scholarly journals Microstructural Analysis of Ti-Based Shape Memory Alloys Following the Electrochemical Corrosion in Artificial Saliva

2017 ◽  
Vol 209 ◽  
pp. 012033
Author(s):  
C Baciu ◽  
E R Baciu ◽  
R Cimpoeșu ◽  
C G Levente ◽  
D G Bosinceanu ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Artificial Saliva ◽  
Microstructural Analysis ◽  
Electrochemical Corrosion

Laser Metal Deposition of Fe- and Co-Based Shape-Memory Alloys

2021 ◽  
Vol 1161 ◽  
pp. 105-112
Author(s):  
Niklas Sommer ◽  
Gabriel Mienert ◽  
Malte Vollmer ◽  
Christian Lauhoff ◽  
Philipp Krooß ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Microstructural Evolution ◽  
Microstructural Analysis ◽  
Metal Deposition ◽  
Thin Wall ◽  
Laser Metal Deposition ◽  
Wall Structures ◽  
Iron Based ◽  
First Time

In the present study, Iron-based FeMnAlNi and Cobalt-based CoNiGa shape-memory alloys (SMA) were processed by laser metal deposition for the first time. The materials show susceptibility to cracking upon processing when unheated substrates are employed. Pre-heating of the substrate materials eliminated cracking completely and enabled robust deposition of thin-wall structures. Microstructural analysis using optical microscopy revealed different microstructural evolution for the two materials considered.

scholarly journals Electrochemical corrosion response of ZrN coated Nickel-Titanium alloy in 0.9% NaCl solution

2021 ◽  
Vol 9 (8) ◽  
pp. 2547-2552
Author(s):  
Kailash R. Jagdeo
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Biomedical Application ◽  
Electrochemical Corrosion ◽  
Nickel Titanium ◽  
Micro Hardness ◽  
Nacl Solution ◽  
Corrosion Stability ◽  
Vapor Deposition Technique ◽  
Cathodic Arc

Abstract: The biomedical application as metallic body implants of Nickel-Titanium shape memory alloys are of high interest due to its unique property of pseudo elasticity. However, high content of nickel and its potential to release from the surface due to corrosion raises safety concerns about its allergic reactions, toxicity and carcinogenicity. Hence, it is necessary to produce proper passivity to prevent surface layer degradation. In this study, ZrN coating on Nickel-Titanium shape memory alloys was obtained by vacuum cathodic arc physical vapor deposition technique to improve electrochemical corrosion resistance. The electrochemical corrosion response was studied in 0.9% NaCl solution at 370C using Tafel extrapolation method. Surface morphology was studied using SEM/EDAX and XRD. ZrN coating increases corrosion stability and micro hardness. Keywords: Shape memory alloy; pseudoelasticity; vacuum cathodic arc PVD; electrochemical corrosion; micro hardness.

scholarly journals Mechanical behavior and microstructural analysis of NiTi-40Au shape memory alloys exhibiting work output above 400 °C

2017 ◽  
Vol 86 ◽  
pp. 33-44 ◽  
Author(s):  
Lee Casalena ◽  
Glen S. Bigelow ◽  
Yipeng Gao ◽  
Othmane Benafan ◽  
Ronald D. Noebe ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Microstructural Analysis ◽  
Work Output

scholarly journals SEM/EDS ANALYSES ON SHAPE MEMORY ALLOY SUBJECTED TO ELECTROCHEMICAL CORROSION

2020 ◽  
Vol 1 (1) ◽  
pp. 10-12
Author(s):  
E.R. Baciu ◽  
R.I. Vasluianu ◽  
M. Bolat ◽  
B. Bulancea ◽  
A. Murariu ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Artificial Saliva ◽  
Electrochemical Corrosion ◽  
Surface Chemical ◽  
Metallic Material ◽  
Corrosion Tests ◽  
Surface Chemical Composition ◽  
3D Microscopy ◽  
2D And 3D

The aim of the present paper was to investigate the modifications occurred in the Ti- based shape memory alloy subject to electrochemical corrosion in artificial saliva. By 2D and 3D microscopy and by qualitative determinations of the luminous variation we could notice the effects of electrochemical corrosion tests on the surface of the metallic material, and by EDS determinations (Line and Mapping modes) of the surface chemical composition we could determine the chemical modifications produced following the corrosion tests.

Atomic Order and Martensitic Transformation in Cu-Al-Be Shape Memory Alloys

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-973-C8-978
Author(s):  
M. Jurado ◽  
Ll. Mañosa ◽  
A. González-Comas ◽  
C. Stassis ◽  
A. Planes
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Atomic Order
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