Stacking fault energy measurements in solid solution strengthened Ni-Cr-Fe alloys using synchrotron radiation

Autor(es)

Unfried-Silgado, Jimy ^{[1, 2, 3]} ; Wu, Leonardo ^[1] ; Ferreira, Fabio Furlan ^[4] ; Mario Garzon, Carlos ^[5] ; Ramirez, Antonio J. ^[1]

Afiliação do(s) autor(es)

^[1] Brazilian Nanothecnol Natl Lab CNPEM ABTLuS, Met Characterizat & Proc Lab, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas UNICAMP, FEM, Campinas, SP - Brazil

^[3] Univ Autonoma Caribe, Grp IMTEF, Barranquilla - Colombia

^[4] Univ Fed ABC, CCNH, Sao Paulo - Brazil

^[5] Univ Nacl Colombia, Dept Fis, Bogota - Colombia

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 558, p. 70-75, DEC 15 2012.
• Citações Web of Science: 9

Resumo

The stacking fault energy (SFE) in a set of experimental Ni-Cr-Fe alloys was determined using line profile analysis on synchrotron X-ray diffraction measurements. The methodology used here is supported by the Warren-Averbach calculations and the relationships among the stacking fault probability (alpha) and the mean-square microstrain (<epsilon(2)(L)>). These parameters were obtained experimentally from cold-worked and annealed specimens extracted from the set of studied Ni-alloys. The obtained results show that the SFE in these alloys is strongly influenced by the kind and quantity of addition elements. Different effects due to the action of carbide-forming elements and the solid solution hardening elements on the SFE are discussed here. The simultaneous addition of Nb, Hf, and, Mo, in the studied Ni-Cr-Fe alloys have generated the stronger decreasing of the SFE. The relationships between SFE and the contributions on electronic structure from each element of additions were established. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 06/05661-1 - Estudo do mecanismo de fratura intergranular por queda de ductilidade em ligas Ni-Cr-Fe
• Beneficiário: Jimy Unfried Silgado
• Modalidade de apoio: Bolsas no Brasil - Doutorado