Fatigue behaviour of additively manufactured Ti-6Al-4V alloy: The role of defects on scatter and statistical size effect

被引：80

作者：

Viet-Duc Le ^{[1
]}

Pessard, Etienne ^{[1
]}

Morel, Franck ^{[1
]}

Prigent, Serge ^{[2
]}

机构：

[1] HESAM Univ, Arts & Metiers Inst Technol, LAMPA, F-49035 Angers, France

[2] IRT Jules Verne, F-44340 Bouguenais, France

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2020年 / 140卷

关键词：

Fatigue behaviour; Additive manufacturing; Ti-6Al-4V; Porosity; Size effect; BEAM MELTING EBM; SURFACE-ROUGHNESS; CRACK PROPAGATION; STRENGTH; ELECTRON; POROSITY; LIFE; PERFORMANCE;

D O I：

10.1016/j.ijfatigue.2020.105811

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This work is focused on the influence of defects on scatter and statistical size effect of Ti-6Al-4V alloy fabricated by the SLM process. A vast fatigue test campaign has been undertaken, for two surface conditions (as-built and machined surfaces) and two specimen geometries with different highly loaded volume sizes. It was shown, for machined specimens, that a large variety of crack initiation mechanisms is the principal origin of the fatigue scatter. Regarding the size effect, the change of the mechanism is the first order factor that governs the size effect. For as-built specimens, these effects are much less pronounced.

引用

页数：16

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