期刊
WEAR
卷 317, 期 1-2, 页码 56-63出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2014.05.002
关键词
Nickel-Aluminium Bronze; Neutron diffraction; Residual stress; Cavitation erosion
资金
- Defence Materials Technology Centre
In this study two types of laser surface treatment, laser surface melting and laser processing, were used to treat the surface of as cast Nickel-Aluminium Bronze. The two treatments were then subjected to cavitation erosion testing and were compared against as-cast Nickel-Aluminium Bronze. While the cavitation performance of the two types of laser surface treatment was equivalent, the morphology of the eroded surfaces was different. Several materials characterisation techniques including neutron diffraction for residual stress measurements and SEM were used to explain why the two eroded surfaces were different. It was found that the tensile residual stresses in the laser melted sample weakened the sample, which negated its superior strength when compared with the laser processed sample. It was also observed that the erosion and pitting in the laser melted sample were deeper and they were attributed to the tensile residual stresses accelerating the attack at grain boundaries. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.
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