Proof of fatigue strength of nuclear components part II: Numerical fatigue analysis for transient stratification loading considering environmental effects

Krätschmer, D.; Roos, Eberhard; Schuler, Xaver; Herter, Karl-Heinz

doi:10.1016/j.ijpvp.2012.01.005

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…For the Al-1.5 vol% Si 3 N 4 nanocomposite, the ultimate tensile strength and yield strength decreased when the tensile tests were carried out at 100 and 200 C. The soening of the matrix together with the grain growth along with increasing test temperature leads to less pronounced strain hardening behaviour in these composites. 33 It was found that the UTS of the samples were markedly prominent for extruded Al-…”

Section: Tensile Analysis Of Al-si 3 N 4 Nanocompositesmentioning

confidence: 96%

Improved properties of Al–Si₃N₄ nanocomposites fabricated through a microwave sintering and hot extrusion process

et al. 2017

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Section: Tensile Analysis Of Al-si 3 N 4 Nanocompositesmentioning

confidence: 96%

Improved properties of Al–Si₃N₄ nanocomposites fabricated through a microwave sintering and hot extrusion process

et al. 2017

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“…4,5 The service life of an engineering component depends on several factors, such as environmental conditions, service temperature etc. 6,7 The tribological and corrosion properties have influential effects on the durability of the components, especially in automotive applications like pistons, cylinder heads etc. 8,9 It has been reported by several authors that the wear resistance of the components are directly related to the hardness of the material [10][11][12] and that the wear resistance of materials, such as Al-Si alloys, can be enhanced by several methods, including grain refinement, surface coatings, alloying addition etc.…”

Section: Introductionmentioning

confidence: 99%

Tribological and corrosion properties of Al–12Si produced by selective laser melting

et al. 2014

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The effect of annealing on the tribological and corrosion properties of Al-12Si samples produced by selective laser melting (SLM) is evaluated via sliding and fretting wear tests and weight loss experiments and compared to the corresponding material processed by conventional casting. Sliding wear shows that the as-prepared SLM material has the least wear rate compared to the cast and heat-treated SLM samples with abrasive wear as the major wear mechanism along with oxidation. Similar trend has also been observed for the fretting wear experiments, where the as-prepared SLM sample displays the minimum wear loss. On the other hand, the acidic corrosion behavior of the as-prepared SLM material as well as of the cast samples is similar and the corrosion rate is accelerated by increasing the heat treatment temperature. This behavior is due to the microstructural changes induced by the heat treatment, where the continuous network of Si characterizing the as-prepared SLM sample transforms to isolated Si particles in the heat-treated SLM specimens. This shows that both the wear and corrosion behaviors are strongly associated with the change in microstructure of the SLM samples due to the heat-treatment process, where the size of the hard Si particles increases, and their density decreases with increasing annealing temperature.

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“…The samples annealed at 573 K were then tested at three different temperatures, i.e., 373, 423, and 473 K. As expected, the material softens when tested at elevated temperatures. The YS decreases from 138 ± 3 to 114 ± 4 MPa and the UTS from 207 ± 5 to 122 ± 2 MPa, when the tensile tests were performed at 300 and 473 K. The softening of the matrix along with grain growth with increasing test temperature leads to less pronounced strain hardening behavior in these samples [51]. However, the plasticity of the samples increases from~3.8% ± 0.1% to 5% ± 0.3%, suggesting that SLM-fabricated Al-12Si components at their service temperatures lose their strength only marginally, without a drastic change in their fracture strain, which, in turn, shows a marginal improvement.…”

Section: Resultsmentioning

confidence: 91%

Tensile Properties of Al-12Si Fabricated via Selective Laser Melting (SLM) at Different Temperatures

2016

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Abstract:Additive manufacturing processes such as selective laser melting (SLM) are attracting increasing attention and are regarded as the manufacturing technology of the future, because of their ability to produce near net shaped components of theoretically any shape with added functionality. Various properties, including mechanical, tribological, welding, and corrosion properties, of Al-12Si alloys fabricated via SLM have been extensively studied. However, all of these studies were carried out at ambient conditions. Nevertheless, under working conditions, these alloys experience service temperatures ranging between 373 and 473 K. The present study focuses on the evaluation of the mechanical properties of SLM-fabricated Al-12Si alloys in this temperature range. For this, Al-12Si alloy specimens were annealed at 573 K, a temperature well beyond the test temperature in order to provide a stable microstructure during tensile testing. The plasticity of these materials increases along with the size of the dimples on the fracture surface with increasing tensile test temperature. Moreover, the annealed Al-12Si alloy exhibits appreciable tensile properties when tested between 373 K and 473 K. The results suggest that Al-12Si samples fabricated via SLM may be ideal candidates for automotive applications such as pistons and cylinder heads.

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Proof of fatigue strength of nuclear components part II: Numerical fatigue analysis for transient stratification loading considering environmental effects

Cited by 4 publications

References 3 publications

Improved properties of Al–Si₃N₄ nanocomposites fabricated through a microwave sintering and hot extrusion process

Improved properties of Al–Si₃N₄ nanocomposites fabricated through a microwave sintering and hot extrusion process

Tribological and corrosion properties of Al–12Si produced by selective laser melting

Tensile Properties of Al-12Si Fabricated via Selective Laser Melting (SLM) at Different Temperatures

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Proof of fatigue strength of nuclear components part II: Numerical fatigue analysis for transient stratification loading considering environmental effects

Cited by 4 publications

References 3 publications

Improved properties of Al–Si3N4 nanocomposites fabricated through a microwave sintering and hot extrusion process

Improved properties of Al–Si3N4 nanocomposites fabricated through a microwave sintering and hot extrusion process

Tribological and corrosion properties of Al–12Si produced by selective laser melting

Tensile Properties of Al-12Si Fabricated via Selective Laser Melting (SLM) at Different Temperatures

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Product

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Improved properties of Al–Si₃N₄ nanocomposites fabricated through a microwave sintering and hot extrusion process

Improved properties of Al–Si₃N₄ nanocomposites fabricated through a microwave sintering and hot extrusion process