Anisotropy of mechanical properties in a hot-pressed boron carbide

• Author(s) / Creator(s)

  • Farbaniec, Lukasz
  • Hogan, James D.
  • McCauley, James W.
  • Ramesh, Kaliat T.

• Effects of microstructure and material properties on the mechanical behavior of hot-pressed boron carbide are presented. The microstructure and intrinsic microstructural inhomogeneities have been characterized using scanning electron
  microscopy characterization techniques (SEM/EDS/EBSD). In-situ mechanical characterizations of the boron carbide microstructure and its larger inhomogeneities have been performed by nanoindentation. Macroscopic dynamic
  and quasi-static compressive responses have been studied in two characteristic orientations (parallel and perpendicular to the hot-pressing direction) using a modified compression Kolsky bar setup (strain rates of 102 { 103 s{1) and standard MTS test machine (strain rates of 10{4 { 10{3 s{1). The microstructure characterization showed that boron carbide has a fine-grained microstructure with a complex superposition of non-metallic inclusions, such as free carbon, AlN and BN. Nanoindentation tests conducted in three principal planes of the plate revealed an anisotropy of the mechanical properties. The compression
  tests revealed that the strength of this hot-pressed boron carbide is orientation-dependent. Detailed SEM analysis indicated transgranular fracture and micro-cracking originating at large carbon inclusions. Influences of microstructural anisotropy on the mechanical response of the material is discussed.

• Date created

  2016-01-01

• Subjects / Keywords

  • Boron carbide
  • Microstructural characterizations
  • Nanoindentation
  • Kolsky bar technique
  • Brittle failure

• Type of Item

  Article (Draft / Submitted)

• DOI

  https://doi.org/10.7939/r3-zny3-kv08

• License

  This is the peer reviewed version of the following article: Farbaniec, Lukasz, James Hogan, James McCauley, and Kaliat Ramesh. "Anisotropy of Mechanical Properties in a Hot-Pressed Boron Carbide." International Journal of Applied Ceramic Technology 13, no. 6 (2016): 1008-1016., which has been published in final form at https://doi.org/10.1111/ijac.12585. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.