Abstract
The flow behavior of the SnSbCu alloy is studied experimentally by the compression tests in the range of the strain rates from 0.0001 to 0.1 s−1 and temperature from 293 to 413 K. Based on the experimental data, three constitutive models including the Johnson–Cook (J–C), modified Zerilli–Armstrong (Z–A), and Arrhenius-type (A-type) models are compared to find out an optimum model to describe the flow behavior of the SnSbCu alloy. The results show that the J–C model could predict the flow behavior of the SnSbCu alloy accurately only at some specific strain rates and temperature near the reference values. The modified Z–A and A-type constitutive models can give better fitting results than the J–C model. While, at high strains, the predictive values of the modified Z–A model have larger errors than those at low strains, which means this model has limitations at high strains. By comparison, the A-type model could predict the experimental results accurately at the whole strain range, which indicates that it is a more suitable choice to describe the flow behavior of the SnSbCu alloy in the focused range of strain rates and temperatures. The work is beneficial to solve the tribological problem of the bearing of the marine engine by integrating the accurate constitutive model into the corresponding numerical model.
Highlights
The SnSbCu alloy are preferred as the surface material in engine bearings for its good compliance, embeddedness, and anti-seizure property [1,2,3]
ItIt shows shows that that the the true true stress stressincreases increases with the rise of the true strain at a specific temperature and strain rate as expected, while it decreases with the rise of the true strain at a specific temperature and strain rate as expected, while it decreases significantly significantlyat atthe thesame samestrain strainas asthe thetemperature temperaturechanges changesin inaaspecific specificstrain strainrate ratecase, case,which whichmeans means the thetemperature temperature has has aa strong strong effect effecton onthe theflow flowbehavior behaviorof ofthe theSnSbCu
Inaddition, addition, the thestress stressgap gapbetween betweentwo two strain asas thethe strain raterate becomes smaller, which demonstrates that the hardening effect strainrates ratesgets getslarger larger strain becomes smaller, which demonstrates that the hardening enhances at smaller strain rates
Summary
The SnSbCu alloy are preferred as the surface material in engine bearings for its good compliance, embeddedness, and anti-seizure property [1,2,3]. Niu et al [48] used the A-type constitutive model to take the incorporated influence of the strain rate and temperature into account by the experimental data to describe the compression deformation behavior of lead-free solders. Zener–Hollomon parameter predict the deformation behaviorand at a strain high temperature for the 42CrMo different materials at the to different range of temperatures rates to describe the flow and alloy D9 et al [48] used the A-type constitutive modelalloy to take the incorporated behaviors. Comparison results, the suitability of of thethe three models is corrosion-resistant alloy bythe establishing the A-type model overabsolute the strain rate range evaluated by calculating correlationits coefficient and average relative error.of 0.001–1 s−1 at a high temperature
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