Effects of Porosity on the Fatigue Behaviour of AlZn10Si8Mg Casting Alloys in a High Cycle Region

Závodská, Denisa; Tillová, Eva; Guagliano, Mario; Chalupová, Mária; Kuchariková, Lenka

doi:10.1016/j.proeng.2017.06.170

Cited by 10 publications

(4 citation statements)

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“…The alZn10si8Mg alloy is becoming increasingly popular in the automotive industry, where it is used for components working under variable load conditions, replacing the alsi7Mg alloy previously used for such applications. in general, self-hardening alloys are used wherever castings are expected to perform at high fatigue strengths, which are influenced, by microstructure, non-metallic inclusions, and porosity [2,7,8,11,13,15]. authors Závodská [2] and vicen [16] confirmed in their research works the fact the fatigue strength of alZn10si8Mg is higher compared to alsi7Mg0.3 alloy due to the morphology of structural components such as eutectic silicon is in form of isolated rods without any heat treatment or modification.…”

Section: Introductionmentioning

confidence: 93%

“…in general, self-hardening alloys are used wherever castings are expected to perform at high fatigue strengths, which are influenced, by microstructure, non-metallic inclusions, and porosity [2,7,8,11,13,15]. authors Závodská [2] and vicen [16] confirmed in their research works the fact the fatigue strength of alZn10si8Mg is higher compared to alsi7Mg0.3 alloy due to the morphology of structural components such as eutectic silicon is in form of isolated rods without any heat treatment or modification. only porosity had a negative effect on fatigue properties, which initiated the formation of cracks, however, this is common for both secondary alloys.…”

Section: Introductionmentioning

confidence: 93%

“…4). in particular, the platelet/ needle-like morphology is considered to be the most detrimental to mechanical properties, promoting the formation of casting defects, such as porosity and shrinkage [2,21,23] The last intermetallic phase common to all experimental alloys is in the form of sharp-edge particles for alZn10si8Mg is identified as alFeMnMgsi or al(FeMn)Ni and for alsi7Mg0.3 alloys is identified as alFeMnMgsi or al(FeMn)si. From a morphological point of view in Fig.…”

Section: Microstructure Comparisonmentioning

confidence: 99%

“…aluminium production is an energy-intensive process that uses elevated temperatures and has a significant impact on the environment. For this reason, foundries are focusing on minimizing the production of primary aluminium components and replacing them with secondary (recycled) aluminium [2,3]. secondary aluminum gets its name from its source.…”

Section: Introductionmentioning

confidence: 99%

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InvestIgatIon of self-HardenIng alZn10si8Mg Cast alloy for tHe autoMotIve Industry self-hardening aluminium alloys represent a new and interesting group of aluminium alloys. They have the advantage that they do not need to be heat treated, which is an important advantage that contributes to a significant reduction in production costs of some components and in the amount of energy used. The present paper deals with the possibility to replace the most used heat treatable alsi7Mg0.3 cast alloys with a self-hardened alZn10si8Mg cast alloy. in this study, microstructural characterization of tensile and fatigue-tested samples has been performed to reveal if this replacement is possible. The results of fatigue tests show that alsi7Mg0.3 alloy after T6 heat treatment and self-hardened alZn10si8Mg has comparable values of fatigue properties. The self-hardening alloy has slightly lower strength, ductility, and hardness.

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