A Numerical Approach to Investigate the Effect of Temperature on Constraint Factor of Ti Alloy Under Static Indentation Conditions

摘要

Abstract Temperature dependence of constraint factor i.e. the ratio of static indentation hardness to uniaxial flow stress was studied for Ti–6Al–4V from RT to 673?K using FEA. Surface-to-surface contact with finite sliding, which was used to model the interaction between spherical indenter/test specimen and the constitutive equations were then applied in axi-symmetric FE model. The results obtained from numerical analysis were in good agreement with the modified Expanding Cavity Model. Meyer’s hardness increased with average strain and strain hardening index increased from 0.19 to 0.21 with rise in temperature.