation, the adding seed casting reduced the chill-affected and extended the directional solidification zone. This is expected to have the better or more complete structure of directional solidification.

Original languageEnglish
Title of host publicationPhysical and Numerical Simulation of Material Processing VI
EditorsJitai Niu, Jitai Niu, Guangtao Zhou, Guangtao Zhou
PublisherTrans Tech Publications Ltd
Pages343-347
Number of pages5
ISBN (Print)9783037853061
DOIs
Publication statusPublished - 2012
Event6th International Conference on Physical and Numerical Simulation of Materials Processing, ICPNS2010 - Guilin, China
Duration: 2010 Nov 162010 Nov 19

Publication series

NameMaterials Science Forum
Volume704-705
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other6th International Conference on Physical and Numerical Simulation of Materials Processing, ICPNS2010
CountryChina
CityGuilin
Period10-11-1610-11-19

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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