Prediction of fatigue performance in cast aluminum alloy components

被引：0

作者：

Lindley, T. C. ^{[1
]}

Li, Peifeng ^{[1
]}

Maijer, D. M. ^{[1
]}

Lee, P. D. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, Prince Consort Rd, London SW7 2AZ, England

来源：

SIMULATION OF ALUMINUM SHAPE CASTING PROCESSING: FROM ALLOY DESIGN TO MECHANICAL PROPERTIES | 2006年

关键词：

cast alloys; fatigue life prediction;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The influence of casting process conditions on the microstructure (secondary dendrite arm spacing, morphology of eutectic silicon and Fe-rich intermetallic particles) and defect populations (pores and oxide films) has been studied in cast aluminum alloys. The effects of eutectic modifiers (Sr), grain refiners (TiB2), solidification rate and HIPing upon the size, distribution and complex three dimensional shape of the pores formed were characterized using three dimensional (3D) X-ray tomography. This method gave more realistic dimensioning of pores compared to conventional metallography. S-N fatigue properties were established for each cast condition after T6 heat treatment. Scanning electron microscopy and fractographic examination were used to reveal the defect responsible for fatigue crack initiation. Models for situations where either crack initiation or small crack growth constituted the dominant phase of fatigue life were reviewed before formulating a unified methodology for the prediction of fatigue life of cast components.

引用

页码：289 / +

页数：3

共 29 条

[1] Modelling the optimum grain size on the low cycle fatigue life of a Ni based superalloy in the presence of two possible crack initiation sites [J].