Microstructural Effects on the Fatigue Properties of a Cast Al7SiMg Alloy AB Volvo, Technological Development

Format:

Conference/Event

Author/Creator:

Wickberg, A., author.

Conference Name:

SAE International Congress & Exposition (1984-02-27 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1984

Summary:

The fatigue strength of permanent mould and sandcast aluminium is strongly influenced by the cooling rate during casting. Slower solidification yields larger secondary dendrite arm spacing with a coarser eutectic and greater defetcs id est porosities and intermetallic β (FeSiAl5).The negativ effect of porosity is greater than that of the amount/size of the β-platelets. The defects affect both the crack nucleation and the propagation phases. For very large defects, the initiation phase is reduced and a large portion of the life is spent as crack propagation.The secondary dendrite arm spacing (DAS) represents a good over all indication of the fatigue strength of the material, which is proportional to (DAS)1/2. This relationship can be used to estimate the fatigue strength at various locations in a cast aluminium component

Notes:

Vendor supplied data

Publisher Number:

840121

Access Restriction:

Restricted for use by site license