Laser shock processing of polycrystalline alumina ceramics | Zendy

Wang Fei | Zendy; Zhang Chenfei | Zendy; Lu Yongfeng | Zendy; Nastasi Michael | Zendy; Cui Bai | Zendy

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Laser shock processing of polycrystalline alumina ceramics

Author(s) -

Wang Fei,

Zhang Chenfei,

Lu Yongfeng,

Nastasi Michael,

Cui Bai

Publication year - 2017

Publication title -

journal of the american ceramic society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.9

H-Index - 196

eISSN - 1551-2916

pISSN - 0002-7820

DOI - 10.1111/jace.14630

Subject(s) - materials science , crystallite , ceramic , intergranular corrosion , indentation , residual stress , composite material , grain boundary , laser , shock (circulatory) , cracking , deformation (meteorology) , metallurgy , microstructure , optics , medicine , physics

Laser shock processing ( LSP ) has been applied to polycrystalline α‐Al 2 O 3 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‐Al 2 O 3 ceramics to indentation cracking. Microstructural characterization suggests that the majority of α‐Al 2 O 3 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.

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