Mechanical behavior of Inconel 625 at elevated temperatures
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Inconel 625 is a nickel-based alloy that is mainly used in high-temperature applications.
Inconel 625 exhibits an unstable plastic flow at elevated temperatures characterized by serrated
yielding, well-known as the Portevin-Le Chatelier effect. The evaluation of the mechanical properties
of Inconel 625 at high temperatures is the aim of this work. The tensile tests were executed in
temperatures ranging from room temperature to 1000 C with strain rates of 2 104 to 2 103 s1.
The creep tests were executed in the temperature range of 600–700 C and in the stress range of
500–600 MPa in a constant load mode. The optical and scanning electron microscopes were used for
surface fracture observation. In the curves obtained at 200–700 C the serrated stress-strain behavior
was observed, which was related to the dynamic strain aging effect. The yield strength and the
elongation values show anomalous behavior as a function of the test temperature. An intergranular
cracking was observed for a specimen tensile tested at 500 C that can be attributed to the decohesion
of the carbides along the grain boundaries. The fracture surface of the specimen tensile tested at
700 C showed the predominance of transgranular cracking with tear dimples with a parabolic shape.
Como referenciar
OLIVEIRA, MAURO M. de; COUTO, ANTONIO A.; ALMEIDA, GISELE F.C.; REIS, DANIELI A.P.; LIMA, NELSON B. de; BALDAN, RENATO. Mechanical behavior of Inconel 625 at elevated temperatures. Metals, v. 9, n. 3, p. 1-13, 2019. DOI: 10.3390/met9030301. Disponível em: http://repositorio.ipen.br/handle/123456789/29998. Acesso em: 27 Mar 2026.
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.