Influence of the deformation rate on phase stability and mechanical properties of a Ti-29Nb-13Ta-4.6Zr-xO alloy analyzed by in situ high-energy X-ray diffraction during compression tests

Autor(es)

da Silva, Murillo R. ^{[1, 2]} ; Gargarella, Piter ^{[3, 1]} ; Plaine, Athos H. ^[4] ; Contieri, Rodrigo J. ^[5] ; Pauly, Simon ^[6] ; Kuehn, Uta ^[2] ; Bolfarini, Claudemiro ^{[3, 1]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, BR-13565905 Sao Carlos, SP - Brazil

^[2] IFW Dresden, Inst Complex Mat, D-01069 Dresden - Germany

^[3] Univ Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

^[4] State Univ Santa Catarina UDESC, Dept Mech Engn, BR-89223100 Joinville, SC - Brazil

^[5] Univ Estadual Campinas, Sch Appl Sci, UNICAMP, BR-13083970 Campinas, SP - Brazil

^[6] Univ Appl Sci Aschaffenburg, Fac Engn, D-63743 Aschaffenburg - Germany

• Tipo de documento: Artigo Científico
• Fonte: Journal of Materials Research; v. 35, n. 14, p. 1777-1789, JUL 28 2020.
• Citações Web of Science: 0

Resumo

In this work, a Ti-29Nb-13Ta-4.6Zr-xO Gum Metal with two significantly different oxygen levels (388 and 3570 ppm) was investigated during deformation. The alloys were compressed during in situ high-energy X-ray diffraction using three different strain rates, 10(-4), 10(-3), and 10(-1) s(-1), in order to evaluate their influence on phase stability and mechanical properties. The influence of oxygen on the deformation process was also studied. Deformation takes place by twinning, stress-induced, and reverse martensitic transformation and was observed, for some samples, a spinodal decomposition of the beta-phase during elastic deformation. The mechanical properties were similar for the different rates employed when considering the same oxygen level. The alloy with a higher amount of oxygen, however, showed a substantial increase in mechanical strength, with a yield strength of around 680 MPa, which is more than three times higher than for the specimen with 388 ppm of oxygen. (AU)

• Processo FAPESP: 13/05987-8 - Processamento e caracterização de ligas metálicas amorfas, metaestáveis e nano-estruturadas
• Beneficiário: Claudio Shyinti Kiminami
• Modalidade de apoio: Auxílio à Pesquisa - Temático