Thermal expansion of cast and of swaged chromium

Abstract

Data were obtained on the linear thermal expansion of six samples of chromium (99.2 to 96.3 percent) at various temperatures between -190 0 and + 707 0 C. The expansion curves indicated anomalies at low temperatures. These anomalies were reversible on heating and cooling. The temperature at which anomalous expansion occurs appears to decrease with decrease in the purity of the chromium. Hysteresis was not observed on heating cast or swaged chromium to 300 0 C and cooling to low temperatures. Exceptionally low average coefficients of expansion were found for temperature ranges in or near the anomalous regions. The average coefficients of expansion of the samples of chromium from 20 0 C to various temperatures between 100 0 and 700 0 C lie between 5. 7X 10-6 and 10.3X 10-6 per degree centigrade.

Reliability evaluation of thermophysical properties from first-principles calculations

“…Abbreviations are the same as declared in the caption of figure4. Experimental data are from references[85][86][87][88][89][90][91][92][93][94][95][96][97][98] (heat capacity), references[24,26,[94][95][96][97][98][99][100][101][102][103][104]109] (lattice parameter), references[34,[105][106] (thermal expansion) and references[35,[107][108][109] (isothermal bulk modulus).…”

Thermodynamic modeling of Cr and Cr–H systems up to high temperatures and high pressures

“…6, between the model for the bcc Cr and the experimental values within the temperature and pressure range allowed in this model. Experimental data for bcc Cr are from Erfling [25], Hidnert [26], Fine et al [27], Stankus [23],…”

“…The molar volume variations with temperature and/or pressure were determined using diffraction, penetrating -radiation and shock-wave experiment. The bcc chromium thermal expansivity was studied by interferometry [25][26][27], penetrating -radiation [23], dilatometry [28] and diffraction [24] and the bulk modulus temperature dependence was collected up to 1600 K [16,[32][33][34][35].…”