This paper studies the effect of high-pressure torsion (HPT) method at ambient temperature on mechanical properties of material. The aim is to compare copper subjected to HPT for 2, 10 and 30-revolutions with coarse grain structured copper in a cold-rolled state. Miniaturized tensile tests were performed to evaluate anisotropy of mechanical properties within a disc product of HPT process. Also the strain rate sensitivity was examined. The results of mechanical tests demonstrate that increasing shear strain leads to ultra-fine grain structure (UFG) which resulted in increasing of material strength. The plasticity of material decreases correspondingly to that. With respect to character of HPT process, discs are known as non-homogenous products, where shear strain effect increases in radial direction from the centre section to the edge. Results show that with different number of HPT revolutions the anisotropy of mechanical behaviour is changing. With increasing number of revolutions the anisotropy within a single disc is increasing.
|Журнал||IOP Conference Series: Materials Science and Engineering|
|Состояние||Опубликовано - 25 фев 2020|
|Событие||4th International Conference on PING 2019 - Modern Trends in Material Engineering - Pilsen, Чехия|
Продолжительность: 10 сен 2019 → 13 сен 2019
Предметные области Scopus
- Материаловедение (все)
- Технология (все)