Chinese Journal of Lasers, Volume. 38, Issue 6, 603019(2011)
Laser Caldding of Elasto-Plastical Properties of Particle Reinforced H13-TiC Composite Coatings
By the same laser cladding process, TiC reinforced H13 matix composite coatings with different contents of TiC particles are fabricated on H13 substrate. The quasi-static tensile properties and stress/strain curves of composite coatings are obtained. The experimental results show that the hardening effect is obvious after stress reaches the yield stress. With higher particle content, the elastic modulus and yield stress increase significantly, but the tensile strength does not change much. With scanning electronic microscope (SEM) observation after tensile fracture, at low content of TiC particles, the fractography distributes a large number of dimples, showing the ductile fracture, but with the increase of particles, the fracture mode changes from ductile to brittle. Based on the Mori-Tanaka mean-field homogenization scheme, coupling with ABAQUS subroutine UMAT, elasto-plastical properties of composite coatings are studied. Theoretical prediction agrees with the experimental results in a certain range of error.
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Gu Shengting, Hou Yifang, Chai Guozhong, Wu Huaping, Yao Jianhua. Laser Caldding of Elasto-Plastical Properties of Particle Reinforced H13-TiC Composite Coatings[J]. Chinese Journal of Lasers, 2011, 38(6): 603019
Category: materials and thin films
Received: Dec. 14, 2010
Accepted: --
Published Online: May. 20, 2011
The Author Email: Shengting Gu (gust1984@126.com)