ISSN 2594-5327
59º Congresso anual — Vol. 59 , num. 1 (2004)
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The aim of this work is to study the elastic behavior of Ti-Nb-Zr alloys (Ti-8Nb-13Zr, Ti-13Nb-13Zr, Ti-18Nb-13Zr and Ti-41.1Nb-7.1Zr), which are developed to biomedical applications. These alloys were produced by arc melting under argon atmosphere. Mechanical characterization of these alloys is based on uniaxial tensile tests, which are carried out in a servo-hydraulic MST machine. The obtained curves are analyzed in terms of Ramberg-Osgood, revised by Hill, in the elastic region up to 0.2% of total strain. Ramberg-Osgood equation is used for studying these alloys, due to the occurrence of a non-linear stress-strain behavior in the elastic region. This study involves: initial elastic modulus, tangent modulus, secant modulus, proof stress and strain-hardening exponent (n) that controls the sharpness of the knee of the stress-strain curves. The results show that these alloys present different mechanical behavior in that region. Moreover, some of these alloys present a low proportional limit compared to yield strength, and the degree of non-linearity is quantified by the parameter (n).
The aim of this work is to study the elastic behavior of Ti-Nb-Zr alloys (Ti-8Nb-13Zr, Ti-13Nb-13Zr, Ti-18Nb-13Zr and Ti-41.1Nb-7.1Zr), which are developed to biomedical applications. These alloys were produced by arc melting under argon atmosphere. Mechanical characterization of these alloys is based on uniaxial tensile tests, which are carried out in a servo-hydraulic MST machine. The obtained curves are analyzed in terms of Ramberg-Osgood, revised by Hill, in the elastic region up to 0.2% of total strain. Ramberg-Osgood equation is used for studying these alloys, due to the occurrence of a non-linear stress-strain behavior in the elastic region. This study involves: initial elastic modulus, tangent modulus, secant modulus, proof stress and strain-hardening exponent (n) that controls the sharpness of the knee of the stress-strain curves. The results show that these alloys present different mechanical behavior in that region. Moreover, some of these alloys present a low proportional limit compared to yield strength, and the degree of non-linearity is quantified by the parameter (n).
Palavras-chave
mechanical properties, stress-strain behavior, Ti-Nb-Zr alloys
mechanical properties, stress-strain behavior, Ti-Nb-Zr alloys
Como citar
Schneider, Sergio; Schneider, Sandra Giacomin; Silva, Helena Marques da; Neto, Carlos de Moura.
THE STUDY OF THE NON-LINEAR STRESS-STRAIN BEHAVIOR IN Ti-Nb-Zr ALLOYS,
p. 1566-1573.
In: 59º Congresso anual,
São Paulo, Brasil,
2004.
ISSN: 2594-5327, DOI 10.5151/2594-5327-3836
