Study of Mechanical Properties and Fracture Mechanism of a New High-Temperature Alloys

Dong Xu Zhang; Da Shun Liu; Xi Ping Zhu

doi:10.4028/www.scientific.net/AMM.271-272.64

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 271-272Study of Mechanical Properties and Fracture...

Study of Mechanical Properties and Fracture Mechanism of a New High-Temperature Alloys

Abstract:

GH3230 is a new type of superalloy,it is the first study about it. This paper studied the high temperature mechanical properties of the GH3230 base metal and argon-arc welding joints by high temperature tensile test,high temperature creep test and SEM analyses. The results showed thatthe ultimate tensile strength of GH3230 argon-arc welding joints is about 85.6% of that of base metal under the same conditions. In the high temperature creep test, GH3230 argon-arc welding joints had a longer creep life than that of base metal. Both GH3230 base metal and argon-arc welding joints showed a ductile fracture. High temperature tensile fracture is cavities fracture and high temperature creep fracture is intergranular fracture. The deformation of GH3230 argon-arc welding joints is much more uniformited and smaller than that of base material, and GH3230 argon-arc welding joints has less cracks.

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Periodical:

Applied Mechanics and Materials (Volumes 271-272)

Pages:

64-68

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.271-272.64

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Online since:

December 2012

Authors:

Dong Xu Zhang, Da Shun Liu, Xi Ping Zhu

Keywords:

Argon-Arc Welding, Fracture Surfaces Analysis, High Temperature Creep, High Temperature Tensile, Superalloy

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References

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