Mechanical properties assessment of additively manufactured Ti64 alloy using small punch tests

ABSTRACT

A study of the mechanical properties of Ti64 alloy through Small Punch Test is presented in this paper. The method and the validity of the correlation coefficients developed for nuclear steels are first verified on wrought alloy and then applied to additive manufactured material. The yield strength values obtained agree with the literature and domains of negative strain rate sensitivity could be highlighted for the microstructure resulting from additive manufacturing. The creep tests carried out showed good agreement between the present results and those reported in the literature on usual creep representations. This allows to validate the models used and to extend the small punch methods to the case of titanium alloys. The results are used for comparing the mechanical behaviour of additive manufactured Ti64 alloy to that of wrought alloys.

KEYWORDS:

• Ti64
• small punch test (SPT)
• additive manufacturing
• creep
• strain rate sensitivity (SRS)
• tensile testing

Disclosure statement

No potential conflict of interest was reported by the author(s).