| Full text | |
| Author(s): |
da Silva, Erenilton Pereira
;
Batista, Larissa Fernandes
;
Callegari, Bruna
;
Buzolin, Ricardo Henrique
;
Warchomicka, Fernando
;
Requena, Guillermo Carlos
;
Brito, Pedro Paiva
;
Pinto, Haroldo Cavalcanti
Total Authors: 8
|
| Document type: | Journal article |
| Source: | MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 17, n. 6, p. 6-pg., 2014-11-01. |
| Abstract | |
Rare earth elements reportedly improve high temperature strength and creep resistance of Mg alloys. In the present work, ZK60 Mg alloys containing different amounts (0.5, 1.5 and 2.5 wt.%) of rare earth additions were prepared by thixocasting and submitted to solution and ageing heat treatments (T4, T5 and T6). The as-cast and heat treated microstructures were investigated by scanning electron microscopy and hardness was evaluated as a function of heat treatment parameters. In the as-cast state, the alloys are formed by globular a-Mg grains reinforced by a network of composite Mg-Zn-RE precipitates with either smooth or lamellar/acicular morphologies. Solution of the smooth precipitates took place in alloys containing 0.5 and 1.5wt.% RE for T4-500 degrees C but no precipitates were dissolved with T4-380 degrees C. The optimum temperature for T5 and T6 was identified as 175 degrees C, while T6-500 degrees C led to the highest hardness, followed by T5 and T6-380 degrees C, respectively. (AU) | |
| FAPESP's process: | 11/09324-8 - Friction stir welding of thixocast high performance magnesium alloys |
| Grantee: | Erenilton Pereira da Silva |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 10/11391-2 - Friction stir welding of thixocast high performance magnesium alloys |
| Grantee: | Haroldo Cavalcanti Pinto |
| Support Opportunities: | Research Grants - Young Investigators Grants |