✍ Scribed by B. Welke; W. Tikvic; A. Svobodová; P. Lukác̆
No coin nor oath required. For personal study only.
Stress-strain curves of Cd-single crystals were measured at low temperatures down to 4.2 K. The resolved critical shear stress ro/p decreases with increasing temperature, showing a slope three to four lines larger in the interval 4.2-30 K than in the interval 30-300 K. The work-hardening coefficient shows a distinct temperature dependence in the easy-glide stage A as well as in stage B. The activation volume obtained from strain rate change experiments decreases during deformation by more than one order of magnitude. The experimental results are compared to the behaviour of f.c.c. metals. The temperature-dependence of the reduced work-hardening coefficients 6Jfi and 6,:~ cannot be explained by means of the commonly used work-hardening theories.
📜 SIMILAR VOLUMES
## Abstract The influence of temperature and strain rate on work hardening of a KCl crystal has been investigated. Using the experimental data on flow stress relaxation, the activation “volume” for dislocation motion and internal counteracting stresses have been calculated in the temperature range
## Abstract The change in microstructure during tensile deformation of magnesium single crystals by basal slip was studied with electron backscatter diffraction in the scanning electron microscope. Two samples were plastically deformed up to shear strains of 0.37 and 1.28 belonging to work‐hardenin
## Abstract Shear stress – shear strain curves of 0.14 at.%Ti alloyed Zn single crystals were measured in compression at different temperatures and shear strain rates. The work‐hardening coefficient for basal slip increases with decreasing temperature and increasing shear strain rate. The work‐hard