The hot deformation behaviour of in situ Ti-based composite, namely Ti-10Al-3.8Zr-1.3Si, was studied in the present work. The material plasticity and ductility was evaluated by means of hot torsion tests performed in the temperature and strain rate ranges of 950-1000 degrees C and 5 x 10(-1)-10(-3) s(-1), respectively. TEM observations were performed on the as-cast and after homogenisation deformation in order to observe the microstructural behaviour and to observe the formation of reinforcing phases. Optical and SEM studies revealed that the material consists of alpha'-lamellas with beta-phase layers along their boundaries and secondary nanometric silicides of TiAlx(Si, Zr)(y) composition. (c) 2005 Elsevier Ltd. All rights reserved.
HOT FORMING BEHAVIOUR OF TI–AL–ZR–SI ‘‘IN SITU’’ METAL MATRIX COMPOSITE BY MEANS OF HOT TORSION TESTS / Cavaliere, P; EL MEHTEDI, Mohamad; Evangelista, E; Kuzmenko, N; Vasylyev, O.. - In: COMPOSITES. PART A: APPLIED SCIENCE AND MANUFACTURING. - ISSN 1359-835X. - STAMPA. - 37:10(2006), pp. 1514-1520. [10.1016/j.compositesa.2005.11.008]
HOT FORMING BEHAVIOUR OF TI–AL–ZR–SI ‘‘IN SITU’’ METAL MATRIX COMPOSITE BY MEANS OF HOT TORSION TESTS
EL MEHTEDI, Mohamad;
2006-01-01
Abstract
The hot deformation behaviour of in situ Ti-based composite, namely Ti-10Al-3.8Zr-1.3Si, was studied in the present work. The material plasticity and ductility was evaluated by means of hot torsion tests performed in the temperature and strain rate ranges of 950-1000 degrees C and 5 x 10(-1)-10(-3) s(-1), respectively. TEM observations were performed on the as-cast and after homogenisation deformation in order to observe the microstructural behaviour and to observe the formation of reinforcing phases. Optical and SEM studies revealed that the material consists of alpha'-lamellas with beta-phase layers along their boundaries and secondary nanometric silicides of TiAlx(Si, Zr)(y) composition. (c) 2005 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
