Microhardness and microstructure evolution of ultra-fine grained Ti-15Mo and TIMETAL LCB alloys prepared by high pressure torsion

0469102 - ÚT 2018 RIV CH eng J - Článek v odborném periodiku
Václavová, K. - Stráský, J. - Polyakova, V. - Stráská, J. - Nejezchlebová, J. - Seiner, Hanuš - Semenova, I. - Janeček, M.
Microhardness and microstructure evolution of ultra-fine grained Ti-15Mo and TIMETAL LCB alloys prepared by high pressure torsion.
Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. Roč. 682, January (2017), s. 220-228. ISSN 0921-5093. E-ISSN 1873-4936
Grant CEP: GA ČR GB14-36566G
Institucionální podpora: RVO:61388998
Klíčová slova: decreasing elastic constants * high pressure torsion * metastable β-Ti alloys
Obor OECD: Materials engineering
Impakt faktor: 3.414, rok: 2017
http://ac.els-cdn.com/S0921509316313892/1-s2.0-S0921509316313892-main.pdf?_tid=9671056a-2f20-11e7-9f86-00000aab0f26&acdnat=1493720446_083fd54a3eb01b1ffc9659d69fb84673

The evolution of microhardness, microstructure and elastic constants of two metastable β-Ti alloys with increasing strain imposed by high pressure torsion was investigated. Fragmentation of the microstructure was observed by scanning electron microscopy. Microhardness significantly increases with increasing strain and was fitted using Hollomon and Voce laws. The measurement of elastic constants using resonant ultrasound spectroscopy showed that the deformation by high pressure torsion increases the Young's modulus as compared to solution treated material. On the other hand, further straining causes subsequent decrease of the Young's modulus.
Trvalý link: http://hdl.handle.net/11104/0271396