ISSN 2594-5327
68º Congresso da ABM — vol. 68, num.68 (2013)
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Creep phenomenonduring few past decadeshas its importance raised especially due to the increase of working temperature in aerospace and land based turbines.This study aimsto characterize the fracture of the superalloyInconel718doubleaged after creep experiments at 650oC and 675ºCwith load of625MPa. A solid solution of 1095ºC for 1 hour treatment (air cooling) was applied initially and followed by double aging treatment at 955°C/1h (air cooling) - 720ºC/6.5h +720ºC/1.5h (furnace cooling) + 620ºC/8h (air cooling). The Inconel 718 double aged presented higher creep resistance than the Inconel 718 as received. The lower values of true strain in the alloy after double aging demonstrated that the heat treatment was more effective and increased the mechanical properties at high temperature. The creep testswere performed accordingto ASTME139-06 at650oC and 675ºC and constant load of 625MPa. The fracture characterization was done in the samples aftercreep testsunder all conditionstested. It was observed intergranular fractures after creep tests.
Creep phenomenonduring few past decadeshas its importance raised especially due to the increase of working temperature in aerospace and land based turbines.This study aimsto characterize the fracture of the superalloyInconel718doubleaged after creep experiments at 650oC and 675ºCwith load of625MPa. A solid solution of 1095ºC for 1 hour treatment (air cooling) was applied initially and followed by double aging treatment at 955°C/1h (air cooling) - 720ºC/6.5h +720ºC/1.5h (furnace cooling) + 620ºC/8h (air cooling). The Inconel 718 double aged presented higher creep resistance than the Inconel 718 as received. The lower values of true strain in the alloy after double aging demonstrated that the heat treatment was more effective and increased the mechanical properties at high temperature. The creep testswere performed accordingto ASTME139-06 at650oC and 675ºC and constant load of 625MPa. The fracture characterization was done in the samples aftercreep testsunder all conditionstested. It was observed intergranular fractures after creep tests.
Palavras-chave
Superalloys;Fouble-aged; Inconel 718;Creep test.
Superalloys;Fouble-aged; Inconel 718;Creep test.
Como citar
Candioto, Kátia Cristiane Gandolpho;
Caliari, Felipe Rocha;
Reis, Danieli Aparecida Pereira;
Couto, Antonio Augusto;
Neto, Carlos de Moura;
Nunes, Carlos Ângelo.
CHARACTERIZATION OF FRACTURE OF SUPERALLOY INCONEL 718DOUBLE AGED AFTER CREEP TESTS AT650°C AND 675ºC
,
p. 2523-2528.
In: 68º Congresso da ABM,
São Paulo,
2013.
ISSN: 2594-5327
, DOI 10.5151/2594-5327-23271
