Yuriy Chumlyakov

TL;DR: In this paper, the authors study the instrumented Vickers micro-indentation of single-crystal Ti-50.9 at% Ni shape-memory alloys with systematically varied surface normal orientations (0 nm, 10 nm, 50 nm, 100 nm, 300 nm, and 500 nm).

TL;DR: In this article, a new theory for compound twinning is introduced with lattice invariant shear as a solution, and relies on the successive austenite phase (B2) to intermediate phase (R) to martensite phase 19′ transformation.

TL;DR: In this article, room temperature monotonic and cyclic stress-strain curves for single crystal and polycrystalline NiTi shape memory alloys containing Ti3Ni4 precipitates are presented.

TL;DR: In this paper, single crystals of NiTi (with 50.8 at.% Ni) were subjected to cyclic loading conditions at room temperature which is above the M s (martensite start) temperature of −30°C.

TL;DR: In this paper, the influence of grain boundaries and grain misorientations on stress-induced martensitic transformations in NiTi was studied using unique experiments and finite element modeling, and it was shown that grains that are favorably oriented with respect to the loading axis create local stresses that invariably assist the transformation in neighboring grains.