Short crack growth model for the evaluation of the fatigue strength of WAAM Ti-6Al-4V alloy containing pore-type defects

被引：8
|
作者：
Bergant, Marcos [1 ,2 ]
Larrosa, Nicolas O. [3 ,4 ,5 ]
Yawny, Alejandro [1 ,2 ]
Madia, Mauro [6 ]
机构：
[1] Univ Nacl Cuyo, Ctr At Bariloche CNEA, Div Fis Met, Inst Balseiro, RA-8400 San Carlos De Bariloche, Argentina
[2] Consejo Nacl Invest Cient & Tecnol CONICET, Buenos Aires, Argentina
[3] Univ Bristol, Dept Mech Engn, Bristol, England
[4] Univ Seville, Dept Mech & Fabricat Engn, Seville 41092, Spain
[5] Basque Res & Technol Alliance BRTA, TECNALIA, Donostia San Sebastian 20009, Spain
[6] Bundesanstalt Mat Forsch & prufung BAM, Div 94, D-12205 Berlin, Germany
来源：
ENGINEERING FRACTURE MECHANICS | 2023年 / 289卷
基金：
英国工程与自然科学研究理事会;
关键词：
WAAM Ti-6Al-4V; Cyclic R-curve; IBESS model for short cracks-curve; Kitagawa-Takahashi (K-T) diagram; ADDITIVELY MANUFACTURED TI-6AL-4V; CYCLIC R-CURVE; PROPAGATION THRESHOLD; MECHANICAL-PROPERTIES; POROSITY DEFECTS; WIRE; MICROSTRUCTURE; PERFORMANCE; PREDICTION; LIFE;
D O I：
10.1016/j.engfracmech.2023.109467
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The role of defects in the fatigue strength of Wire Arc Additively Manufactured (WAAMed) Ti6Al-4V is analysed by means of the IBESS model, a fracture mechanics short crack growth approach based on the cyclic R-curve. Pores and crack-like defects are analysed. Estimations of the role of pore shape and size agree well with published fatigue data of WAAM Ti-6Al-4V with pores. The model is also used to explain the effect of fabrication defects on the scatter of experimental data. This demonstrates that short crack growth models represent a suitable engineering tool for the fatigue assessment of defective AM materials.
引用
收藏
页数：21
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