| 1. |
Tabin J., Nalepka K.T.♦, Kawałko J.♦, Brodecki A., Bała P.♦, Kowalewski Z.L., Plastic Flow Instability in 304 Austenitic Stainless Steels at Room Temperature,
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, ISSN: 1073-5623, DOI: 10.1007/s11661-023-07223-5, pp.1-6, 2023 Abstract:
A remarkable plastic flow instability is observed during tensile deformation of the commercial 304 stainless-steel sheet at room temperature. It has been found that the occurrence of plastic flow instability in 304 is dependent on the strain rate and specimen gage length. Moreover, it is essentially the same as the necking caused by plastic instability in 316L. However, the enhanced strain hardening resulting from deformation-induced martensitic transformation facilitates the orderly propagation of the strain-localized band. Affiliations:
| Tabin J. | - | IPPT PAN | | Nalepka K.T. | - | other affiliation | | Kawałko J. | - | other affiliation | | Brodecki A. | - | IPPT PAN | | Bała P. | - | AGH University of Science and Technology (PL) | | Kowalewski Z.L. | - | IPPT PAN |
|  |
| 2. |
Kowalczyk-Gajewska K., Sztwiertnia K.♦, Kawałko J.♦, Wierzbanowski K.♦, Wroński M.♦, Frydrych K., Stupkiewicz S., Petryk H., Texture evolution in titanium on complex deformation paths: Experiment and modelling,
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, ISSN: 0921-5093, DOI: 10.1016/j.msea.2015.04.040, Vol.637, pp.251-263, 2015Abstract:
Texture evolution in commercially pure titanium deformed by equal-channel angular pressing (ECAP) and extrusion with forward–backward rotating die (KoBo) is studied both experimentally and numerically. New results are provided that demonstrate the effects of distinct and complex deformation paths on the texture in the ultra-fine grained (UFG) material obtained after severe plastic deformation (SPD). The numerical simulations are based on the self-consistent viscoplastic method of grain-to-polycrystal scale transition. A recently proposed modification of the probabilistic scheme for twinning is used that provides consistent values of the twin volume fraction in grains. The basic components of the experimentally observed texture are reasonably well reproduced in the modelling. The numerical simulations provide an insight into the internal mechanisms of plastic deformation, revealing substantial activity of mechanical twinning in addition to the basal and prismatic slip in titanium processed by ECAP. Keywords:
Texture evolution, UFG materials, SPD processes, Crystal plasticity, Twinning Affiliations:
| Kowalczyk-Gajewska K. | - | IPPT PAN | | Sztwiertnia K. | - | other affiliation | | Kawałko J. | - | other affiliation | | Wierzbanowski K. | - | other affiliation | | Wroński M. | - | other affiliation | | Frydrych K. | - | IPPT PAN | | Stupkiewicz S. | - | IPPT PAN | | Petryk H. | - | IPPT PAN |
|  |
