Tensile and fatigue behaviour of thin-walled cast A383.0 components

Hébert, G R; Dubé, D.; Tremblay, R.

doi:10.1016/j.msea.2012.05.012

Cited by 19 publications

(7 citation statements)

References 46 publications

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“…This method can be employed for production of the high-quality castings from magnesium, zinc, and copper alloys. Its broad perspectives of application are suggested by the results of several works [7,10,11,[14][15][16]. Application of the negative (relative) pressure in the die cavity causes that both the porosity level of castings become comparable with the respective results obtained for squeeze casting technology [15].…”

Section: Introductionmentioning

confidence: 98%

“…Its broad perspectives of application are suggested by the results of several works [7,10,11,[14][15][16]. Application of the negative (relative) pressure in the die cavity causes that both the porosity level of castings become comparable with the respective results obtained for squeeze casting technology [15]. The presented method, as compared with the conventional HPDC process, requires some changes in construction of the metal mould and some adjustments in working parameters of the injection system [7,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Porosity of Castings Produced by the Vacuum Assisted Pressure Die Casting Method

Zyska¹,

Konopka²,

Łągiewka³

et al. 2015

Archives of Foundry Engineering

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The paper presents the results of investigations concerning the influence of negative (relative) pressure in the die cavity of high pressure die casting machine on the porosity of castings made of AlSi9Cu3 alloy. Examinations were carried out for the VertaCast cold chamber vertical pressure die casting machine equipped with a vacuum system. Experiments were performed for three values of the applied gauge pressure: -0.3 bar, -0.5 bar, and -0.7 bar, at constant values of other technological parameters, selected during the formerly carried initial experiments. Porosity of castings was assessed on the basis of microstructure observation and the density measurements performed by the method of hydrostatic weighing. The performed investigation allowed to find out that -for the examined pressure range -the porosity of castings decreases linearly with an increase in the absolute value of negative pressure applied to the die cavity. The negative pressure value of -0.7 bar allows to produce castings exhibiting porosity value less than 1%. Large blowholes arisen probably by occlusion of gaseous phase during the injection of metal into the die cavity, were found in castings produced at the negative pressure value of -0.3 bar. These blowholes are placed mostly in regions of local thermal centres and often accompanied by the discontinuities in the form of interdendritic shrinkage micro-porosity. It was concluded that the high quality AlSi9Cu3 alloy castings able to work in elevated temperatures can be achieved for the absolute value of the negative pressure applied to the die cavity greater than 0.5 bar at the applied set of other parameters of pressure die casting machine work.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Porosity of Castings Produced by the Vacuum Assisted Pressure Die Casting Method

Zyska¹,

Konopka²,

Łągiewka³

et al. 2015

Archives of Foundry Engineering

View full text Add to dashboard Cite

show abstract

“…Aluminum cast alloys are widely applied, for example, in motor vehicles, ships, aircraft, machines, and structures, owing to the high cast ability and high specific strength [1][2][3]. They can be improved so as to meet specific mechanical properties by tuning the casting method, the alloying elements, and the cooling and heat treatment conditions [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Limit Reliability Analysis for Notched Material with Some Kinds of Dense Inhomogeneities Using Fracture Mechanics

Miyazaki¹,

Hamada²,

Noguchi³

2020

Fracture Mechanics Applications

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This study proposes a quantitative method for predicting fatigue limit reliability of a notched metal containing inhomogeneities. Since the fatigue fracture origin of the notched metal cannot be determined in advance because of stress nonuniformity, randomly distributed particles, and scatter of a matrix, it is difficult to predict the fatigue limit. The present method utilizes a stress-strength model incorporating the "statistical hardness characteristics of a matrix under small indentation loads" and the "statistical hardness characteristics required for non-propagation of fatigue cracks from microstructural defects". The notch root is subdivided into small elements to eliminate the stress nonuniformity. The fatigue limit reliability is predicted by unifying the survival rates of the elements obtained by the stress-strength model according to the weakest link model. The method is applied to notched specimens of aluminum cast alloy JIS AC4B-T6 containing eutectic Si, Fe compounds and porosity. The fatigue strength reliability at 10 7 cycles, which corresponds to the fatigue limit reliability, is predicted. The fatigue limits of notch root radius ρ = 2, 1, 0.3, and 0.1 mm are obtained by rotating-bending fatigue tests. It is shown that the fatigue limits predicted by the present method are in good agreement with the experimental ones.

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“…Thus, Al alloys have become promising candidates as lightweight automotive materials [2,3]. In the family of cast Al-Si alloys, the Al-Si-Cu-Mg grades are commonly used in power train applications, due to their high strength to weight ratio, good thermal conductivity, excellent fluidity, hot tear resistance and feeding characteristics which allow casting intricate shapes such as engine blocks, cylinder heads or chassis [4]. Depending on the size and shape of the product, the solidification rate varies, affecting the alloy microstructure, strength and fatigue performance during service.…”

Section: Introductionmentioning

confidence: 99%

Effect of solidification rate and loading mode on deformation behavior of cast Al–Si–Cu–Mg alloy with additions of transition metals

Shaha

Czerwiński

Kasprzak

et al. 2015

Materials Science and Engineering: A

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Tensile and fatigue behaviour of thin-walled cast A383.0 components

Cited by 19 publications

References 46 publications

Porosity of Castings Produced by the Vacuum Assisted Pressure Die Casting Method

Porosity of Castings Produced by the Vacuum Assisted Pressure Die Casting Method

Fatigue Limit Reliability Analysis for Notched Material with Some Kinds of Dense Inhomogeneities Using Fracture Mechanics

Effect of solidification rate and loading mode on deformation behavior of cast Al–Si–Cu–Mg alloy with additions of transition metals

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