Premium
Some investigations in evaluating the cyclic stress‐strain curves of titanium alloys
Author(s) -
Li J.,
Qiu Y.Y.,
Li C.W.,
Zhang Z.P.
Publication year - 2018
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201800051
Subject(s) - compatibility (geochemistry) , titanium , materials science , strain hardening exponent , ultimate tensile strength , monotonic function , exponent , hardening (computing) , metallurgy , aluminium , structural engineering , composite material , mathematics , mathematical analysis , engineering , linguistics , philosophy , layer (electronics)
Most of the existing methods for estimating cyclic strength coefficient and cyclic strain hardening exponent are developed based on the experimental data of steel alloys or aluminum alloys. For titanium alloys, approximation methods are scarce in literature. In the present paper, the compatibility between Manson‐Coffin and Ramberg‐Osgood equations are evaluated using the 18 cyclic stress‐strain curves obtained from 13 titanium alloys. It is found that there is a reasonable correlation between the Ramberg‐Osgood's parameters ( K′ and n′ ) and the Manson‐Coffin's parameters ( σ′ f , ϵ′ f , b and c ). However, the indirect methods utilizing the Manson‐Coffin's parameters predicted from monotonic tensile data cannot be successfully applied to estimate the Ramberg‐Osgood's parameters on the basis of the compatibility assumption.