Effect of process parameters on porosity distributions in high-pressure die-cast AM50 Mg-alloy

Lee, S.G.; Gokhale, A.M.; Patel, G.R.; Evans, Mike

doi:10.1016/j.msea.2006.04.082

Cited by 85 publications

(40 citation statements)

References 9 publications

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“…3 If parameters are not carefully controlled, the castings will turn out defective. The most typical defect in HPDC components is porosity, [4][5][6][7][8] which substantially degrades properties. Adamane et al 6 reviewed the effects of the injection parameters on the porosity and tensile properties of the die castings and suggested optimal values for the gate velocity and intensification pressure for an aluminum alloy.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, they reported that the casting with a high injection velocity cannot be preferred together with high pouring temperature, a high-pressure injection with vacuum. Lee et al 7 showed that for magnesium alloy porosity is reduced with increasing intensification pressure, but increased with increasing casting second-phase injections speed.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Process Parameters on Distortion and Residual Stress of High-Pressure Die-Cast AZ91D Components

2017

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This paper presents a study of distortion and residual stress within a high-pressure die-cast AZ91D component, cast under different processing conditions. The influence of process parameters, i.e., die temperature, cooling time, intensification pressure and first-phase injection speeds, was examined. Distortions were measured using the inhouse standard analog quality control fixture. Residual stress depth profiles were measured using a prism holedrilling method. It was found that the most important process parameter affecting the distortion was intensification pressure and the second most important was temperature difference between the two die halves (fixed and moving side). Tensile residual stresses were found very near the surface. Increasing the intensification pressure resulted in an increased level of tensile residual stresses.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on Distortion and Residual Stress of High-Pressure Die-Cast AZ91D Components

2017

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“…Though 2D image based microscopy techniques such as optical and SEM characterisation provides internal microstructural information of MMCs, it is difficult to obtain quantified information on porosity and particle size distribution using these techniques [19][20][21]. X-ray computed tomography (XCT) is a non-destructive technique which can provide a three dimensional (3D) visualisation of internal structure of inhomogeneities representative of bulk sample [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

X-ray tomography studies on porosity and particle size distribution in cast in-situ Al-Cu-TiB2 semi-solid forged composites

Mathew

Mandal

Warnett

et al. 2016

Materials Characterization

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. (2016) X-ray tomography studies on porosity and particle size distribution in cast in-situ Al-Cu-TiB2 semi-solid forged composites. Materials Characterization. Permanent WRAP URL:http://wrap.warwick.ac.uk/79069 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT1 X-ray tomography studies on porosity and particle size distribution in cast insitu Al-Cu-TiB 2 semi-solid forged composites forging reduction resulted in greater uniformity in distribution of TiB 2 particles within the composite compared to as-cast and the 50% forge reduction in semi-solid state. These results show that the application of forging in semi-solid state enhances particle distribution and reduces porosity formation in cast in-situ Al-Cu-TiB 2 metal matrix composites.

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“…The thin and complex shape of products had more occasion to meet porosities on its surface [4]. The causes ofporosity might be formed by unsuitable gate, runner, overflow and vents design [5,6]. Reduction of porosities in parts could start with an original design of runner geometry [7].…”

Section: Introductionmentioning

confidence: 99%

Evaluate of Chill Vent Performance for High Pressure Die-Casting Production and Simulation of Motorcycle Fuel Caps

Meethum

Suvanjumrat

2017

MATEC Web Conf.

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Abstract. Inappropriate air vent design always induced porosities in thin and complex shape of high pressure diecasting (HPDC) products. Chill block installation was preferred to improve permanent molds for reducing porosities. There were not regular to obtain an appropriated chill vent from this method unless an experience of mold makers. This research was performed to investigate and evaluate the chill block performance in the HPDC mold of motorcycle fuel caps. The HPDC mold of the thin and complex shape product without chill vents was improved by inserting of chill blocks. The motorcycle fuel caps of molds with and without chill vents were compared to verify size and position of porosity defects. Furthermore the HPDC simulation using the finite element analysis (FEA) had been performed according to the physical experiment. The FEA results were compared and in agreement with the experimental data. Therefore an improvement of the HPDC mold should be used FEA to obtain the best way of the air vent design.

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Effect of process parameters on porosity distributions in high-pressure die-cast AM50 Mg-alloy

Cited by 85 publications

References 9 publications

Effect of Process Parameters on Distortion and Residual Stress of High-Pressure Die-Cast AZ91D Components

Effect of Process Parameters on Distortion and Residual Stress of High-Pressure Die-Cast AZ91D Components

X-ray tomography studies on porosity and particle size distribution in cast in-situ Al-Cu-TiB2 semi-solid forged composites

Evaluate of Chill Vent Performance for High Pressure Die-Casting Production and Simulation of Motorcycle Fuel Caps

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