Details

Autor(en) / Beteiligte

• Levitas, Valery I.
• Dhar, Achyut
• Pandey, K. K.

Titel

Tensorial stress-plastic strain fields in α - ω Zr mixture, transformation kinetics, and friction in diamond-anvil cell

Ist Teil von

• Nature communications, 2023-09, Vol.14 (1), p.5955-5955, Article 5955

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Various phenomena (phase transformations (PTs), chemical reactions, microstructure evolution, strength, and friction) under high pressures in diamond-anvil cell are strongly affected by fields of stress and plastic strain tensors. However, they could not be measured. Here, we suggest coupled experimental-analytical-computational approaches utilizing synchrotron X-ray diffraction, to solve an inverse problem and find fields of all components of stress and plastic strain tensors and friction rules before, during, and after α-ω PT in strongly plastically predeformed Zr. Results are in good correspondence with each other and experiments. Due to advanced characterization, the minimum pressure for the strain-induced α-ω PT is changed from 1.36 to 2.7 GPa. It is independent of the plastic strain before PT and compression-shear path. The theoretically predicted plastic strain-controlled kinetic equation is verified and quantified. Obtained results open opportunities for developing quantitative high-pressure/stress science, including mechanochemistry, synthesis of new nanostructured materials, geophysics, astrogeology, and tribology. Fields of stress and plastic strain tensors in a sample under high pressures in diamond-anvil cells are important, but measuring them is difficult. Here, the authors suggest a coupled experimental-analytical-computational approach to measure them before, during, and after α−ω transformation in Zr.