| Texto completo | |
| Autor(es): |
Silva, L. S.
;
Opini, V. C.
;
Sangali, M.
;
Rodrigues, J. F. Q.
;
Caram, R.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. N/A, p. 11-pg., 2025-04-12. |
| Resumo | |
This study employed thermo-analytical tools at different thermally treated samples to evaluate omega and alpha phase transformations in the Ti-5553 alloy. The omega dissolution and alpha precipitation were studied utilizing simultaneous thermal analysis (STA), X-ray diffraction (XRD), dilatometry, Vickers hardness measurement, optical microscopy, and scanning electron microscopy. Besides conventional XRD, in situ experiments were performed using a synchrotron light source. Considering the beta-quenched condition as the initial state, five different phase transformations were detected, which include the omega precipitation and dissolution between 420 and 670 K (the low intensity of the omega dissolution thermal event required studying different aging treatments), and the alpha precipitation in three different mechanisms above 670 K. The aging at 573 K for 72 h allowed better detection of the omega dissolution event and was revealed to be an important experimental approach for phase transformations study. A contrast among in situ XRD, STA, and dilatometry techniques was verified in the thermal behavior of beta-quenched and aged Ti-5553 alloy. The aging thermal treatments allowed the detection of omega phase dissolution by in situ XRD using a Cu K alpha source, which was not achieved even using a synchrotron light source in the not-aged condition. These results exemplify the potential of experimental exploitation through thermo-analytical techniques and thermal treatments. (AU) | |
| Processo FAPESP: | 18/18293-8 - Ligas de titânio: transformações de fases e manufatura aditiva aplicadas na obtenção de materiais com gradientes funcionais |
| Beneficiário: | Rubens Caram Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 23/04844-0 - Fabricação de componentes com gradientes funcionais por deposição |
| Beneficiário: | Leandro Santos da Silva |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |