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Effects of Thermal Exposure on Low Cycle Fatigue Behavior of Ti600 Titanium Alloy

Journal Advanced Materials Research (Volumes 118 - 120)
Volume Materials and Product Technologies II
Edited by L.Y. Xie, M.N. James, Y.X. Zhao and W.X. Qian
Pages 611-615
DOI 10.4028/www.scientific.net/AMR.118-120.611
Citation Teng Yu et al., 2010, Advanced Materials Research, 118-120, 611
Online since June, 2010
Authors Teng Yu, Lei Wang, Yong Qing Zhao, Yang Liu
Keywords Cyclic Stress Response, Low Cycle Fatigue, Thermal Exposure, Ti600 Titanium Alloy, α2 Phase
Abstract

Effects of thermal exposure on low cycle fatigue behavior of Ti600 alloy were investigated by LSCM, SEM and TEM. The results demonstrated that both the NTE specimens and the TE specimens showed the cyclic softening, within a total strain amplitude range from ±0.45% to ±1.00%. Since the α2 phase precipitated in the αp phase during thermal exposure, the resistance of fatigue crack propagation of αp phase could be increased by the precipitation of α2 phase. Therefore, the low cycle fatigue (LCF) lives of Ti600 alloy after thermal exposure were longer than those without thermal exposure, at the same total strain amplitude.

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