Skip to main content
main-content

Tipp

Weitere Artikel dieser Ausgabe durch Wischen aufrufen

03.08.2020 | Special Issue: A Tribute to Prof. Dr. Gunther Eggeler, Invited Paper | Ausgabe 3/2020

Shape Memory and Superelasticity 3/2020

Selective Laser Melting of NiTi Shape Memory Alloy: Processability, Microstructure, and Superelasticity

Zeitschrift:
Shape Memory and Superelasticity > Ausgabe 3/2020
Autoren:
Carlo Alberto Biffi, Jacopo Fiocchi, Fabrizio Valenza, Paola Bassani, Ausonio Tuissi
Wichtige Hinweise

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

Nowadays, thanks to the growing interest regarding the manufacturing of 3D complex parts with integrated functionalities, the additive manufacturing of NiTi shape memory alloy is a challenging technological issue. Particularly, 3D printing of NiTi components requires a strong interaction between technological and metallurgical approaches, due to the significant correlation among the process conditions, the microstructure, and the functional performances. The goals of the present work are to define the processability of NiTi powder for realizing fully dense samples using Selective Laser Melting process and the correlation between the microstructure and the superelastic response of specimens processed in different process conditions. It was found that highest relative density values can be obtained for a laser fluence in the range 63–160 J/mm3. The resulting microstructures exhibit variable degrees of orientations, according to the different cooling rates and melt pool size, specific for each condition. Finally, mechanical testing in compression indicated that the as-built alloy exhibits a limited superelastic behavior. A typical flag-like behavior, characterized by 6% of complete recoverable strain, was obtained through heat treatment at 500 °C. This suggests that the microstructure of as-built samples is highly efficient to promote superelasticity after annealing.

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

Literatur
Über diesen Artikel

Weitere Artikel der Ausgabe 3/2020

Shape Memory and Superelasticity 3/2020 Zur Ausgabe

Special Issue: A Tribute To Prof. Dr. Gunther Eggeler, Invited Paper

Fatigue Crack Initiation in the Iron-Based Shape Memory Alloy FeMnAlNiTi

Special Issue: A Tribute to Prof. Dr. Gunther Eggeler, Invited Paper

Recent Developments in Small-Scale Shape Memory Oxides

Special Issue: A Tribute to Prof. Dr. Gunther Eggeler, Invited Paper

Pseudoelastic NiTiNOL in Orthopaedic Applications

Special Issue: A Tribute to Prof. Dr. Gunther Eggeler, Invited Paper

Development of Nickel-Rich Nickel–Titanium–Hafnium Alloys for Tribological Applications

Premium Partner

    Marktübersichten

    Die im Laufe eines Jahres in der „adhäsion“ veröffentlichten Marktübersichten helfen Anwendern verschiedenster Branchen, sich einen gezielten Überblick über Lieferantenangebote zu verschaffen. 

    Bildnachweise