Effect of lattice preferred orientation on lattice strains in polycrystalline materials deformed under high pressure: Application to hcp-Co Original Research Article

Samples of crystalline fibers of Nylon 6,12 gamma-irradiated under argon atmosphere were characterized by in situ high-temperature Raman spectroscopy. Identification of the most important Raman bands that characterize the nylon 6,12 is reported. In this study we show the effect of the preferred orientation of the crystals in the fiber on the Raman spectra, showing the Brill transition from triclinic to pseudo-hexagonal system. The stability of the crystalline fibers, which depends on the temperature as well as on the gamma-radiation applied, is another important result of this work.