Fatigue crack growth under mixed mode I + II in Ti-6Al-4V specimens produced by Laser powder Bed fusion

被引：10

作者：

Jesus, J. S. ^{[1
]}

Borrego, L. P. ^{[1
,2
]}

Ferreira, J. A. M. ^{[1
]}

Branco, R. ^{[1
]}

Costa, J. D. ^{[1
]}

Capela, C. ^{[1
,3
]}

机构：

[1] Univ Coimbra, Dept Mech Engn, CEMMPRE, P-3004516 Coimbra, Portugal

[2] Coimbra Polytech, Dept Mech Engn, ISEC, Rua Pedro Nunes, P-3030199 Coimbra, Portugal

[3] Polytech Inst Leiria, Sch Technol & Management, P-2411901 Leiria, Portugal

来源：

ENGINEERING FRACTURE MECHANICS | 2022年 / 264卷

关键词：

Ti-6Al-4V alloy; Laser powder bed fusion; Fatigue crack growth; Mode I plus II; Mixed -mode fatigue crack growth; PLUS II; BEHAVIOR; PREDICTION;

D O I：

10.1016/j.engfracmech.2022.108327

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Mode I and mode I + II fatigue crack growth experiments are performed using compact tension shear specimens made of Ti-6Al-4V by additive manufacturing for various loading angles. The performance of various methodologies used to determine the equivalent stress intensity factor were studied, obtaining good results in simpler methods when the crack deflection angle was also included in the algorithm. The crack growth speed didn't suffer significant alterations due to similar values of crack deflection angle, mode I loading predomination and similar crack closure effect. Fractured surfaces presented irregular regions consequence of intergranular separation between alpha phase and agglomerations of beta phase.

引用

页数：14

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