Tensile and Creep Strength of Thermally Exposed Allvac 718Plus

Pröbstle, M.; Neumeier, Steffen; Hünert, Daniela; Göken, Mathias

doi:10.1002/9781119016854.ch28

8th International Symposium on Superalloy 718 and Derivatives 2014

DOI: 10.1002/9781119016854.ch28

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Tensile and Creep Strength of Thermally Exposed Allvac 718Plus

M. Pröbstle

Steffen Neumeier

Daniela Hünert

et al.

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Cited by 3 publications

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The creep behavior of a disk superalloy under different stress conditions

Jia

Zhang

et al. 2018

Metal Powder Report

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Throughout this project, a candidate nickel-based turbine disk superalloy was prepared by spray forming process. After creep testing, samples were carried out at 705 °C/750 MPa, 705 °C/793 MPa and 705 °C/897 MPa. The microstructure and creep properties of the alloy were investigated using transmission electron microscope (TEM). The results show that the creep rate of the alloy was improved and the creep life decreased significantly when the stress increased from 750 MPa to 793 MPa and 897 MPa. According to the result, the alloy has high stress index. Furthermore, when the stress was as relatively low as 750 MPa or 793 MPa, the creep mechanism of the alloy was dislocation shearing into γ′ phases; when the stress was as high as 897 MPa, the creep mechanism was stacking faults and micro-twins cutting γ′ phases. Under different stress conditions, the tertiary creep has a significant impact on the total deformation quantity and creep life of the alloy and the rafting of γ′ phase is the main reason of the creep acceleration. With the increasing applied stress, rafting of γ′ phase becomes obvious and it accelerates the tertiary creep deformation but reduces the creep properties of the alloy.

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The creep behavior of a disk superalloy under different stress conditions

Jia

Zhang

et al. 2018

Metal Powder Report

View full text Add to dashboard Cite

show abstract

Superior creep strength of a nickel-based superalloy produced by selective laser melting

Pröbstle

Neumeier

Hopfenmüller

et al. 2016

Materials Science and Engineering: A

199

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Creep performance and damage mechanism for Allvac 718Plus superalloy

Chen

Dong

Yao

et al. 2018

Materials Science and Engineering: A

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Tensile and Creep Strength of Thermally Exposed Allvac 718Plus

Cited by 3 publications

References 16 publications

The creep behavior of a disk superalloy under different stress conditions

The creep behavior of a disk superalloy under different stress conditions

Superior creep strength of a nickel-based superalloy produced by selective laser melting

Creep performance and damage mechanism for Allvac 718Plus superalloy

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