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Solution hardening in niobium
Author(s) -
Harris B.
Publication year - 1966
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19660180223
Subject(s) - niobium , materials science , hardening (computing) , vanadium , zirconium , flow stress , tantalum , strain hardening exponent , tungsten , elastic modulus , modulus , fleischer , metallurgy , thermodynamics , strain rate , composite material , physics , archaeology , layer (electronics) , german , history
A study has been made of the solution hardening of niobium by tantalum, vanadium, zirconium, and tungsten. It is found that hardening is linear with composition at small concentrations and is simply related to the sum of the atomic size and elastic modulus differences. Agreement with the solution‐hardening model of Fleischer for f.c.c. metals is not exact, however, for the results indicate that the atomic size mismatch, rather than the elastic modulus difference, is the dominant factor in hardening. – Strain‐hardening, strain‐rate sensitivity, and temperature dependence of the flow‐stress are studied, and it is shown that the basic deformation mechanism remains unaltered by solute additions. It is suggested that the solutes raise the long‐range, athermal component of the flow‐stress and reduce the short‐range, thermally‐activated component.