ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Compact AM50 alloy components were cast by Low Pressure Die Casting (LPDC)process. The microstructure and mechanical properties of cast components were investigated underas-cast and heat treated states. It was found that the microstructure of LPDC AM50 is composed ofα-Mg and second phases - Mg17Al12 and Al8Mn5. Compared with Gravity die casting, LPDC AM50alloy had much coarser grains and higher density, with smaller sizes and less content of secondphases. 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. Theas-cast mechanical properties by LPDC process were: σ0.2=57.8Mpa, σb=192.3Mpa, δ=8.7%. Theseof Gravity die casting were: σ0.2=53Mpa, σb=173.4Mpa, δ=8.1%. UTS in LPDC increased about20MPa, with better YTS and Elongation. Compared with that of high pressure die cast AM50, theYTS of LPDC was much lower, with comparable UTS and Elongation. The mechanical properties ofthe heat treated AM50 alloy were still in the same level of as-cast state. AM50 alloy by LPDC processis not necessary subjected to tempering treatment
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.167.pdf
