Aging precipitation behavior and mechanical properties of Inconel 617 superalloy

Yan, Guo; Wang, Bohan; Hou, Shuhua

doi:10.1007/s40195-012-0249-3

Cited by 65 publications

(16 citation statements)

References 11 publications

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“…The controllable yield strength is favorable for application of the present steel in materials for turbine casings and rotor forgings in the steam turbine of A-USC power plants. In addition, the aged specimens exhibited Charpy absorption energies ranging from 31 to 106 J/cm 2 at ambient temperature, which presents an adequate ductility compared with conventional austenitic heat-resistant alloys (e.g., alloy 617[31], alloy 740[32])…”

mentioning

confidence: 99%

Mechanical properties of austenitic heat-resistant Fe–20Cr–30Ni–2Nb steel at ambient temperature

Kanno

Yoshimura

Takata

et al. 2016

Materials Science and Engineering: A

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The mechanical properties of Fe-20Cr-30Ni-2Nb (at.%) steels with controlled microstructures were examined by conducting tensile tests and Charpy impact tests at room temperature. The solution-treated specimen (-Fe single-phase) exhibited a yield strength (y) of 210 MPa and a maximum tensile strength (UTS) of 850 MPa. Its rupture strain (r) was more than 40%. The specimen with high area fraction of the Fe 2 Nb Laves phase on the grain boundaries () exhibited a higher y of 276 MPa and adequate tensile ductility (r = 29%). The specimen with high-density precipitates of the Ni 3 Nb phase in the grain interior exhibited a much higher y. The value of y of Fe-20Cr-30Ni-2Nb steel can be controlled by changing the precipitation morphology in the grain interior. Fractographic observations demonstrate that ductile intragranular fracture occurred in all of the tested specimens. The absorption energy measured by the Charpy impact test decreased from 211 to 31 J/cm 2 as was increased from 0 to 89%. The fracture mode appeared to vary from ductile transgranular fracture to cleavage transgranular fracture with increasing. There was no indication of crack propagation within the precipitates of the Laves phase covering the grain boundaries or along the interface between-Fe and the Laves phase. Therefore, the Laves phase that precipitated on the grain boundaries would not have a negative effect on the room-temperature ductility.

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mentioning

confidence: 99%

Mechanical properties of austenitic heat-resistant Fe–20Cr–30Ni–2Nb steel at ambient temperature

Kanno

Yoshimura

Takata

et al. 2016

Materials Science and Engineering: A

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“…Additionally, many martensite and austenite islands (M/A) could be found in the bainite matrix, [6] which contributed to improving the toughness and ductility. [24][25][26] 3. Normalized and tempered steel Figure 4 shows the OM and SEM microstructures of the samples normalized at 880°C, 930°C, 980°C, and 1030°C for 1 hour and then tempered at 700°C for 50 minute.…”

Section: Normalized Steelmentioning

confidence: 99%

Microstructure and Properties of Fe-2Cr-Mo-0.12C (Wt Pct)-Tempered Steel Plate at Different Normalizing Temperature After Hot Rolling

Wang

et al. 2020

Metall Mater Trans A

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The microstructure and properties of a Fe-2Cr-Mo-0.12C (wt pct)-tempered steel plate at different normalization temperatures after hot rolling were investigated to enhance its comprehensive mechanical properties. The microstructure of the steel was mainly composed of a ferrite-bainite-tempered martensite mixture after the normalization-tempering process. The tensile properties and the ductile-brittle transition temperature values indicated that the best comprehensive mechanical properties can be obtained by normalizing at 930°C and tempering at 700°C. When the normalization temperature was 880°C to 930°C, the yield strength increased as the bainite and tempered martensite hard phase volume fractions increased. However, when the normalization temperature surpassed 980°C, the precipitation strength behavior compensated for the adverse influence of the effective grain size growth, and yield strength was nearly unchanged. Total elongation reached a peak value when normalized at 930°C , due to the optimal volume fraction ratio of the soft to hard phase. The Charpy impact fracture changed from a ductile to a brittle fracture with an increase in the normalization temperature. When the normalization temperature was 930°C, the existence of a certain volume fraction of nano-precipitates and soft ferrite in the microstructure contributed to excellent ductile properties.

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“…Although the tensile behaviors under different conditions and the microstructure evolution behavior of nickel-based 1 3 superalloys during thermal exposure have been widely studied [17][18][19][20][21][22][23], but the relevant research on the superalloys with high tungsten content are still less. On the other hand, the tensile behavior of the high W content superalloy after longterm thermal exposure is still not clear.…”

Section: Introductionmentioning

confidence: 99%

Effect of Long-Term Thermal Exposures on Tensile Behaviors of K416B Nickel-Based Superalloy

Chen

Xie

Shu

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The effect of long-term thermal exposure on the tensile behavior of a high W content nickel-based superalloy K416B was investigated. The microstructure and the deformation characteristics were observed by scanning electron microscopy and transmission electron microscopy, and the phase transformation of the alloy during long-term thermal exposure was analyzed by X-ray diffraction patterns and differential thermal analysis. Results showed that after thermal exposure at 1000 °C, the MC carbides in the K416B alloy decomposed into M 6 C. During tensile deformation, dislocations slipping in γ matrix crossed over the M 6 C by Orowan bowing mechanism. With the increase of thermal exposure time, the secondary M 6 C reduced greatly the yield strength of the alloy at room temperature. Meanwhile, the continuous distribution of the secondary M 6 C with great brittleness in the grain boundary could become the main source of crack, which might change the fracture characteristic of the alloy from trans-granular to intergranular.

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Aging precipitation behavior and mechanical properties of Inconel 617 superalloy

Cited by 65 publications

References 11 publications

Mechanical properties of austenitic heat-resistant Fe–20Cr–30Ni–2Nb steel at ambient temperature

Mechanical properties of austenitic heat-resistant Fe–20Cr–30Ni–2Nb steel at ambient temperature

Microstructure and Properties of Fe-2Cr-Mo-0.12C (Wt Pct)-Tempered Steel Plate at Different Normalizing Temperature After Hot Rolling

Effect of Long-Term Thermal Exposures on Tensile Behaviors of K416B Nickel-Based Superalloy

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