Multiaxial fatigue behavior of SLM Ti6Al4V alloy under different loading conditions

被引：13

作者：

Renzo, Danilo A. ^{[1
]}

Sgambitterra, Emanuele ^{[1
]}

Maletta, Carmine ^{[1
]}

Furgiuele, Franco ^{[1
]}

Biffi, Carlo A. ^{[2
]}

Fiocchi, Jacopo ^{[2
]}

Tuissi, Ausonio ^{[2
]}

机构：

[1] Univ Calabria, Dept Mech Energy & Management Engn, I-87036 Arcavacata Di Rende, Italy

[2] Natl Res Council Italy, Inst Condensed Matter Chem & Technol Energy, Lecce, Italy

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2021年 / 44卷 / 10期

关键词：

additive manufacturing; digital image correlation; infrared thermography; multiaxial fatigue; titanium alloys; ADDITIVE MANUFACTURED TI-6AL-4V; TITANIUM-ALLOY; MECHANICAL-PROPERTIES; LIFE PREDICTION; LASER; DEFORMATION; PERFORMANCE; DEPOSITION; DEFECTS; WROUGHT;

D O I：

10.1111/ffe.13518

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The multiaxial fatigue behavior of Ti6Al4V samples, made by selective laser melting (SLM) process, was investigated in this work. Fatigue tests were carried out under three different loading conditions: (i) tensile, (ii) torsion, and (iii) in-phase axial-torsional. A modified damage model, based on the Sines criterion, is proposed and used to analyze proportional multiaxial fatigue data. Preliminary results showed that the proposed version provides a better prediction with respect to the Sines model. Infrared thermography and digital image correlation were also used to capture both temperature and strain evolutions during fatigue tests. Fatigue results highlighted different failure modes due to surface crack initiation and internal crack initiation, as also demonstrated by scanning electron microscopy of the fracture surface.

引用

页码：2625 / 2642

页数：18

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