The deformation of B4C particle in the B4C/2024Al composites after high velocity impact

Zhisong Zhou; Gaohui Wu; Longtao Jiang; Zhongguo Xu

doi:10.1016/j.micron.2014.07.006

The deformation of B4C particle in the B4C/2024Al composites after high velocity impact

Micron. 2014 Dec:67:107-111. doi: 10.1016/j.micron.2014.07.006. Epub 2014 Aug 1.

Authors

Zhisong Zhou¹, Gaohui Wu², Longtao Jiang³, Zhongguo Xu³

Affiliations

¹ School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China. Electronic address: hitzhisongzhou@gmail.com.
² School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China. Electronic address: wugh@hit.edu.cn.
³ School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.

PMID: 25127100
DOI: 10.1016/j.micron.2014.07.006

Abstract

In the present work, B4C/2024Al composites with volume fraction of 45% were prepared by a pressure infiltration method. The microstructure of the crater bottom of B4C/2024Al composite after impact was characterized by transmission electron microscope (TEM), which indicated that recovery and dynamic recrystallization generated in Al matrix, and the grain size distribution was about from dozens of nanometer to 200 nm. Furthermore, the plastic deformation was observed in B4C ceramic, which led to the transformation from monocrystal to polycrystal ceramic grains. The boundary observed in this work was high-angle grain boundary and the two grains at the boundary had an orientation difference of 30°.

Keywords: Crystal structure; Focused ion beam (FIB); Impact; Metal matrix composites, Microstructure; Plastic deformation.