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Effect of Solution Heat Treatment of Nitinol (Ni55%-Ti45%) Manufactured via L-PBF

Agarwal, Neha orcid logoORCID: 0000-0002-1296-2560, Obeidi, Muhannad Ahmed orcid logoORCID: 0000-0003-2733-3828, Brabazon, Dermot orcid logoORCID: 0000-0003-3214-6381, Asal, Karim, Faraoni, Andrea and Pola, Annalisa orcid logoORCID: 0000-0002-0722-6518 (2024) Effect of Solution Heat Treatment of Nitinol (Ni55%-Ti45%) Manufactured via L-PBF. SMST 2024 Conference Proceedings . pp. 3-4.

Abstract
The properties of nitinol, an alloy of nickel and titanium, include its good biocompatibility, corrosion resistance, damping capacity, fatigue strength, superelasticity, and shape memory characteristics. With other conventional methods, it has been challenging to achieve high precision and accuracy of the produced parts; however, laser powder bed fusion (L-PBF) has provided a useful new route for the processing of nitinol. While L-PBF offers many advantages, it also has drawbacks, including the potential for the formation of different phases and residual stress during rapid solidification. Post L-PBF heat treatment conditions aid in the generation of targeted stable phases. As reported by Lee et. al., the mechanical properties and transformation temperatures of the manufactured nitinol samples were largely influenced by the heat treatment. Fan et. al. showed an increase in the transformation temperatures by increasing the heat treatment temperatures after a solution heat treatment. Heat treatments that help in achieving the desired properties are two-step heat treatment processes. This study investigates the feasibility of applying a single-step solution heat treatment to Ni-rich nitinol and reports its effects on density, transformation temperatures, microstructures and microhardness for intended applications.
Metadata
Item Type:Article (Published)
Refereed:Yes
Subjects:Engineering > Mechanical engineering
DCU Faculties and Centres:UNSPECIFIED
Publisher:2024 ASM International
Official URL:https://dl.asminternational.org/shape-memory/proce...
Copyright Information:2024 ASM International
ID Code:30025
Deposited On:21 May 2024 10:22 by Connor Hillman . Last Modified 21 May 2024 10:40
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