Low Cycle Fatigue Behavior of a Near-α Ti Alloy Containing Rare Earth Nd

Zhi Shou Zhu; Chun Xiao Cao; Ming Gao Yan

doi:10.4028/www.scientific.net/MSF.475-479.599

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HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Low Cycle Fatigue Behavior of a Near-α Ti Alloy...

Low Cycle Fatigue Behavior of a Near-α Ti Alloy Containing Rare Earth Nd

Abstract:

Low cyclic behavior of a new type near-α titanium alloy containing rare earth Nd (Ti60) with and without dwell time introduced at maximum tensile strain has been investigated at ambient temperature and 600°C. The results show that, Ti60 alloy exhibits a cyclic softening behavior at almost all strain levels being investigated. The cyclic processes show good agreement with predictions based on the fatigue crack propagation model. At 600°C, the LCF life of Nd-bearing near-α titanium alloy is superior to that at room temperature within the investigated strain range, which indicates that Ti60 alloy is a good candidate for high temperature component under complicated load and temperature conditions. The results also show that the creep-fatigue interaction is related to the strain range applied. The creep-fatigue fracture is characterized by transgranular fracture mode due to the formation of matrix voids induced by Nd-bearing particles.

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Periodical:

Materials Science Forum (Volumes 475-479)

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599-602

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.599

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Online since:

January 2005

Authors:

Zhi Shou Zhu, Chun Xiao Cao, Ming Gao Yan

Keywords:

Low Cycle Fatigue Behavior, Microstructure, TiAl

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