fig14

Figure 14. (A) Evolution of the diffraction peaks of (220)_Nb, (211)_B2 and (001)_B19′ during the tension of a Ni₄₁Ti₃₉Nb₂₀ alloy (Reproduced from Ref.[102]^[102]); (B) In a Ti-24Nb-4Zr-8Sn-0.1O single crystal, the (220)_β spot gradually splits into diffraction spots belonging to the orthorhombic α” and δ phases. (Reproduced from Ref.[103]^[103]); A Ti_75.25Al₂₀Cr_4.75 single crystal showing excellent superelasticity during tension: (C) B19 structure recorded at a stress of 780 MPa during in situ neutron diffraction; (D) calculated orientation dependence of transformation strain under tension and compression; (E) tensile loading-unloading stress-strain curves showing a large recovery strain of 7.3 %. (Reproduced from Ref.[104]^[104]).