On effect of squeezing pressure on microstructural characteristics, heat treatment response and electrical conductivity of an Al-Si-Mg-Ni-Cu alloy

Ashiri, Rouholah; Karimzadeh, F.; Niroumand, Behzad

doi:10.1179/1743284713y.0000000405

Cited by 18 publications

(5 citation statements)

References 25 publications

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“…Such mechanical characteristics were improved due to refined microstructure obtained for the applied pressures up to 140 MPa. This is confirmed by Ashiri et al (2009) and Ashiri et al (2014) who observed a fine microstructure with small dendrite arm spacing for high pressure. Adamane et al (2015) reviewed the influence of injection parameters in HPDC process, particularly the injection pressure and gate velocity on the porosity and tensile ⁎ Corresponding author.…”

Section: Introductionsupporting

confidence: 70%

Effect of Si, Cu and processing parameters on Al-Si-Cu HPDC castings

Outmani

Fouilland-Paillé

Isselin

et al. 2017

Journal of Materials Processing Technology

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Chemical composition of secondary Al-Si-Cu alloys and working variables of high-pressure die casting process (HPDC) may change for the same casting parts from one country to another in the world. They can even sometimes vary from one manufacturing site to another within the same country. An experimental study on the influence of alloying elements contents (Si and Cu), casting temperature and injection pressure on mechanical properties of die cast aluminum alloys was carried out to support the automotive industry suppliers in designing their cast parts. The microstructural features and the porosity level were also investigated and assessed. The primary objective is to highlight the modification mechanisms of the achieved properties using tensile tests, hardness measurements and microstructural observations performed on a HPDC casting parts. Low pressure and low temperature increase the rate of porosity, promote the formation of coarse Fe-rich intermetallic compounds and change the morphology of α-Al phases. These in turn deteriorate mechanical tensile properties. However, variation of alloying elements contents modifies the optimum properties achieved when part is made at constant casting processing parameters. Finally, the interactions between the studied parameters of HPDC and the chemical alloying elements show also a significant influence on the tensile properties.

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Section: Introductionsupporting

confidence: 70%

Effect of Si, Cu and processing parameters on Al-Si-Cu HPDC castings

Outmani

Fouilland-Paillé

Isselin

et al. 2017

Journal of Materials Processing Technology

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“…High intensification pressure assists in achieving a sound casting 22 and fine microstructure. 23 In the present study, the intensification pressure was set as 120 MPa, above which no macroscopic shrinkage porosities were observed in the wheel hub near the gate.…”

Section: Methodsmentioning

confidence: 96%

Characteristics of defect bands and their formation mechanisms in A356 wheel fabricated by horizontal squeeze casting

Huang

et al. 2015

Materials Science and Technology

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Based on the opinion that a decreasing solid fraction gradient in the cross-section develops during the intensification stage, the shear stress in the solidifying alloy was analysed, and a mechanism for dilatant band formation was discussed. That is, when the shear stress at one position of the stable grain network reaches a critical value, the network collapses and the band forms. The characteristics of defect bands at different locations of an A356 wheel fabricated by horizontal squeeze casting were then studied. Three types of defect bands, i.e. skin related band, dilatant band and separate band, were observed. Combining the process and conditions of defect band formation, several types of defect bands in the casting were discussed. Furthermore, the influence of the structural characteristics of castings on the defect bands, including thickness, geometry and location, was summarised.

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“…Reference [63] also revealed that rare elements had a small effect on the electrical conductivity of aluminum. Obviously, the element Si influences the thermal conductivity to a reduced extent compared with Zr, Ti, V, Mn, and Cr and also has excellent castability and acceptable strength for die-cast aluminum alloys compared to elements before Si [65]. Thus, Al-Si alloys are the most common system for die-cast heat dissipation components.…”

Section: Die-cast Aluminum Alloys For Thermal Conductivitymentioning

confidence: 99%

Research Progress on Thermal Conductivity of High-Pressure Die-Cast Aluminum Alloys

Liu,

Xiong

2024

Metals

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High-pressure die casting (HPDC) has been extensively used to manufacture aluminum alloy heat dissipation components in the fields of vehicles, electronics, and communication. With the increasing demand for HPDC heat dissipation components, the thermal conductivity of die-cast aluminum alloys is paid more attention. In this paper, a comprehensive review of the research progress on the thermal conductivity of HPDC aluminum alloys is provided. First of all, we introduce the general heat transport mechanism in aluminum alloys, including electrical transport and phonon transport. Secondly, we summarize several common die-cast aluminum alloy systems utilized for heat dissipation components, such as an Al–Si alloy system and silicon-free aluminum alloy systems, along with the corresponding composition optimizations for these alloy systems. Thirdly, the effect of processing parameters, which are significant for the HPDC process, on the thermal conductivity of HPDC aluminum alloys is discussed. Moreover, some heat treatment strategies for enhancing the thermal conductivity of die-cast aluminum alloys are briefly discussed. Apart from experimental findings, a range of theoretical models used to calculate the thermal conductivity of die-cast aluminum alloys are also summarized. This review aims to guide the development of new high-thermal-conductivity die-cast aluminum alloys.

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On effect of squeezing pressure on microstructural characteristics, heat treatment response and electrical conductivity of an Al-Si-Mg-Ni-Cu alloy

Cited by 18 publications

References 25 publications

Effect of Si, Cu and processing parameters on Al-Si-Cu HPDC castings

Effect of Si, Cu and processing parameters on Al-Si-Cu HPDC castings

Characteristics of defect bands and their formation mechanisms in A356 wheel fabricated by horizontal squeeze casting

Research Progress on Thermal Conductivity of High-Pressure Die-Cast Aluminum Alloys

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