Laser Shock Processing of Polycrystalline Alumina Ceramics

Fei Wang, Chenfei Zhang, Yongfeng Lu, Michael Nastasi, Bai Cui

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Laser shock processing (LSP) has been applied to polycrystalline α-Al2O3 ceramics. X-ray characterizations have revealed that LSP results in significant compressive residual stresses which can extend to a depth of more than 1.2 mm from the surface. The presence of compressive residual stresses improves the resistance of α-Al2O3 ceramics to indentation cracking. Microstructural characterization suggests that the majority of α-Al2O3 grains on the surface remains intact after LSP. However, damaged regions are occasionally present, which shows intergranular fractures and a limited plastic deformation in the vicinity of grain boundaries.

Original languageEnglish (US)
JournalJournal of the American Ceramic Society
DOIs
StateAccepted/In press - 2016

Fingerprint

Aluminum Oxide
Alumina
Compressive stress
Lasers
Residual stresses
Processing
Indentation
Plastic deformation
Grain boundaries
X rays

Keywords

  • Alumina
  • Lasers
  • Mechanical properties

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Laser Shock Processing of Polycrystalline Alumina Ceramics. / Wang, Fei; Zhang, Chenfei; Lu, Yongfeng; Nastasi, Michael; Cui, Bai.

In: Journal of the American Ceramic Society, 2016.

Research output: Contribution to journalArticle

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AU - Cui, Bai

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