Casting porosity and long-life fatigue strength of a cast Al-alloy

被引：8

作者：

Nicoletto, G. ^{[1
]}

Konecna, R. ^{[2
]}

Baicchi, P. ^{[1
]}

Majerova, V. ^{[2
]}

机构：

[1] Univ Parma, Dept Ind Engn, I-43100 Parma, Italy

[2] Zilina Univ, Dept Mat Engn, Zilina, Slovakia

来源：

MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE V | 2008年 / 567-568卷

关键词：

cast Al-Si alloy; shrinkage pore; fatigue strength; LEVD distribution;

D O I：

10.4028/www.scientific.net/MSF.567-568.393

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The sand casting process usually generates porosity that is highly detrimental especially to the fatigue behavior of Al-Si alloys. Since pores favor early fatigue crack initiation, the total fatigue life is crack-propagation-dominated and, for a given stress level, strongly depends on the initiating pore size. Here long life fatigue strengths were estimated using specimens extracted from different AlSi7Mg castings. Detailed metallographic characterization of specimen sections was carried out to determine pore size distributions and correlate it to test results. Murakami's experimental procedure for applying the largest extreme value statistics to small defect characterization is applied and discussed.

引用

页码：393 / +

页数：2

共 6 条

[1]

Bryant J. D., 1996, ALUMINIUM MAGNESIUM

[2] The effect of porosity on the fatigue life of cast aluminium-silicon alloys [J].