Tests on Pretrained Superelastic NiTi Shape Memory Alloy Rods: Towards Application in Self-Centering Link Beams

Table 3

Forward transformation stress at typical loading cycles.

Specimens	Forward transformation stress
	After incremental cycles		After 5 constant cycles		After 10 constant cycles		After 15 constant cycles		After 20 constant cycles		After 25 constant cycles
	σ0 (MPa)	σ0/σ25	σ5 (MPa)	σ5/σ25	σ10 (MPa)	σ10/σ25	σ10 (MPa)	σ10/σ25	σ10 (MPa)	σ10/σ25	σ10 (MPa)
D14/14-N-N	674	1.06	657	1.04	650	1.03	644	1.02	640	1.01	633
D14/14-300-30	605	1.10	578	1.05	568	1.04	557	1.02	551	1.01	548
D14/14-350-30	399	1.65	313	1.29	275	1.14	258	1.07	244	1.01	242
D14/14-400-30	360	1.95	253	1.40	216	1.19	202	1.12	188	1.04	181
D14/14-450-30	210	1.44	175	1.20	163	1.12	155	1.06	150	1.03	146