首页|Investigation on the Very High Cycle Fatigue Life of Titanium Alloys by Near-β Forging and Shot Peening

Investigation on the Very High Cycle Fatigue Life of Titanium Alloys by Near-β Forging and Shot Peening

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Investigation on the Very High Cycle Fatigue Life of Titanium Alloys by Near-β Forging and Shot Peening
In order to enhance the fatigue properties of metallic materials,a feasible rationale is to delay or prevent the interior and surface fatigue crack initiation.Based on this rationale,the study investigates the approach of improving the very high cycle fatigue properties of TC6 titanium alloys through near-β forging coupled with shot peening,conducted at 930 ℃ and ambient temperature,respectively.To unveil the associated mechanisms,microstructure,microhardness,residual stress,and fatigue properties are thoroughly analyzed after each process.Results indicate a considerable refinement in microstructure and significant mitigation of the initially existed strong texture post near-β forging and annealing,efficiently delaying crack initiation and propagation.As a result,the very high cycle fatigue property of TC6 achieves remarkable enhancement after forging.Compared to near-β forging,shot peening might not necessarily improve the very high cycle fatigue performance,particularly beyond 106 cycles.

Titanium alloyNear-β forgingShot peeningFatigue lifeVery high cycle fatigue

Qiangang Xu、Yonghui Chen、Kai Pan、Xingwei Xu、Fei Zhao、Kai Guo、Xiaotao Liu、Zhen Zhang

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Department of Engineering Mechanics,School of Aerospace Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

National Key Laboratory of Strength and Structural Integrity,Aircraft Strength Research Institute of China,Xi'an 710065,China

Chinese Aeronautical Establishment,Beijing 100012,China

AECC Chengdu Engine Co.,Ltd,Chengdu 610503,China

State Key Laboratory of Materials Processing and Die &Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment,1037 Luoyu Road,Wuhan 430074,China

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Titanium alloy Near-β forging Shot peening Fatigue life Very high cycle fatigue

2024

10.1007/s10338-024-00509-0

固体力学学报(英文版)
中国力学学会

固体力学学报(英文版)

EI
影响因子：0.214
ISSN：0894-9166
年,卷(期)：2024.37(6)