Dynamic Strain Aging in Co-33Ni-20Cr-10Mo Superalloy

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Kartika, Ika; Chiba, Akihiko, 2018, "Dynamic Strain Aging in Co-33Ni-20Cr-10Mo Superalloy", https://hdl.handle.net/20.500.12690/RIN/6MKR58, RIN Dataverse, V1

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Description

In the present study, hot deformation characteristic in Co-33Ni-20Cr-10Mo superalloy was carried out by using hot compression test in the temperature range from 700-900 ºC and strain rates ranging from 0.01-30 s–1 with a constant strain 0.5. The flow curves showed high work hardening rate at those temperatures. At temperatures 700-750 ºC, the 0.2 persen flow stress decreased with increasing strain rate, while at temperatures 800-850 ºC, the 0.2 persen flow stress is independent of a strain rate. Negative strain rate sensitivity was obtained at temperatures 700-900 ºC, suggesting the dislocation solute interaction occurred in those temperature ranges. The stacking fault energy was calculated on the basis of a thermodynamic model and was discussed in relation with DSA. DSA come from Suzuki segregation; chemical interaction between solute atoms and stacking faults bonded by the shockley partials. DSA is categorized as one of catastrophic phenomena in hot working process of Co-33Ni-20Cr-10Mo superalloy.

Proceeding of International Seminar on Applied Technology, Science and Arts (3rd APTECS)

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Chemistry


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Dataset Persistent ID	hdl:20.500.12690/RIN/6MKR58
Publication Date	2018-04-10
Title	Dynamic Strain Aging in Co-33Ni-20Cr-10Mo Superalloy
Author	Kartika, Ika (Pusat Penelitian Metalurgi dan Material) Chiba, Akihiko
Contact	Use email button above to contact. Kartika, Ika (Pusat Penelitian Metalurgi dan Material)
Description	In the present study, hot deformation characteristic in Co-33Ni-20Cr-10Mo superalloy was carried out by using hot compression test in the temperature range from 700-900 ºC and strain rates ranging from 0.01-30 s–1 with a constant strain 0.5. The flow curves showed high work hardening rate at those temperatures. At temperatures 700-750 ºC, the 0.2 persen flow stress decreased with increasing strain rate, while at temperatures 800-850 ºC, the 0.2 persen flow stress is independent of a strain rate. Negative strain rate sensitivity was obtained at temperatures 700-900 ºC, suggesting the dislocation solute interaction occurred in those temperature ranges. The stacking fault energy was calculated on the basis of a thermodynamic model and was discussed in relation with DSA. DSA come from Suzuki segregation; chemical interaction between solute atoms and stacking faults bonded by the shockley partials. DSA is categorized as one of catastrophic phenomena in hot working process of Co-33Ni-20Cr-10Mo superalloy. Proceeding of International Seminar on Applied Technology, Science and Arts (3rd APTECS)
Subject	Chemistry
Depositor	Medina, Dyta
Deposit Date	2018-04-10

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