Mechanical Hardness and Elastic Stiffness of Alloys: Semiempirical Models
作者： Daryl G Clerc
DOI: 10.1016/S0022-3697(98)00237-6
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摘要: Abstract An atomic-level mechanical hardness model that is based on screened electrostatics and elastic shear (SEES) generalized to single-phase substitutional annealed alloys, a semiempirical method derived quantify property composition effects in binary alloys. The SEES adapted include interactions between dislocations alloying-elements, it applied eight three ternary Calculated hardnesses are within 10% (30%) of measured values for 45% (73%) the materials. Composition stiffness coefficients c11(x), c12(x) c44(x) evaluated 12 modulus G(x) bulk B(x) 22 These properties 3.0% measurement following percentages materials studied: G(x), 90%; B(x), 86%; 100%; c12(x), 92%, c44(x), 83%. theoretical behavior bilinear BCC materials, variably non-linear FCC equation its previously published (non-general) analog equivalent 70 71 studied. A discrepancy two equations occurs TiB2 which, when corrected, moves 15% closer yields fitting parameters corrected by −1.9%: A=0.2992, γB=6.2595 simple metals.
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