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- 저자 : Antonietta Loconte (검색결과 1 건)
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Effect of Laser Microcutting on Thermo-Mechanical Properties of NiTiCu Shape Memory Alloy
Carlo Alberto Biff,Paola Bassani,Marco Carnevale,Nora Lecis,Antonietta Loconte,Barbara Previtali,Ausonio Tuissi 대한금속·재료학회 2014 METALS AND MATERIALS International Vol.20 No.1
The machining of shape memory alloys (SMAs), such as NiTi based alloys, is a very interesting and rele-vant topic for several industrial applications in the biomedical, sensor and actuator fields. Laser technology isone of the most suitable methods for the manufacturing of products in the aforementioned fields, mainlywhen small and precise features have to be included. Due to the thermal nature of this process, study of itseffect on the functional properties of these materials is needed. Except for binary NiTi, few results on thelaser machining of NiTi based alloys are available in the literature. In this work, thin sheets of Ni40Ti50Cu10(at.%) were processed by a fibre laser and the effect of process speed on the material properties was analy-sed. Scanning electronic microscopy was adopted for observation of the laser cut edges’ morphology. Chemi-cal composition of the processed material was evaluated by energy dispersion spectroscopy and nanohardnessmeasurements were used to estimate the heat affected zone. SMA functional properties were studied on bothbase and laser machined material. These characteristics are affected by laser machining for the presence ofmelted material; this effect can be minimised by increasing the laser process speed.
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