The metallurgical background to rejuvenation heat treatments and weld reparability procedures for gas turbine sheet metal components

Storey, Ian. J.; Klarstrom, D. L.; Hoback, Gregory L.; Ishwar, Venkat R.; Qureshi, Javaid I.

doi:10.1179/mht.2001.026

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Service-induced microstructural degradation and subsequent restoration of mechanical properties through heat treatments has been receiving considerable attention in recent years, in superalloys such as Inconel Õ 625 [7 -10] and Haynes 230 [12]. Complete recovery of the tensile strength and ductility [7,9] and of the creep rupture strength and creep ductility [10] upon re-solutionising of the alloy exposed to long-term service was attributed to the dissolution of the aforementioned embrittling phases.…”

Section: Influence Of Microstructurementioning

confidence: 99%

Influence of re-solutionising treatment on the cyclic deformation behaviour of a service-exposed Inconel^®625 superalloy

Nagesha

Kumar²,

Sandhya

et al. 2012

Materials at High Temperatures

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Cast Inconel Õ1 625 ammonia cracker tubes were received as virgin and service-exposed (117,000 h at temperatures in the range, 873 -953 K and a pressure of approximately 14 MPa) conditions. Low cycle fatigue behaviour of the virgin and service-exposed alloys was investigated under stress controlled cycling. The service-exposed material was subjected to a re-solutionising treatment at 1433 K for 2 h prior to testing. Tests were conducted using an R-ratio of 0 at various stress ranges. It was observed that the re-solutionised material displayed a better LCF resistance compared to the virgin material.

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Section: Influence Of Microstructurementioning

confidence: 99%

Influence of re-solutionising treatment on the cyclic deformation behaviour of a service-exposed Inconel^®625 superalloy

Nagesha

Kumar²,

Sandhya

et al. 2012

Materials at High Temperatures

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Evaluation and Characterization of Iron- and Nickel-Based Alloys for Microturbine Recuperators

Trejo

Maziasz

et al. 2005

Volume 1: Turbo Expo 2005

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The effects of stress, temperature and time of exposure to microturbine exhaust gases on the mechanical properties and corrosion resistance of alloys HR-120® and 230® was investigated at turbine exhaust temperatures between 620°C and 760°C. It was found that the ultimate tensile strength and ductility of alloy 230® decreased by 30% and 60%, respectively, after 500 hours exposure at 752°C. At the lowest exposure temperature of 679°C the ultimate tensile strength and ductility decreased by 10% and 25%, respectively. The ultimate tensile strength and ductility of HR-120® alloy decreased by 15% and 50%, respectively, after 500 hours exposure at 745°C. At the lowest exposure temperature of 632°C the ultimate tensile strength and ductility decreased by 10% and 23%, respectively. The microstructural changes associated with exposure to microturbine exhaust gases are analyzed and discussed.

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Effects of cyclic operation on advanced energy conversion systems

Starr

2003

Materials at High Temperatures

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The metallurgical background to rejuvenation heat treatments and weld reparability procedures for gas turbine sheet metal components

Cited by 3 publications

References 3 publications

Influence of re-solutionising treatment on the cyclic deformation behaviour of a service-exposed Inconel^®625 superalloy

Influence of re-solutionising treatment on the cyclic deformation behaviour of a service-exposed Inconel^®625 superalloy

Evaluation and Characterization of Iron- and Nickel-Based Alloys for Microturbine Recuperators

Effects of cyclic operation on advanced energy conversion systems

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The metallurgical background to rejuvenation heat treatments and weld reparability procedures for gas turbine sheet metal components

Cited by 3 publications

References 3 publications

Influence of re-solutionising treatment on the cyclic deformation behaviour of a service-exposed Inconel®625 superalloy

Influence of re-solutionising treatment on the cyclic deformation behaviour of a service-exposed Inconel®625 superalloy

Evaluation and Characterization of Iron- and Nickel-Based Alloys for Microturbine Recuperators

Effects of cyclic operation on advanced energy conversion systems

Contact Info

Product

Resources

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Influence of re-solutionising treatment on the cyclic deformation behaviour of a service-exposed Inconel^®625 superalloy

Influence of re-solutionising treatment on the cyclic deformation behaviour of a service-exposed Inconel^®625 superalloy