Damage Investigation in A319 Aluminium Alloy by X-ray Tomography and Digital Volume Correlation during In Situ High-Temperature Fatigue Tests

被引：48

作者：

Dahdah, N. ^{[1
,2
]}

Limodin, N. ^{[1
]}

El Bartali, A. ^{[1
,2
]}

Witz, J. F. ^{[1
]}

Seghir, R. ^{[1
,2
]}

Charkaluk, E. ^{[1
]}

Buffiere, J. Y. ^{[3
]}

机构：

[1] FRE 3723, LML, F-59650 Villeneuve Dascq, France

[2] Ecole Cent Lille, Cite Sci, F-59650 Villeneuve Dascq, France

[3] Inst Natl Sci Appl, CNRS UMR 5510, Lab Mat Ingn & Sci MATEIS, Ave Jean Capelle, F-69621 Villeurbanne, France

来源：

STRAIN | 2016年 / 52卷 / 04期

关键词：

A319; digital volume correlation; fatigue; high temperature; in situ synchrotron X-ray tomography; LIFE ASSESSMENT; CAST; IMAGE; MECHANISMS; EXTRACTION; CRACKS;

D O I：

10.1111/str.12193

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The aim of this work is to analyse the strain field heterogeneity in an aluminium alloy subjected to low-cycle fatigue at high temperature. In the cylinder heads produced by a lost-foam casting process, the microstructure of the studied alloy consists hard intermetallic phases and large gas and microshrinkage pores. In order to study the influence of this complex 3D microstructure on fatigue crack initiation and propagation at 250 degrees C, an experimental protocol using laboratory and synchrotron tomography, finite element simulation and a new digital volume correlation platform have been used. The results showed the role of pores in the crack nucleation and highlighted the importance of hard phases in the crack propagation, thanks to the resolution on the DVC measurement.

引用

页码：324 / 335

页数：12

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