Creep behaviour of as received, aged and cold worked INCONEL 617 at 850°C and 950°C

Chomette, Sébastien; Gentzbittel, J.M.; Viguier, Bernard

doi:10.1016/j.jnucmat.2010.01.019

Cited by 86 publications

(36 citation statements)

References 10 publications

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“…Hardness testing was also performed on the four crept samples and the average hardness is shown in Table 4. The high temperature exposure causes the as-received microstructure to evolve [9][10][11][12][16][17][18][19][20][21][22]. With the exception of µ phase, which only precipitates in the samples exposed at temperatures equal or higher than 700ºC, MX, M 23 C 6 , M 6 C and γ' are encountered in all the crept samples.…”

Section: Microstructural Analysis Of Alloy In617 Crept Specimensmentioning

confidence: 99%

Characterisation of microstructure and creep properties of alloy 617 for high-temperature applications

Martino

Faulkner

Hogg

et al. 2014

Materials Science and Engineering: A

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Current energy drivers are pushing research in power generation materials towards improved efficiency and improved environmental impact. In the context of new generation ultra-supercritical (USC) power plant , this is represented by increased efficiency, service temperature reaching 750 o C, pressures in the range of 35 -37.5 MPa and associated carbon capture technology. Ni base alloys are primary candidate materials for long term high temperature applications such as boilers. The transition from their current applications, which have required lower exposure times and milder corrosive environments, requires the investigation of their microstructural evolution as a function of thermo-mechanical treatment and simulated service conditions, coupled with modelling activities that are able to forecast such microstructural changes. The lack of widespread microstructural data in this context for most nickel base alloys makes this type of investigation necessary and novel. Alloy INCONEL 617 is one of the Ni-base candidate materials. The microstructures of four specimens of this material crept at temperatures in the 650 o C-750 o C range for up to 20000 h have been characterised and quantified. Grain structure, precipitate type and location, precipitate volume fraction, size and inter-particle spacing have been determined. The data obtained are used both as input for and validation of a microstructurally-based CDM model for forecasting creep properties.

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Section: Microstructural Analysis Of Alloy In617 Crept Specimensmentioning

confidence: 99%

Characterisation of microstructure and creep properties of alloy 617 for high-temperature applications

Martino

Faulkner

Hogg

et al. 2014

Materials Science and Engineering: A

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show abstract

“…M. Akbari-Garakani et al [2] reported the formation of continuous network of M23C6 carbides along grain boundaries on exposed materials which facilitated grain boundary sliding easily and resulted in a decreased creep life compared to new materials. M. Cabibbo et al [3] also observed similar type of the M23C6 carbides along grain boundaries which contribute to the formation of film morphology. Then, grain boundary sliding occurred and caused creep rupture.…”

Section: Introductionmentioning

confidence: 76%

“…[1][2][3]. It is well-known that M23C6 carbide network is formed along grain boundaries during long-term exposure at elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Properties of INCONEL 617 Investigated in Accelerated Creep Testing

Phuraya¹,

Phung-On²,

Srithorn³

2017

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Abstract. An accelerated creep test was implemented to study the effects of heat treatment on the creep properties of INCONEL 617. Three heat treatment conditions were set on the test specimens, including 1) as-received, 2) aged as the simulation of service conditions at 650°C for 1,000 h and 3) solutionised. The accelerated creep test was performed at 700, 750, 800 and 900°C with applied stress at 80% and 90% of the yield stress (YS) at tested temperatures. The results were analysed for both time to rupture and % RA, which showed that there was a significant drop in time to rupture and % RA at 750°C. Subsequently, the % RA increased while the time to rupture gradually decreased. The Larson Miller curve for all heat treatment conditions could be plotted with an interest in the presence of an intersection zone. This indicated the possibility of failure behaviour changes from a creep mode to an overload mode at low applied loads to high applied loads, respectively.

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“…In addition, most of creep tests in the previous papers were conducted at temperatures of 850 to 1000°C, which is much higher than the temperature conditions of A-USC. [18,19].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cold Working on Creep Rupture Strength of Alloy617

Shioda¹

2017

IJMSA

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Abstract:The effect of cold working on the creep rupture strength of Alloy617 was investigated. The creep rupture tests were conducted at temperatures of 700 to 800°C, under stresses from 100 to 350 MPa. At high stress conditions, the creep rupture time of the non-pre-strained samples are similar to those of the pre-strained samples. On the other hand, at low stress conditions, the creep rupture time of the pre-strained samples are longer than those of the non-pre-strained samples. The amount of precipitates near the grain boundaries in the pre-strained sample is higher than that in the non-pre-strained sample. Weak regions such as PFZ and recrystallization grains in the non-pre-strained sample are formed in the early stage of creep compared to the pre-strained sample. At low stress conditions, the precipitates near the grain boundaries in the pre-strained sample play an effective role to pin the grain boundaries and they delay the formation of the weak regions resulting in extension to the creep rupture time.

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Creep behaviour of as received, aged and cold worked INCONEL 617 at 850°C and 950°C

Cited by 86 publications

References 10 publications

Characterisation of microstructure and creep properties of alloy 617 for high-temperature applications

Characterisation of microstructure and creep properties of alloy 617 for high-temperature applications

Effect of Heat Treatment on Properties of INCONEL 617 Investigated in Accelerated Creep Testing

Effect of Cold Working on Creep Rupture Strength of Alloy617

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