Microstructure and tensile properties of thixoformed A356 alloy

Journal Article · Sat Mar 15 04:00:00 EDT 2008 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2006.12.010· OSTI ID:21062199

Tahamtan, S ^[1]; Karimzadeh, F; Niroumand, B ^[1]

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1. Isfahan University of Technology (Iran, Islamic Republic of)

In the research work presented here, mechanical properties of a thixoformed A356 alloy were measured and compared with the mechanical properties of rheocast and gravity-cast alloy with the same composition. In the thixoforming process, a 60% solid fraction rheocast alloy was reheated to 600 deg. C or 610 deg. C, held about 10 min, and then reduced by 30% or 50% reduction of cross section. Microstructural and mechanical properties of the alloys were investigated. The results obtained show that the tensile strength, yield strength and elongation-to-failure of the alloy thixoformed at 600 deg. C was greater than that thixoformed at 610 deg. C. Moreover, the tensile strength, yield strength and elongation-to-failure of the thixoformed alloy were higher than those of the rheocast and gravity-cast samples. The improvement in the mechanical properties due to thixoforming is attributed to morphological aspects of the silicon phase, as well as to the non-dendritic structure produced.

• OSTI ID: 21062199
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 3 Vol. 59; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CROSS SECTIONS
ELONGATION
FRACTOGRAPHY
HOT WORKING
MICROSTRUCTURE
SILICON ALLOYS
TEMPERATURE RANGE 0400-1000 K
TENSILE PROPERTIES
YIELD STRENGTH