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LOW-CYCLE FATIGUE OF THE SECOND GENERATION DIRECTIONALLY SOLIDIFIED SUPERALLOY

ZHANG ShiChao / LI Li / HOU XueQin

The total strain-controlled low cycle fatigue（ LCF） behaviors of a directionally solidified（ DS） superalloy DZ406 at 950℃ and 1000℃ for R = 0. 05 were investigated. The results of LCF tests indicated that mean stress relaxation occurred under asymmetric straining. The rate of mean stress relaxation increased with the increasing of strain amplitude. All the LCF data obtain under various ratios were well correlated by a modified SWT approach for lifetime prediction,the all data fell into the factor of 3 scatter band. With the increasing of strain amplitude it appeared muti-fatigue crack initiations.

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LOW-CYCLE FATIGUE OF THE SECOND GENERATION DIRECTIONALLY SOLIDIFIED SUPERALLOY

ZHANG ShiChao / LI Li / HOU XueQin

The total strain-controlled low cycle fatigue（ LCF） behaviors of a directionally solidified（ DS） superalloy DZ406 at 950℃ and 1000℃ for R = 0. 05 were investigated. The results of LCF tests indicated that mean stress relaxation occurred under asymmetric straining. The rate of mean stress relaxation increased with the increasing of strain amplitude. All the LCF data obtain under various ratios were well correlated by a modified SWT approach for lifetime prediction,the all data fell into the factor of 3 scatter band. With the increasing of strain amplitude it appeared muti-fatigue crack initiations.

LOW-CYCLE FATIGUE OF THE SECOND GENERATION DIRECTIONALLY SOLIDIFIED SUPERALLOY

ZHANG ShiChao / LI Li / HOU XueQin

The total strain-controlled low cycle fatigue（ LCF） behaviors of a directionally solidified（ DS） superalloy DZ406 at 950℃ and 1000℃ for R = 0. 05 were investigated. The results of LCF tests indicated that mean stress relaxation occurred under asymmetric straining. The rate of mean stress relaxation increased with the increasing of strain amplitude. All the LCF data obtain under various ratios were well correlated by a modified SWT approach for lifetime prediction,the all data fell into the factor of 3 scatter band. With the increasing of strain amplitude it appeared muti-fatigue crack initiations.

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Title:

LOW-CYCLE FATIGUE OF THE SECOND GENERATION DIRECTIONALLY SOLIDIFIED SUPERALLOY

Contributors:

ZHANG ShiChao (author) / LI Li (author) / HOU XueQin (author)

Published in:

Jixie qiangdu, Vol 39, Pp 311-315 (2017)

Publication date:

2017

ISSN:

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Keywords:

DS superalloy , Low cycle fatigue , Strain ratio , Mean stress relaxation , Mechanical engineering and machinery , TJ1-1570 , Materials of engineering and construction. Mechanics of materials , TA401-492

Metadata by DOAJ is licensed under CC BY-SA 1.0

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