Robustness of Large Thin Wall Magnesium Die Castings for Crash Applications

Alain, R.; Lawson, Tony; Katool, Pat; Wang, Gerry; Jekl, J.; Berkmortel, R.; Miller, Len; Svalestuen, Jørild; Westengen, Håkon

doi:10.4271/2004-01-0131

Cited by 9 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is apparent that failure of the samples under uniaxial tension/compression predominantly tended to emanate from the core, which includes the major fraction of porosity because of the directional solidification starting from the outer skin [24,25]. Since the pore distribution of AZ91 appears -within certain ranges -as quite disperse up to partially clustered, a clear identification of a single failure-inducing pore by simply analysing the fracture surface was hardly applicable.…”

Section: Microstructurementioning

confidence: 99%

Influence of porosity and environmental impact on fatigue life of magnesium alloys

Heuler

Grimm²,

Fuhrmann

et al. 2008

Materialwissenschaft Werkst

View full text Add to dashboard Cite

Based on experimental investigations using specimens with different grades of porosity, a significant influence of the material condition of die-cast magnesium alloys on the accuracy of fatigue-life estimation according to the local-strain approach is verified if the data-base is not related to the microstructure of the component. In order to address this transferability issue, a porosity-depending formulation is proposed. Based on a sensitivity analysis, a simplified, empirical engineering approach has been derived that describes the effect of the inherent porosity on fatigue strength via the fatiguestrength exponent b. Furthermore, it is shown that the degradation of the fatigue-behaviour in chloride-containing media is not simply determined by the external corrosive attack, but also influenced by inner defects competing with the environmental impact.

show abstract

Section: Microstructurementioning

confidence: 99%