Journal ArticleDOI
Effects of microporosity on tensile properties of A356 aluminum alloy
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In this paper, the effect of microporosity on the tensile properties of A356 alloy was investigated through systematic experimental approaches, with a constitutive prediction that takes into account the strain rate sensitivity and strain-hardening exponent.Abstract:
The effect of microporosity on the tensile properties of A356 alloy was investigated through systematic experimental approaches, with a constitutive prediction that takes into account the strain rate sensitivity and strain-hardening exponent. The strain rate sensitivity was measured through the incremental strain rate change method, and the volumetric porosity and fractographic porosity were obtained from the measurements of bulk density and the quantitative fractography analyses on the fractured surface, respectively. The UTS and elongation exhibit a strong dependence upon the variation in microporosity, with a linear and inverse parabolic relationship, respectively. The constitutive prediction based on the fractographic rather than the volumetric porosity can more accurately predict the overall tensile properties of A356 alloy. The constitutive model should necessarily take into account the strain rate sensitivity and strain-hardening exponent for an exact theoretical prediction of the tensile properties.read more
Citations
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The effect of atmosphere on the structure and properties of a selective laser melted Al-12Si alloy
TL;DR: In this paper, Selective Laser Melting (SLM) was used to produce 12Si components in three different atmospheres: argon, nitrogen and helium, and the mechanical properties of the components produced in Ar and N2 were superior to those in He, especially the ductility.
Journal ArticleDOI
Correlation between ultimate tensile strength and solidification microstructure for the sand cast A357 aluminium alloy
TL;DR: In this paper, a relationship between secondary dendrite arm spacing (SDAS) and the mechanical behavior of cast aluminium-silicon alloys, both for tensile and fatigue strength, was found.
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Effects of eutectic silicon particles on tensile properties and fracture toughness of A356 aluminum alloys fabricated by low-pressure-casting, casting-forging, and squeeze-casting processes
TL;DR: In this paper, the effects of eutectic silicon particles on tensile properties and fracture toughness of three A356 aluminum alloys were investigated in relation with microfracture mechanism study.
Journal ArticleDOI
Er addition to Al-Si-Mg-based casting alloy: Effects on microstructure, room and high temperature mechanical properties
TL;DR: In this paper, three alloys with different rare earth concentration (between 0, and 0.41% Er) were investigated in the as-cast, peak aged and overaged conditions.
Journal ArticleDOI
Microporosity in aluminium foams
M. Mukherjee,M. Mukherjee,Francisco García-Moreno,Catalina Jimenez,Alexander Rack,John Banhart,John Banhart +6 more
TL;DR: In this article, the authors studied microporosity in the metallic matrix of aluminium foams produced by the powder metallurgical route both with and without application of a blowing agent.
References
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Journal ArticleDOI
Tensile instability and necking in materials with strain hardening and strain-rate hardening
TL;DR: In this paper, a simplified analytical model is presented, which reveals that a preexisting geometric imperfection can grow from the outset of deformation, even while the load rises.
Journal ArticleDOI
Casting defects and the tensile properties of an AlSiMg alloy
Carlos H. Cáceres,B.I. Selling +1 more
TL;DR: In this paper, the effect of different types of defects on the tensile behavior of an Al 7Si 0.4Mg casting alloy was studied and the experimental results were in agreement with the predictions of a simple analysis based on models for the growth of a plastic instability in a tensile sample.
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Effect of macro-porosity on the strength and ductility of cast Al7Si0.3Mg alloy
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On the effect of macroporosity on the tensile properties of the Al-7%Si-0.4%Mg casting alloy
TL;DR: In this article, the effect of porosity on the tensile behavior of the Al-7%Si-0.4Mg Alloy in the T-6 condition was investigated.
Journal ArticleDOI
Origins of variability in the fracture-related mechanical properties of a tilt-pour-permanent-mold cast Al-alloy
Arun M. Gokhale,G.R. Patel +1 more
TL;DR: Variability in the ductility and strength of a tilt-pour-permanent-mold cast Al-alloy is examined in this article, where the variability exhibits strong correlation with the amount of oxide films and shrinkage pores in the corresponding fracture surfaces.