1. Department of Materials Engineering, Universidade Federal do Rio Grande do Norte (UFRN), 59072-970 Natal — RN, Brazil
2. Department of Mechanical Engineering, Universidade de Brasília, UnB, Asa Norte, 70910-900 Brasília — DF, Brazil,
3. Department of Mechanical Engineering, Universidade de Brasília, UnB, Asa Norte, 70910-900 Brasília — DF, Brazil