Fatigue crack growth behaviors in Al-Si-Mg sand cast alloys

被引：5

作者：

Han, SW ^{[1
]}

Kim, SW ^{[1
]}

机构：

[1] Chonbuk Natl Univ, Div Adv Mat Engn, Res Inst Adv Mat Dev, Cheonju 561756, South Korea

来源：

METALS AND MATERIALS INTERNATIONAL | 2004年 / 10卷 / 01期

关键词：

Al-Si-Mg cast alloys; porosity; deflection of fatigue crack; age hardening;

D O I：

10.1007/BF03027358

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fatigue crack growth behavior of Al-Si-Mg sand cast alloys has been investigated with reference to the effects of solidification structure and aging condition. Fatigue crack growth tests have been carried out under constant load amplitude and a stress ratio of R=0.1 using CT specimens. The amount of pores in the matrix was limited by performing HIP treatment. The pores tended to promote deflection of fatigue cracks, which decreased the fatigue crack growth rate at low DeltaK regions and increased the number of cycles until final fatigue fracture. Refining and spheroidizing of eutectic Si particles increased the fatigue crack growth rates over a wide range of DeltaK up to larger DeltaK values. The difference of aging conditions significantly affected the da/dN-DeltaK(eff) relationship.

引用

页码：13 / 18

页数：6

共 23 条

[1] The influence of microstructure on the Bauschinger effect in an Al-Si-Mg casting alloy [J].

Caceres, CH ;

Griffiths, JR ;

Reiner, P .

ACTA MATERIALIA, 1996, 44 (01) :15-23

[2] Cyclic deformation and fatigue behaviour of the magnesium alloy AZ91 [J].

Eisenmeier, G ;

Holzwarth, B ;

Höppel, HW ;

Mughrabi, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 319 :578-582

[3] PLASTIC-FLOW IN DISPERSION HARDENED MATERIALS [J].

EMBURY, JD .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1985, 16 (12) :2191-2200

[4] Effects of solidification structure on short fatigue crack growth in Al-7%Si-0.4%Mg alloy castings [J].

Han, SW ;

Kumai, S ;

Sato, A .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 332 (1-2) :56-63

[5] Effects of solidification structure on fatigue crack initiation and fatigue strength in Al-Si-Mg cast alloys [J].

Han, SW ;

Lee, UJ ;

Kim, SW .

METALS AND MATERIALS INTERNATIONAL, 2002, 8 (05) :443-447

[6] MICROSTRUCTURE AND FATIGUE CRACK GROWTH IN A GAMMA-FE-NI-AL ALLOY [J].

HORNBOGEN, E ;

GAHR, KHZ .

ACTA METALLURGICA, 1976, 24 (06) :581-592

[7]

IRWIN GR, 1960, P 7 SAG OMG C 4, P60

[8] STRUCTURE OF METASTABLE PRECIPITATES FORMED DURING AGING OF AN AL-MG-SI ALLOY [J].

JACOBS, MH .

PHILOSOPHICAL MAGAZINE, 1972, 26 (01) :1-&

[9]

KUBOTA M, 1995, T JPN SOC MECH ENG A, V61, P14

[10] Effects of dendrite cell size and eutectic si particle morphology on fatigue crack growth in cast and HIPed AC4CH alloys [J].

Kumai, S ;

Aoki, S ;

Han, SW ;

Sato, A .

MATERIALS TRANSACTIONS JIM, 1999, 40 (07) :685-691

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