Grain refinement effects on the strain rate sensitivity and grain boundary sliding in partially solidified Al–5 wt%Mg alloy

Takai, Ryosuke; Kimura, Shota; Kashiuchi, R.; Kotaki, Hiromu; Yoshida, Makoto

doi:10.1016/j.msea.2016.05.023

Cited by 37 publications

(18 citation statements)

References 33 publications

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“…The device was developed by Chiba et al 28) based on one developed originally by Oya et al 29) . The device revealed true stress-true strain curves of an aluminum alloy and a copper alloy in a partially solidi ed state 10,16,17,30,31) .…”

Section: Methodsmentioning

confidence: 99%

“…Increase in the cooling rate is known to promote microsegregation 19,20) and to affect relations between temperature and solid fraction [21][22][23] during solidi cation. By considering the effect described above using a microsegregation model, the current study predicts viscoplastic properties at an intended cooling rate based on previously reported viscoplastic properties 17) . For calculation of the relation between temperature and solid fraction, the model proposed by Clyne and Kurz 15) is used, which is based on the Brody-Flemings model 24) where solute diffusion in the solid is considered.…”

Section: Predicting Cooling Rate Dependence Of Viscoplastic Propertiementioning

confidence: 99%

“…As to Ṫ avg = 0.46 K/s, the results of tensile tests were referred from an earlier report 17) . True stress and true strain were calculated using the following equations assuming that deformation of the test specimen conforms to the law of constant volume.…”

Section: Tensile Test In a Partially Solidi Ed Statementioning

confidence: 99%

“…From this background, the current study examines the following two points using an Al-5 mass%Mg alloy, for which mechanical behavior in a partially solidi ed state was investigated earlier by the authors 10,16,17) . I.…”

Section: Introductionmentioning

confidence: 99%

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Prediction and Experimental Validation of Cooling Rate Dependence of Viscoplastic Properties in a Partially Solidified State of Al–5 mass%Mg Alloy

et al. 2017

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To predict hot tearing in direct chill (DC) casting and shape casting of aluminum alloys using thermal stress analysis, cooling rate dependence of viscoplastic properties in a partially solidi ed state is indispensable. Based on viscoplastic properties determined from experiments, this study develops a method to predict the temperature dependence of viscoplastic properties at an arbitrary cooling rate through the Clyne-Kurz microsegregation model. For validation of the developed method, tensile tests were performed on Al-5 mass%Mg alloy in a partially solidi ed state at three cooling rates. Results show good agreement between the predicted values and experimentally obtained values, which demonstrates that the developed method is effective for predicting the cooling rate dependence of viscoplastic properties.

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Section: Methodsmentioning

confidence: 99%

Section: Predicting Cooling Rate Dependence Of Viscoplastic Propertiementioning

confidence: 99%

Section: Tensile Test In a Partially Solidi Ed Statementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Prediction and Experimental Validation of Cooling Rate Dependence of Viscoplastic Properties in a Partially Solidified State of Al–5 mass%Mg Alloy

et al. 2017

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“…The precipitation in these alloys indicates a several transformation sequences from the supersaturated solid solution that relies on the fine precipitation, which strained the crystallographic planes of the Al-matrix and improving the specific Young's modulus, high specific strength, yield and creep strengths [19][20][21][22]. The silicon and iron microalloying can refine microstructure of AlMg alloys due to the formation of Mg 2 Si and Al 2 MgC 2 phases during the solidification process [23,24]. Interest in the addition of silicon and Sc to the aluminum magnesium matrix is motivated by the marked effect on their corrosion resistance, mechanical behavior, and atomic structure arrangement [25,26].…”

Section: Introductionmentioning

confidence: 99%

Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

Rodríguez¹,

Martı́nez²,

Canul³

2018

Solidification

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Physical properties on solidification process deal with the internal atomic arrangement, named generally microstructure. The microstructure characteristic is essential for the properties of metallic materials, including binary, ternary or eutectic alloys. Thus, despite significant progress on microstructural evolution, numerous challenges still exist for revealing the internal structure to act synergistically with matrix alloy chemical components. It is well known that the internal microstructure of an alloy controls and modifies the nature, interaction type and properties of the existing defects and final applications.At this point, necessary understanding of the correlation between equilibrium and nonequilibrium effects, surface energy and chemical potential for the time of the structures formation is probably the key to solidification that can help to predict the complex of microstructures. For the case of multi-phase solidification, AlMgSi alloy involves thousands of atoms, at the atomic scale, that transit to microstructures while the solid-liquid phase transformation occurs. This chapter outlines the role of solidification physics, and the atomic arrangement is believed to have in influencing mechanical hardness properties and degradation resistance.

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Experimental and numerical analysis of grain refinement effect on hot tearing susceptibility for Al–Mg alloys

Takai

Endo

Hirohara

et al. 2018

Int J Adv Manuf Technol

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Grain refinement effects on the strain rate sensitivity and grain boundary sliding in partially solidified Al–5 wt%Mg alloy

Cited by 37 publications

References 33 publications

Prediction and Experimental Validation of Cooling Rate Dependence of Viscoplastic Properties in a Partially Solidified State of Al–5 mass%Mg Alloy

Prediction and Experimental Validation of Cooling Rate Dependence of Viscoplastic Properties in a Partially Solidified State of Al–5 mass%Mg Alloy

Solidification Physics and Microstructure: A Study of AlMg and AlMgSi Alloys by Vortex Method

Experimental and numerical analysis of grain refinement effect on hot tearing susceptibility for Al–Mg alloys

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