Parameter optimization of microwave sintering porous Ti-23%Nb shape memory alloys for biomedical applications

2018 ◽  
Vol 28 (4) ◽  
pp. 700-710 ◽  
Author(s):  
Mustafa K. IBRAHIM ◽  
E. HAMZAH ◽  
Safaa N. SAUD ◽  
E.M. NAZIM ◽  
A. BAHADOR
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Parameter Optimization ◽  
Biomedical Applications ◽  
Microwave Sintering ◽  
Porous Ti

Shape memory characteristics of microwave sintered porous Ti–30 at.%Ta alloy for biomedical applications

2020 ◽  
Vol 234 (10) ◽  
pp. 1979-1989 ◽  
Author(s):  
Mustafa K Ibrahim ◽  
Safaa N Saud ◽  
E Hamzah ◽  
EM Nazim
Keyword(s):  
Shape Memory ◽  
Pore Size ◽  
Biomedical Applications ◽  
Microwave Sintering ◽  
Sintered Sample ◽  
Rich Region ◽  
Porous Ti ◽  
Mechanical Behaviours ◽  
Two Phases ◽  
Memory Characteristics

In this work, the influence of microwave sintering time and temperature on the microstructure characterisation, and thermal and mechanical behaviours of Ti–30Ta were investigated. The relative densities of Ti–30Ta samples were in the range of 65–72% and as the sintering times/temperatures increased, the relative density decreased. The pore size averages were in the range of 6–17 µm with different sintering parameters, for instance the smallest pore size of 6.8 µm was observed after being sintered at 900 ℃ for 30 min (Ta2). Two morphologies of plate-like (P) and needle-like (N) structures were observed, as well as two regions – dark region (Ti-rich region) and bright region (Ta-rich region), also two phases – β and α. The DSC results revealed that the Ms to Mf transformation range was 98.86 to 80.5 ℃, respectively, while the range of As to Af transformation was about −22.35 to 92 ℃, respectively. The maximum fracture strength and its strain were acquired in the sintered sample of 900 ℃ for 30 min. The total strain recovery (ɛT) was improved linearly as the sintering temperature increased, correspondingly, the best ɛT was implied in Ti–Ta shape memory alloys after being sintered at 1000 ℃ for 30 min (Ta4).

scholarly journals In Vitro Biocompatibility of Ni-Free Ti-Based Shape Memory Alloys for Biomedical Applications

2010 ◽  
Vol 51 (10) ◽  
pp. 1944-1950 ◽  
Author(s):  
Hiroyasu Kanetaka ◽  
Hideki Hosoda ◽  
Yoshinaka Shimizu ◽  
Tada-aki Kudo ◽  
Ye Zhang ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Biomedical Applications

Superelastic behaviour of Ti–Nb–Al ternary shape memory alloys for biomedical applications

2014 ◽  
Vol 121 ◽  
pp. 58-61 ◽  
Author(s):  
Muhammad Umer Farooq ◽  
Fazal Ahmad Khalid ◽  
Hamid Zaigham ◽  
Irfan Haider Abidi
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Biomedical Applications

Modeling the Torsional Behavior of Superelastic Wires

2011 ◽  
Author(s):  
Zohreh Karbaschi ◽  
Mohammad Elahinia
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Material Properties ◽  
Biomedical Applications ◽  
Effect Of Temperature ◽  
Torsional Loading ◽  
Torsional Testing ◽  
Torsional Behavior ◽  
Niti Wires ◽  
Torque Angle

Torsional behavior of shape memory alloys can be employed in different biomedical applications. The goal of this paper is to investigate the behavior of these alloys under torsional loading conditions. To this end a torsional model is developed in MATLAB, in which a uniaxial model is extended to predict the torque-angle behavior of superelastic wires/rods. Tensile and torsional testing are performed on NiTi wires to determine martial properties and to verify this model. The material properties are determined based on ASTM standards. The effect of different parameters such as lengths and radii on the torque-angle behavior are investigated with the model. Moreover, the effect of temperature on the torsional behavior of SMA wires are presented.

Nanostructured Shape Memory Alloys for Biomedical Applications

2007 ◽  
pp. 505-510
Author(s):  
Koichi Tsuchiya ◽  
Qi Feng Cao ◽  
Akihide Hosokawa ◽  
Masayuki Katahira ◽  
Yoshikazu Todaka ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Biomedical Applications

Microstructure and Shape Memory Properties of Biomedical Ti-(40-65) Ta (wt. %) Alloys

2009 ◽  
Vol 610-613 ◽  
pp. 1382-1386 ◽  
Author(s):  
Yun Qing Ma ◽  
Wan Jun Jin ◽  
Shui Yuan Yang ◽  
Jin Bin Zhang ◽  
Yi Xiong Huang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Biomedical Applications ◽  
Room Temperature ◽  
Human Bone ◽  
Orthorhombic Structure ◽  
Ni Alloys ◽  
Shape Memory Properties ◽  
Bcc Structure

Recently Ni-free Ti-based shape memory alloys have been actively studied for biomedical applications in order to replace Ti-Ni alloys which bear the possibility of Ni-hypersensitivity. In this paper, The Ti-(40-65) Ta (wt. %) alloys have been studied with regard to their microstructure, mechanical and shape memory properties, as well as the effect of heat treatment on their shape memory behaviors. The results show that Ti-40wt. %Ta exhibits single orthorhombic structure (''), Ti-55wt. %Ta mainly '' and a little BCC structure (β), and Ti-65wt. % Ta mainly β and a little '' at room temperature. The tensile strengths of Ti-Ta alloys are all over 550 MPa, and the elongations over 17%. The Young’s modulus of Ti-Ta alloys ranges from 66 to 75 GPa, which are closer to the modulus of human bone as compared with that of Ti-6Al-4V alloy. The maximal shape memory strain of 3.32% was obtained in Ti-55wt. %Ta alloy quenched at 1273 K followed by aging at 723 K for 10min. The obtained results will be beneficial for developing Ti-Ta alloys for biomedical applications.

Sign in / Sign up

Export Citation Format

Share Document