Microstructure and mechanical properties in Co–Ni–Ga–Al shape memory alloys with two-phase structure

2008 ◽  
Vol 462 (1-2) ◽  
pp. 225-228 ◽  
Author(s):  
P.N. Zhang ◽  
J. Liu
Keyword(s):  
Mechanical Properties ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Phase Structure ◽  
Two Phase ◽  
Microstructure And Mechanical Properties

Influence of Al-Content on the Microstructure and Mechanical Properties in ZrAlN Coatings

2014 ◽  
Vol 1004-1005 ◽  
pp. 778-783 ◽  
Author(s):  
Xiao Ying Zhu ◽  
Jun Du ◽  
Gui Min Liu ◽  
Xiao Hui Zheng
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Phase Structure ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Two Phase ◽  
Al Content ◽  
Microstructure And Mechanical Properties ◽  
Transmission Electron ◽  
Indentation Methods

Zirconium aluminum nitride coatings have been deposited onto Ti-6Al-4V substrates by reactive magnetron sputtering in order to investigate the influence of Al-content on the microstructure and mechanical properties. The morphology and microstructure of the coatings were investigated by field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). Nanoindentation and Vicker’s indentation methods were employed to measure the hardness and toughness of the coatings, respectively. The results show that a structure of single cubic phase with twinning is formed at Al content of x ≤ 0.23, and a two-phase structure of hexagonal and cubic phase is formed at Al content of x ≥ 0.47. Hardness and toughness of the Zr1-xAlxN coatings show similar tendency with the increasing of Al-content. Both of them reach the maximum values at x=0.23 and drop to the minimum values at x=0.47, after that, they slightly increase with the increasing Al-content. The enhanced hardness and toughness achieved at x=0.23 is ascribed not only to single cubic phase structure but also to twinning structure.

Effect of a fourth alloying element on the microstructure and mechanical properties of Cu–Al–Ni shape memory alloys

2015 ◽  
Vol 30 (14) ◽  
pp. 2258-2269 ◽  
Author(s):  
Safaa N. Saud ◽  
Esah Hamzah ◽  
Tuty Abubakar ◽  
Mustafa K. Ibrahim ◽  
Abdollah Bahador
Keyword(s):  
Mechanical Properties ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Alloying Element ◽  
Microstructure And Mechanical Properties ◽  
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