Paper Titles
Formation of a Recrystallized and Recovered Multilayered Microstructure in a Hybrid Aluminium Alloy
p.131
Effects of Sb and RE on the Solutionized Microstructure and Microhardness of Mg-6A1-1Zn-0.7Si Magnesium Alloy
p.135
Improvements in Strength and Electrical Conductivity in 7B04 Aluminum Alloy Pre-Stretched Thick Plates Via Low-Temperature Retrogression and Re-Ageing Heat Treatments
p.139
Influence of Structure and Ionic Radius on Solubility Limit in the Mg–Re Systems
p.143
Study on the In Situ SEM Tension Observation of E-A356 Alloys
p.147
Characterization of Intermetallic Phases and Planar Defects in Mg-Y-Zn Alloys
p.151
A Constitutive Equation Coupling the Grain Size during the High Temperature Deformation of Ti-6.62Al-5.14Sn-1.82Zr Alloy
p.155
The Influence of Process Parameters during Machining of Ti6Al4V Alloy
p.159
Long Term Creep Properties of a Die-Cast Mg-Al-Ca Alloy
p.163

Study on the In Situ SEM Tension Observation of E-A356 Alloys

Article Preview

Abstract:

The fracture mechanisms of E-A356 alloys (T5 treatment) have been investigated by means of in situ SEM under nonaxial tension loading. It is found that the crack initiated at the casting defects, such as at the gas or the shrinkage pores, because of the debonding of the silicon particles from the Al matrix. The crack propagation was mainly in the Al matrix and along the matrix/particle interface secondarily. The crack growth could be influenced by the eutectic silicon particles, when it encountered the Si particles, the growth direction would be changed and turned toward the weaker areas. The fracture resistance or the mechanical properties of the E-A356 alloys will be improved by means of reducing, eliminating gas or shrinkage pores and increasing the interface bound strength of the eutectic silicon particles with the Al matrix.

You might also be interested in these eBooks
PRICM 6 View Preview

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

147-150

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.147

Citation:

Cite this paper

Online since:

October 2007

Authors:

Ji Wen Li, Jing Pei Xie, Wen Yan Wang, Shi Zhong Wei

Keywords:

Crack Initiation, Crack Propagation, E-A356 Alloy, In Situ SEM Tension

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2007 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Wang, Q.G.; Cáceres, C.H., The fracture mode in Al-Si-Mg casting alloys，Materials Science and Engineering: A Volume: 241, Issue: 1-2, January, 1998, pp.72-82.

DOI: 10.1016/s0921-5093(97)00476-0

Google Scholar

[2] McDowell, D.L.; Gall, K.; Horstemeyer, M.F.; Fan, J., Microstructure-based fatigue modeling of cast A356-T6 alloy, Engineering Fracture Mechanics Volume: 70, Issue: 1, January, 2003, pp.49-80.

DOI: 10.1016/s0013-7944(02)00021-8

Google Scholar

[3] Mocellin, A.; Brechet, Y.; Fougeres, R., Fracture of an osprey TM AlSiFe alloy: a microstructure based model for fracture of microheterogeneous materials, Acta Metallurgica Materialia Volume: 43, Issue: 3, March, 1995, pp.1135-1140.

DOI: 10.1016/0956-7151(94)00327-e

Google Scholar

[4] Jacques Stolarz, Olivier Madelaine-Dupuich, Thierry Magnin, Microstructural factors of low cycle fatigue damage in two phaseAl-Si alloys, Materials Science and Engineering A299 (2001) 275-286.

DOI: 10.1016/s0921-5093(00)01428-3

Google Scholar

[5] Zhang Jingwu, Jing Tianfu. In Situ TEM Study of Cracks Initiation and Propagation in A Grain of FCC Metal, Chinese Jouranal of Materials Research Vol. 13, 2(1999) 31-35.

Google Scholar

[6] Kwai S. Chan, Peggy Johes, Qigui Wang, Fatigue crack growth and fracture paths in sand B319 and A356 aluminium alloys[J], Materials Science and Engineering A341 (2002) 18-34.

DOI: 10.1016/s0921-5093(02)00196-x

Google Scholar