Cavitation erosion-corrosion characteristics of laser surface modified NiTi shape memory alloy

Z. D. Cui; Hau Chung Man; F. T. Cheng; Tai Man Yue

doi:10.1016/S0257-8972(02)00399-7

Cavitation erosion-corrosion characteristics of laser surface modified NiTi shape memory alloy

Z. D. Cui, Hau Chung Man, F. T. Cheng, Tai Man Yue

Research output: Journal article publication › Journal article › Academic research › peer-review

55 Citations (Scopus)

Abstract

In the presented work, the cavitation erosion-corrosion behavior of a nearly equiatomic NiTi alloy subjected to hot rolled, laser surface melting and laser gas nitriding (LGN) was investigated. Results show that the tested samples are very resistant to erosion damage. Secondary phases and inclusions are harmful to the erosion resistance of the alloy, and the interface between particles and matrix initiates the crack formation and material removal. A clean, compact microstructure with ultrafine grain, high work hardening ability and fatigue strength contributes to the improved resistance to cavitation erosion-corrosion of the laser surface melted NiTi alloy. The high resistance to erosion of the LGN sample is attributed to the high hardness of the TiN surface layer.

Original language	English
Pages (from-to)	147-153
Number of pages	7
Journal	Surface and Coatings Technology
Volume	162
Issue number	2-3
DOIs	https://doi.org/10.1016/S0257-8972(02)00399-7
Publication status	Published - 20 Jan 2003

Keywords

Cavitation erosion
Laser gas nitriding
Laser surface melting
NiTi alloy

ASJC Scopus subject areas

Surfaces, Coatings and Films
Condensed Matter Physics
Surfaces and Interfaces

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10.1016/S0257-8972(02)00399-7

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abstract = "In the presented work, the cavitation erosion-corrosion behavior of a nearly equiatomic NiTi alloy subjected to hot rolled, laser surface melting and laser gas nitriding (LGN) was investigated. Results show that the tested samples are very resistant to erosion damage. Secondary phases and inclusions are harmful to the erosion resistance of the alloy, and the interface between particles and matrix initiates the crack formation and material removal. A clean, compact microstructure with ultrafine grain, high work hardening ability and fatigue strength contributes to the improved resistance to cavitation erosion-corrosion of the laser surface melted NiTi alloy. The high resistance to erosion of the LGN sample is attributed to the high hardness of the TiN surface layer.",

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AU - Cui, Z. D.

AU - Man, Hau Chung

AU - Cheng, F. T.

AU - Yue, Tai Man

PY - 2003/1/20

Y1 - 2003/1/20

N2 - In the presented work, the cavitation erosion-corrosion behavior of a nearly equiatomic NiTi alloy subjected to hot rolled, laser surface melting and laser gas nitriding (LGN) was investigated. Results show that the tested samples are very resistant to erosion damage. Secondary phases and inclusions are harmful to the erosion resistance of the alloy, and the interface between particles and matrix initiates the crack formation and material removal. A clean, compact microstructure with ultrafine grain, high work hardening ability and fatigue strength contributes to the improved resistance to cavitation erosion-corrosion of the laser surface melted NiTi alloy. The high resistance to erosion of the LGN sample is attributed to the high hardness of the TiN surface layer.

AB - In the presented work, the cavitation erosion-corrosion behavior of a nearly equiatomic NiTi alloy subjected to hot rolled, laser surface melting and laser gas nitriding (LGN) was investigated. Results show that the tested samples are very resistant to erosion damage. Secondary phases and inclusions are harmful to the erosion resistance of the alloy, and the interface between particles and matrix initiates the crack formation and material removal. A clean, compact microstructure with ultrafine grain, high work hardening ability and fatigue strength contributes to the improved resistance to cavitation erosion-corrosion of the laser surface melted NiTi alloy. The high resistance to erosion of the LGN sample is attributed to the high hardness of the TiN surface layer.

KW - Cavitation erosion

KW - Laser gas nitriding

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JO - Surface and Coatings Technology

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Cavitation erosion-corrosion characteristics of laser surface modified NiTi shape memory alloy

Abstract

Keywords

ASJC Scopus subject areas

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