Temperature Dependence of Young's Modulus of Beta-Brass Single Crystals

摘要: Young's modulus of seven single crystals beta-brass has been measured as a function temperature from 25\ifmmode^\circ\else\textdegree\fi{}C to 505\ifmmode^\circ\else\textdegree\fi{}C for the purpose studying order-disorder phenomenon. The method used is that composite piezoelectric oscillator. reciprocal linearly related orientation at all temperatures. maximum and minimum values modulus, 1/${\mathrm{E}}_{[100]}$ 1/${\mathrm{E}}_{[111]}$, are 3.881 0.475\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}12}$ room 4.970 0.583\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}12}$ ${\mathrm{cm}}^{2}$/dyne critical (468\ifmmode^\circ\else\textdegree\fi{}C). elastic anisotropy, given by ${\mathrm{E}}_{[111]}$/${\mathrm{E}}_{[100]}$, value, 8.2, temperature, decreases minimum, 7.2, 300\ifmmode^\circ\else\textdegree\fi{}C, again increases 8.6 temperature. Plots in three principal directions, [100], [110], [111], show effect disorder mainly felt first two while third direction elasticity shows an approximately linear increase with increasing Before sets [100] contrary usual behavior materials.