Aluminium and aluminium alloys. Mechanical potential of Al-Si alloys for high pressure, low pressure and gravity die casting

2014 ◽  
Keyword(s):  
High Pressure ◽  
Aluminium Alloys ◽  
Die Casting ◽  
Low Pressure

scholarly journals Ejection Performance of Coated Core Pins Intended for Application on High Pressure Die Casting Tools for Aluminium Alloys Processing

2017 ◽  
Vol 39 (3) ◽  
pp. 334-339 ◽  
Author(s):  
P. Terek ◽  
L. Kovačević ◽  
A. Miletić ◽  
D. Kukuruzović ◽  
B. Škorić ◽  
...  
Keyword(s):  
High Pressure ◽  
Aluminium Alloys ◽  
Die Casting ◽  
High Pressure Die Casting ◽  
Pressure Die Casting

Microstructure and Mechanical Properties of Low Pressure Die Cast AM50 Magnesium Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 167-170 ◽  
Author(s):  
Li Ming Peng ◽  
Peng Huai Fu ◽  
Hai Yan Jiang ◽  
Chun Quan Zhai
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
Die Casting ◽  
Low Pressure ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Die Cast ◽  
Second Phases ◽  
Am50 Alloy ◽  
Pressure Die Casting

Compact AM50 alloy components were cast by Low Pressure Die Casting (LPDC) process. The microstructure and mechanical properties of cast components were investigated under as-cast and heat treated states. It was found that the microstructure of LPDC AM50 is composed of α-Mg and second phases - Mg17Al12 and Al8Mn5. Compared with Gravity die casting, LPDC AM50 alloy had much coarser grains and higher density, with smaller sizes and less content of second phases. The density of AM50 alloy by LPDC process was ρ=1.7836g/cm3, with increase of 0.45% based on Gravity die casting and much more increase compared with high pressure die casting. The as-cast mechanical properties by LPDC process were: σ0.2=57.8Mpa, σb=192.3Mpa, δ=8.7%. These of Gravity die casting were: σ0.2=53Mpa, σb=173.4Mpa, δ=8.1%. UTS in LPDC increased about 20MPa, with better YTS and Elongation. Compared with that of high pressure die cast AM50, the YTS of LPDC was much lower, with comparable UTS and Elongation. The mechanical properties of the heat treated AM50 alloy were still in the same level of as-cast state. AM50 alloy by LPDC process is not necessary subjected to tempering treatment.

R-HPDC of Magnesium Alloys

2012 ◽  
Vol 192-193 ◽  
pp. 225-230 ◽  
Author(s):  
Ulyate Andries Curle ◽  
Jeremias D. Wilkins ◽  
Gonasagren Govender
Keyword(s):  
High Pressure ◽  
Magnesium Alloys ◽  
Aluminium Alloys ◽  
Die Casting ◽  
Intermetallic Phase ◽  
Mg17al12 Phase ◽  
Liquid Segregation ◽  
Surface Liquid ◽  
Pressure Die Casting ◽  
Cast Microstructure

Flexibility of the Council for Scientific and Industrial Research’s Rheocasting System (CSIR-RCS) and its rheo-high pressure die casting (R-HPDC) technology is again demonstrated, as with aluminium alloys, by processing and shape casting of three different magnesium alloys (AM50A, AM60B, AZ91D) in a first attempt. All as-cast microstructures are characterised more by rosette shaped globules of the primary-(Mg) phase together with Mg17Al12 as evidence of non-equilibrium cooling rates. Surface liquid segregation is observed in the as-cast microstructure for all three alloys. Minor alloy additions of Mn, in composition specifications, results in the formation of Al8Mn5 intermetallic phase particles dispersed throughout the microstructure. All alloys were homogenised at 415 °C for 16 hours for the T4 condition. The Mg17Al12 phase dissolves with homogenisation while the Al8Mn5 intermetallic phase does not dissolve. The resulting tensile properties of all three alloys in the as-cast and T4 conditions are reported.

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