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Referencia 1369 |
| Título: |
Agrietamiento en aleaciones de titanio producidas por hidrógeno |
| Título original: |
Hydrogen cracking in titanium-based alloys |
| Autor: |
Tal-Gutelmacher, E Eliezer, D |
| Resumen: |
In this paper the phenomena of hydrogen cracking and hydrogen-induced second phases formation in titanium based alloys is discussed in detail, addressing to three different alloys; the alpha + beta Ti-6Al-4V alloy, the metastable Beta-21S and the Ti-20 wt.%Nb refractory alloy. The prior microstructure of the alloy plays a very significant role on its behavior under exposure to a hydrogen-containing environment. In the Ti-6Al-4V alloy the main mechanism of hydrogen cracking is the formation and rupture of brittle titanium hydride phases. The severity of hydrogen degradation in the Ti-6Al-4V alloy depends on the amount and distribution of the beta phase in the microstructure due to a more rapid diffusion transport of hydrogen in the bcc beta phase. On the other hand, the Timetal Beta-21S beta alloy, exposed to the electrochemical (high fugacity) hydrogen environment at room temperature, exhibits a fair resistance to hydrogen. In the Ti-20 wt.%Nb alloy hydrogen-induced phase! transitions and hydrides formation were followed by an interesting softening effect, irrespective of the charging procedure. |
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| Idioma: |
Inglés |
País: |
Israel |
Año: |
2005 |
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| Tipo: |
Artículo |
| Área: |
Materiales y Materias primas > Aleaciones ligeras (aluminio, titanio, magnesio...)
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| Subsectores de aplicación: |
· Maquinaria y bienes de equipo
· Automoción e industria auxiliar
· Fabricación de productos metálicos, excepto maquinaria y equipo
· Tratamientos superficiales y térmicos
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| Entidad: |
Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva. |
| Fuente: |
JOURNAL OF ALLOYS AND COMPOUNDS |
| Localización en fuente: |
Vol. 404, pág. 621-625 |
| Descriptores: |
titanium alloys, aleaciones de titanio, agrietamiento, cracking, hidruros, hydrides, Ti-6Al-4V, Beta-21S, Ti-Nb alloys, Ti-Nb aleaciones, fragilización por hidrogeno, hydrogen embrittlement; hydrogen induced cracking; agrietamiento inducido por hidrogeno; corrosion |
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