Mechanical properties of AlSiCu alloys produced by the twin rolled continuous casting process

Okayasu, Mitsuhiro; Sato, Ryo; Takasu, Satoshi; Niikura, Akio; Shiraishi, Toshihiko

doi:10.1016/j.msea.2011.12.018

Cited by 25 publications

(15 citation statements)

References 38 publications

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“…Several studies have also demonstrated that the microstructural characteristics of Al-Si-Cu alloys were strongly influenced by various casting processes [1,9] (e. g. gravity casting, twin rolled continuous casting and cold-chamber die-casting), which in turn affected the fatigue damage of these alloys. In addition, Al-Si-Cu alloys have also shown fatigue properties, dependent on other factors, such as solidification rate [10,11], strontium modification [12,13], and content of elements (i. e. Fe, Mn, Ti, Zr and V) [5,14].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, strain-controlled low cycle fatigue (LCF) is a major cause of damage that, eventually, leads to the failure of engine parts exposed to high temperatures. However, most published works on ϰ Al-Si-Cu alloys have been focused on the stress controlled high cycle fatigue (HCF) regime [3][4][5][7][8][9][10][11][12][13]15]. Only a few strain controlled LCF studies are available on Al-Si-Cu alloys [14,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Elevated temperature low cycle fatigue of a gravity casting Al–Si–Cu alloy used for engine cylinder heads

Fan

Liu

et al. 2015

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elevated temperature low cycle fatigue of a gravity casting Al–Si–Cu alloy used for engine cylinder heads

Fan

Liu

et al. 2015

Materials Science and Engineering: A

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“…The main twin rolled continuous casting conditions are (1) temperature of the molten aluminium alloy in the furnace 973 K, (2) roll supporting force 30 ton, (3) roll temperature 298 K, (4) casting velocity about 0?4 rev min 21 and (5) shapes for the cast samples of w5130 mm6t57 mm6l51300 mm. 15 …”

Section: Materials and Sample Preparationmentioning

confidence: 99%

“…S-N relations for casting samples: gravity casting (GC), die casting (CD) and twin rolled continuous casting (TC)15 5 da/dN-DK for casting samples: gravity casting (GC), die casting (CD) and twin rolled continuous casting (TC)6,15 …”

mentioning

confidence: 99%

Fatigue properties (S–Nand da/dN–ΔK) of cast aluminium alloys

Okayasu

Takasu

Niikura³

et al. 2013

International Journal of Cast Metals Research

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In this paper, the fatigue strengths of cast aluminium alloys have been examined using the S-N and da/dN-DK approaches on various cast samples having different microstructural characteristics. These were made by several different casting techniques, namely gravity casting, die casting and twin rolled continuous casting. Owing to the different microstructures, the fatigue properties varied. The S-N relations, e.g. the endurance limit, of the twin-rolled casting were apparently high compared to the other cast samples. The high fatigue strength was related to the high tensile strength and high ductility caused by the tiny spherical a-Al phase and fine eutectic structure. On the other hand, the low fatigue strength for the gravity and die cast samples was caused by the high stress concentration caused by the a-Al phase and needle-like eutectic silicon. Unlike the fatigue strength in the S-N approach, the da/dN-DK relationships for the twin rolled casting sample, i.e. the resistance to fatigue crack propagation, were low compared to the gravity casting and the die cast samples. Such a difference in the crack growth resistance was influenced by the crack growth characteristics. For example, for the gravity cast and the die cast samples, the crack growth occurs in the grain boundaries of the coarse a-Al phase and along the long eutectic silicon grains (zigzag crack path), which promotes a strong crack closure tendency, leading to high crack growth resistance. The difference in the fatigue strength determined from the S-N relation and da/dN-DK relation was interpreted by experimental and numerical examination of the stress-strain distribution.

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“…This property leads to its high material strength by solid solution strengthening. 5 Dong et al have reported that a large degree of super saturation exists in die cast Al-Si alloys. 6 The supersaturated solid solution alloys of the Al-Si system (up to 15 at-%) can be prepared using high pressure (5?4 GPa) and a high cooling rate.…”

Section: Introductionmentioning

confidence: 99%

Crystallisation characteristics of primary silicon particles in cast hypereutectic Al–Si alloy

Okayasu

Takeuchi

Shiraishi

2013

International Journal of Cast Metals Research

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The crystallisation characteristics of primary silicon particles in a cast hypereutectic Al-Si alloy were examined using various casting processes. The size of the primary silicon particles depends on the cooling rate. However, the primary silicon particles cannot be crystallised completely when the cooling rate is .20 K s 21 , since uncrystallised Si atoms migrate to the regions at low cooling rates, producing large primary Si particles. Moreover, turbulent metal flow under conditions of high cooling rate leads to the macrosegregation of the primary Si particles, resulting in poor mechanical properties. From the crystallisation characteristics obtained, a suitable solidification criterion can be proposed.

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Mechanical properties of AlSiCu alloys produced by the twin rolled continuous casting process

Cited by 25 publications

References 38 publications

Elevated temperature low cycle fatigue of a gravity casting Al–Si–Cu alloy used for engine cylinder heads

Elevated temperature low cycle fatigue of a gravity casting Al–Si–Cu alloy used for engine cylinder heads

Fatigue properties (S–Nand da/dN–ΔK) of cast aluminium alloys

Crystallisation characteristics of primary silicon particles in cast hypereutectic Al–Si alloy

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