Influence of heat treatment on structure and oxidation behavior of Zr-2 5Nb
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Journal of Testing and Evaluation
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This paper presents the influence of different heat treatments
on the microstrueture and isothermal oxidation behavior of Zr-
2.5Nb in oxygen. The quenched structure consisted of martensitic c~'.
Upon tempering the quenched alloy at 500°C for up to 100 h, /3Nb precipitated
in the matrix, at twin and c¢' needle boundaries. At higher
tempering temperatures and after longer periods, Nb-rich/3Zr also precipitated.
Specimens slowly cooled from the/3-phase showed the least
resistance to oxidation. The oxidation behavior also varied with the
tempering time and temperature. The increased oxidation rate of specimens
tempered at 500°C for 1000 h or at 600°C, as compared to those
tempered at 500°C for shorter times, has been attributed to formation
of Nb containing oxides on the coalesced Nb-rich precipitates and to
cracking.
Como referenciar
RAMANATHAN, L.V.; COSTA, I.; MONTEIRO, W.A. Influence of heat treatment on structure and oxidation behavior of Zr-2 5Nb. Journal of Testing and Evaluation, v. 17, n. 3, p. 172-180, 1989. Disponível em: http://repositorio.ipen.br/handle/123456789/26728. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.